Climate and monthly weather forecastGrindavik, Iceland
Climate and monthly weather forecast
The climate of Grindavik
Grindavik, located in the southwest part of Iceland, is classified under the Köppen climate classification as Cfc. This type of climate corresponds to a marine west coast featuring cool summers.Throughout the year, the weather in Grindavik is characterized by significant changes in temperature, humidity, and precipitation, showing a rich interplay of the town's marine climate aspects. High temperatures range from 4.2°C (39.6°F) in the colder months to 12.2°C (54°F) during the warmest, while the low temperatures swing from 1.3°C (34.3°F) to 9.9°C (49.8°F). Humidity holds relatively steady throughout the year, deviating between 74% and 81%.
January and February feature the highest snowfall, with levels reaching 57mm (2.24") and 50mm (1.97") respectively. Conversely, these months also experience the most snowfall days, with on average 6.8 and 5 days respectively. Rainfall shows a peak of 99mm (3.9") in January with a secondary peak of 86mm (3.39") in September, whereas rainfall days peak at 19.3 in April and are lowest in June at 12.5 days.
The best time to visit Grindavik
An optimal time to visit Grindavik would likely be in the summer months when the temperatures are relatively warm, yet cool enough for comfort. Specifically, July, indicates the highest temperatures with highs reaching 12.2°C (54°F) and lows of 9.9°C (49.8°F). Additionally, this month sees the longest hours of daylight, approximately 19.4 hours, and the highest UV index reading of 4, allowing for plenty of daytime activities.Despite the relatively high humidity ranging from 80% to 81%, the lower rainfall levels, specifically in June with only 35mm (1.38"), make it a fair period for outdoor activities without the concern of heavy showers. Moreover, July being the windiest month with wind speeds of 20.3km/h (12.6mph), could prove to be quite exhilarating for visitors interested in wind-related activities.
The worst time to visit Grindavik
Conversely, the drawbacks of visiting Grindavik are most pronounced during the winter, particularly in January. This month sees the highest snowfall of the year with 57mm (2.24"), combined with the coldest high and low temperatures of 4.3°C (39.7°F) and 1.9°C (35.4°F) respectively. January also has the shortest amount of daylight per day, estimated at 5.7 hours.Additionally, this period experiences the highest rainfall of the year, recorded at 99mm (3.9"). The combination of these weather factors would suggest less friendly conditions for outdoor activities, potentially affecting the overall experience for visitors.
Spring weather in Grindavik
Spring in Grindavik transitions from lower to moderately high temperatures. March sees highs of 4.2°C (39.6°F) and lows of 1.3°C (34.3°F), progressing to 7.8°C (46°F) and