Climate and monthly weather forecast
Sundsvall, Sweden

Year J F M A M J J A S O N D

°Celsius °Fahrenheit

The climate of Sundsvall

Sundsvall, Sweden, experiences the dominant climate of subarctic, severe winter, no dry season, and a cool summer, as classified under the Köppen climate system as Dfc. This geographic area, situated along the eastern seaboard of Sweden, exhibits significant temperature variations throughout the year with contrasting levels of precipitation and humidity.

A quick glance at the climate data throughout the year exhibits considerable seasonal changes. The average high temperatures range from -3°C (26.6°F) in January to a peak of 20.3°C (68.5°F) in July, whereas the average low temperatures fluctuate from -6.6°C (20.1°F) in January to 11.4°C (52.5°F) in July. The recorded variance in humidity levels is chiefly seen from 66% in the dry summer months of May and June, rising to high relative humidity levels of 91% in February. Precipitation ranges between 19mm (0.75") in April to a high of 45mm (1.77") in July, establishing July as the rainiest month. Overall, the city experiences a broad spectrum of weather makeup - every parameter from temperature, humidity, precipitation to daylight and sunshine hours, UV index, and wind speed shows significant fluctuation indicating a diverse climatic pattern.

Taking a deep dive into the specifics, Sundsvall goes through unique weather conditions and patterns. The city experiences the maxim um snowfall of 217mm (8.54") in January, after which the levels start to decline, reaching zero between June and September. It then picks up in October, peaking again in December with a snowfall of 197mm (7.76"). Maximum daylight hours are seen in June with 19.8 hours, while December sees the least amount of daylight with just 5.2 hours. The sunshine hours mirror the daylight pattern, with peak hours in June, 12.3 hours, and a low of 1.7 hours in December.

The best time to visit Sundsvall

Given Sundsvall's varied climate, the best time to visit largely depends on the desired activities. Nevertheless, the most favorable period is typically between June and August. During these summer months, the city sees an average high temperature ranging from 17.2°C (63°F) to 20.3°C (68.5°F), offering a conducive environment for outdoor activities. It's also the time when the city experiences the longest daylight hours, ranging from 17.9 hours to 19.8 hours. Additionally, the rainfall steadies to an average of 28mm (1.1") to 45mm (1.77"), and snowfall is non-existent, making it an ideal time for sightseeing and enjoying the Swedish summer.

The worst time to visit Sundsvall

The less favorable time to visit Sundsvall is during the winter months, from November to March. The city undergoes colder conditions, with average high temperatures ranging between -1.3°C (29.7°F) to 2°C (35.6°F), and average lows between -0.7°C (30.7°F) to -6.6°C (20.1°F). These months also witness the highest snowfall, with an average snowfall reaching up to 217mm (8.54") in January. Also, the daylight hours shrink to a bare minimum, between 5.2 hours to 8.9 hours. This drop in temperature and sunlight makes it challenging for outdoor activities and sightseeing.

Spring weather in Sundsvall

Spring in Sundsvall, spanning from March to May, can be quite unpredictable. Average high temperatures begin at 1°C (33.8°F) in March and steadily rise to 12.8°C (55°F) in May, whereas the average low temperatures range from -4.3°C (24.3°F) to 4.8°C (40.6°F). Rainfall holds steady, with a moderate amount landing from 19mm (0.75") in March to 33mm (1.3") in May. Although snowfall lessens during this time, it persists, with an average snowfall of 193mm (7.6") in March, 35mm (1.38") in April, and 21mm (0.83") in May. With daylight hours increasing from 11.8 hours in March to 17.9 hours in May, the season gradually ushers residents into the much-awaited summer.

Summer weather in Sundsvall

Sundsvall exhibits a delightful summer season, extending from June to August, with average high temperatures between 17.2°C (63°F) to 20.3°C (68.5°F) and average lows from 8.8°C (47.8°F) to 11.4°C (52.5°F). Interestingly, rainfall peaks to 45mm (1.77") in July but tapers to 32mm (1.26") in August. There's an absolute absence of snowfall during these months. The city basks in the most abundant daylight hours, from 19.8 hours to 18.8 hours. On average, constituting the longest days throughout the year, the summer season provides the perfect backdrop for outdoor recreation.

Autumn weather in Sundsvall

Autumn in Sundsvall, typically from September to November, showcases a blend of changing colors and chillier weather. Average high temperatures drop from 14°C (57.2°F) in September to 2°C (35.6°F) in November, while the average low temperatures decrease from 7.3°C (45.1°F) to -0.7°C (30.7°F). Rainfall remains relatively stable, between 32mm (1.26") to 36mm (1.42"), and a reappearance of snow in November, totaling 73mm (2.87"). Daylight hours start to gradually decline from 13 hours in September to just 7 hours in November, signalling the onset of winter.

Winter weather in Sundsvall

Winter in Sundsvall, from December to February, is intense with average high temperatures between -3°C (26.6°F) to -1.3°C (29.7°F) and average lows from -6.6°C (20.1°F) to -4.5°C (23.9°F). December records the highest snowfall at 197mm (7.76") before lessening to 153mm (6.02") in February. Notably, during these months, the city experiences the shortest daylight hours, ranging from 6.2 hours in December to a slight increase to 8.9 hours in February. Despite the chill, the city's winter landscape is truly a sight to behold, radiating a unique stellar beauty.

Weather in January

Sundsvall, Sweden, experiences its coldest climate in January, with temperatures fluctuating between -6.6°C (20.1°F) and -3°C (26.6°F). The sea remains frigid at 1°C (33.8°F), maintaining a withering environment. Additionally, the daylight duration is merely 6.2 hours, which limits outdoor activities. Weather in January »

Weather in February

Destination Sundsvall transitions to a slightly warmer month in February. The sea water's temperature remains consistent at 1°C (33.8°F), suggesting the continuation of a cold atmosphere throughout the month. February inherits the snowfalls from January but at a lower magnitude, indicating the onset of a transition phase in weather conditions. Weather in February »

Weather in March

The weather changes more significantly in March with temperatures ranging from -4.3°C (24.3°F) to 1°C (33.8°F), marking a shift from the more deep-freezing conditions of the preceding months. Snowfall reduces noticeably from 193mm (7.6") to 35mm (1.38"), suggesting the dominance of milder weather conditions. Weather in March »

Weather in April

In April, the city enjoys a warming trend as the mercury begins to rest above freezing, transforming the white landscape into a vibrant setting. The lowest temperature climbs to 0.5°C (32.9°F), indicating an improvement from March's chilliness. Weather in April »

Weather in May

May sees the meteorological conditions in Sundsvall further transform into a milder and more pleasant climate. It brings comfortable warmth, greenery, and a noticeable reduction in rainfall from 33mm (1.3") to 28mm (1.1"), highlighting the pleasing transition from spring to early summer. Weather in May »

Weather in June

June ushers Sundsvall into the warm embrace of summer, featuring an enjoyable seaside climate conducive to beach outings. The rise in both sea temperatures to 9°C (48.2°F) and daylight hours to 19.8 hints at a joyous summer's arrival. Weather in June »

Weather in July

July is the hottest month in Sundsvall with temperatures reaching up to 20.3°C (68.5°F), turning the city into an ideal summer escape. Despite this temperature peak, the weather remains pleasant due to the optimal sea temperature, adding charm to the region. Weather in July »

Weather in August

August experiences a slight dip from July's peak temperatures, yet the weather remains comfortably warm in Sundsvall. The sea temperature reaches its annual maximum of 15°C (59°F), luring beach and marine enthusiasts alike. This month inherits July's weather traits with slightly cooler nights, intensifying the enjoyable contrast of refreshing mornings and warm afternoons. Weather in August »

Weather in September

September signals the transition from summer to autumn, offering a blend of warm and cool days in Sundsvall. With temperatures oscillating between 7.3°C (45.1°F) and 14°C (57.2°F), the month witnesses a gradual decrease in warmth. Weather in September »

Weather in October

The climate in Sundsvall becomes noticeably colder in October, as reflected in the temperatures dipping below 10°C (50°F) on average. The sea temperature cools down to 8°C (46.4°F), preparing for the incoming winters. Despite this, the daylight duration remains sufficient, presenting opportunities for fulfilling daytime activities. Weather in October »

Weather in November

November forecasts a steeper plunge in temperatures, with measurements dipping to -0.7°C (30.7°F), indicating the onset of the chilly winter. The sea temperature continues to decrease, resting at 5°C (41°F) and marking the unavoidable transition into wintry conditions. Weather in November »

Weather in December

December signifies the arrival of the frosty winter season in Sundsvall, with temperatures fluctuating from -1.3°C (29.7°F) to -4.5°C (23.9°F). The sea temperature touches a low of 3°C (37.4°F), accompanying the biting cold of the air. Weather in December »

Frequently asked questions

What month is the coldest in Sundsvall?

The coldest period in Sundsvall tends to be January, when average temperatures fluctuate between a high of -3°C (26.6°F) and a low of -6.6°C (20.1°F).

How many days does it rain in Sundsvall?

In Sundsvall, Sweden, during the entire year, the rain falls for 117.2 days and collects up to 384mm (15.12") of precipitation.

When does it snow in Sundsvall?

January through May, October through December are months with snowfall in Sundsvall, Sweden.

When does it snow the most in Sundsvall?

The month with the most snowfall is January, when snow falls for 15.2 days and typically aggregates up to 217mm (8.54") of snow.

How much does it snow in Sundsvall?

In Sundsvall, Sweden, during the entire year, snow falls for 70.7 days and aggregates up to 908mm (35.75") of snow.

When is the sea coldest in Sundsvall?

January through March, with an average sea temperature of 1°C (33.8°F), are months with the coldest seawater in Sundsvall.

What is the month with the lowest UV index in Sundsvall?

The months with the lowest UV index in Sundsvall, Sweden, are January, February, November and December, with an average maximum UV index of 1.

What is the most humid month in Sundsvall?

The most humid month is February, with an average relative humidity of 91%.

What is the driest month in Sundsvall?

The month with the least rainfall in Sundsvall, Sweden, is April, when the rain falls for 10.7 days and typically collects 19mm (0.75") of precipitation.

What is the least humid month in Sundsvall?

June is the least humid month in Sundsvall, Sweden, with an average relative humidity of 66%.

When it does not snow in Sundsvall?

June through September are months without snowfall in Sundsvall.

When are the longest days in Sundsvall?

With an average of 19h and 48min of daylight, June has the longest days of the year.

What month has the most sunshine in Sundsvall?

The month with the most sunshine in Sundsvall is June, with an average of 12.3h of sunshine.

What is the month with the highest UV index in Sundsvall?

June and July, with an average maximum UV index of 5, are months with the highest UV index in Sundsvall.

What is the hottest time of year in Sundsvall?

Sundsvall's warmest month, July, registers temperatures that range from a high of 20.3°C (68.5°F) to a low of 11.4°C (52.5°F).

What is the rainiest month in Sundsvall?

The month with the most rainfall in Sundsvall, Sweden, is July, when the rain falls for 14 days and typically aggregates up to 45mm (1.77") of precipitation.

What is the month with the warmest sea water in Sundsvall?

The month with the warmest seawater in Sundsvall, Sweden, is August, with an average sea temperature of 15°C (59°F).

When is Daylight Saving Time (DST) in Sundsvall?

On Sunday, 27. October 2024, at 03:00, Daylight Saving Time ends in Sundsvall, Sweden, and the time zone changes from CEST to CET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 02:00, and the time zone reverts from CET to CEST.

What is the month with the shortest days in Sundsvall?

December has the shortest days of the year, with an average of 5h and 12min of daylight.

What is the month with the least sunshine in Sundsvall?

December has the least sunshine of the year in Sundsvall, with an average of 1.7h of sunshine.

Year J F M A M J J A S O N D

Average temperature
Sundsvall, Sweden

Average temperature - Sundsvall, Sweden

Average high temperature in January:
-3°C
Average high temperature in February:
-2.4°C
Average high temperature in March:
1°C
Average high temperature in April:
7°C
Average high temperature in May:
12.8°C
Average high temperature in June:
17.2°C

Average high temperature in July:
20.3°C
Average high temperature in August:
18.7°C
Average high temperature in September:
14°C
Average high temperature in October:
7.1°C
Average high temperature in November:
2°C
Average high temperature in December:
-1.3°C

The warmest month (with the highest average high temperature) is July (20.3°C).
The month with the lowest average high temperature is January (-3°C).

Average low temperature in January:
-6.6°C
Average low temperature in February:
-6.9°C
Average low temperature in March:
-4.3°C
Average low temperature in April:
0.5°C
Average low temperature in May:
4.8°C
Average low temperature in June:
8.8°C

Average low temperature in July:
11.4°C
Average low temperature in August:
10.5°C
Average low temperature in September:
7.3°C
Average low temperature in October:
2.3°C
Average low temperature in November:
-0.7°C
Average low temperature in December:
-4.5°C

The month with the highest average low temperature is July (11.4°C).
The coldest month (with the lowest average low temperature) is February (-6.9°C).

Average pressure
Sundsvall, Sweden

Average pressure - Sundsvall, Sweden

Average pressure in January:
1009.9mbar
Average pressure in February:
1010.2mbar
Average pressure in March:
1010.2mbar
Average pressure in April:
1013.1mbar
Average pressure in May:
1014.3mbar
Average pressure in June:
1011.9mbar

Average pressure in July:
1010.5mbar
Average pressure in August:
1011.4mbar
Average pressure in September:
1011.9mbar
Average pressure in October:
1012.8mbar
Average pressure in November:
1009.8mbar
Average pressure in December:
1005.9mbar

The month with the highest atmospheric pressure is May (1014.3mbar).
The month with the lowest atmospheric pressure is December (1005.9mbar).

Average wind speed
Sundsvall, Sweden

Average wind speed - Sundsvall, Sweden

Average wind speed in January:
11.9km/h
Average wind speed in February:
11.1km/h
Average wind speed in March:
11.6km/h
Average wind speed in April:
10.6km/h
Average wind speed in May:
10.4km/h
Average wind speed in June:
11km/h

Average wind speed in July:
10.3km/h
Average wind speed in August:
9.5km/h
Average wind speed in September:
10.5km/h
Average wind speed in October:
11km/h
Average wind speed in November:
11km/h
Average wind speed in December:
11.8km/h

The windiest month (with the highest average wind speed) is January (11.9km/h).
The calmest month (with the lowest average wind speed) is August (9.5km/h).

Average humidity
Sundsvall, Sweden

Average humidity - Sundsvall, Sweden

The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is June (66%).

Average rainfall
Sundsvall, Sweden

Average rainfall - Sundsvall, Sweden

The wettest month (with the highest rainfall) is July (45mm).
The driest month (with the least rainfall) is April (19mm).

Average rainfall days
Sundsvall, Sweden

Average rainfall days - Sundsvall, Sweden

Average rainfall days in January:
5.1 days
Average rainfall days in February:
4.2 days
Average rainfall days in March:
7.1 days
Average rainfall days in April:
10.7 days
Average rainfall days in May:
13.1 days
Average rainfall days in June:
12.3 days

Average rainfall days in July:
14 days
Average rainfall days in August:
13.3 days
Average rainfall days in September:
11.7 days
Average rainfall days in October:
9.8 days
Average rainfall days in November:
8.6 days
Average rainfall days in December:
7.3 days

The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is February (4.2 days).

Average snowfall
Sundsvall, Sweden

Average snowfall - Sundsvall, Sweden

The month with the highest snowfall is January (217mm).
The months with the least snowfall are June, July, August and September (0mm).

Average snowfall days
Sundsvall, Sweden

Average snowfall days - Sundsvall, Sweden

Average snowfall days in January:
15.2 days
Average snowfall days in February:
14.3 days
Average snowfall days in March:
13.1 days
Average snowfall days in April:
5.3 days
Average snowfall days in May:
1.4 days
Average snowfall days in June:
0 days

Average snowfall days in July:
0 days
Average snowfall days in August:
0 days
Average snowfall days in September:
0 days
Average snowfall days in October:
2.2 days
Average snowfall days in November:
6.5 days
Average snowfall days in December:
12.7 days

The month with the highest number of snowfall days is January (15.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature
Sundsvall, Sweden

Average sea temperature - Sundsvall, Sweden

Average sea temperature in January:
1°C
Average sea temperature in February:
1°C
Average sea temperature in March:
1°C
Average sea temperature in April:
2°C
Average sea temperature in May:
4°C
Average sea temperature in June:
9°C

Average sea temperature in July:
14°C
Average sea temperature in August:
15°C
Average sea temperature in September:
12°C
Average sea temperature in October:
8°C
Average sea temperature in November:
5°C
Average sea temperature in December:
3°C

The best month for swimming (with the highest average sea temperature) is August (15°C).
The coldest months (with the lowest average sea temperature) are January, February and March (1°C).

Average daylight / Average sunshine
Sundsvall, Sweden

Average daylight / Average sunshine - Sundsvall, Sweden

Average daylight in January:
6h and 1min
Average daylight in February:
8h and 5min
Average daylight in March:
11h and 5min
Average daylight in April:
14h and 5min
Average daylight in May:
17h and 5min
Average daylight in June:
19h and 5min

Average daylight in July:
18h and 5min
Average daylight in August:
16h and 0min
Average daylight in September:
12h and 5min
Average daylight in October:
9h and 5min
Average daylight in November:
7h and 0min
Average daylight in December:
5h and 1min

The month with the longest days is June (Average daylight: 19h and 48min).
The month with the shortest days is December (Average daylight: 5h and 12min).

Average sunshine in January:
2h and 3min
Average sunshine in February:
3h and 4min
Average sunshine in March:
5h and 1min
Average sunshine in April:
7h and 4min
Average sunshine in May:
9h and 5min
Average sunshine in June:
12h and 2min

Average sunshine in July:
11h and 5min
Average sunshine in August:
9h and 1min
Average sunshine in September:
7h and 4min
Average sunshine in October:
4h and 4min
Average sunshine in November:
3h and 3min
Average sunshine in December:
1h and 4min

The month with the most sunshine is June (Average sunshine: 12h and 18min).
The month with the least sunshine is December (Average sunshine: 1h and 42min).

Average sunshine days
Sundsvall, Sweden

Average sunshine days - Sundsvall, Sweden

Average sunshine days in January:
12.7 days
Average sunshine days in February:
12.5 days
Average sunshine days in March:
12.8 days
Average sunshine days in April:
14.8 days
Average sunshine days in May:
15.1 days
Average sunshine days in June:
15.5 days

Average sunshine days in July:
14.8 days
Average sunshine days in August:
15.8 days
Average sunshine days in September:
16.5 days
Average sunshine days in October:
17.6 days
Average sunshine days in November:
15.5 days
Average sunshine days in December:
13.3 days

The month with the most sunshine days is October (17.6 days).
The month with the least sunshine days is February (12.5 days).

Average UV index
Sundsvall, Sweden

Average UV index - Sundsvall, Sweden

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).

Average cloud cover
Sundsvall, Sweden

Average cloud cover - Sundsvall, Sweden

The month with the most cloud cover is February (Cloud cover 64).
The month with the least cloud cover is July (Cloud cover 42).

Average visibility
Sundsvall, Sweden

Average visibility - Sundsvall, Sweden

The months with the highest visibility are April, May, June, July, August and October (9km).
The months with the lowest visibility are January, February and March (7km).

Sundsvall, Sweden

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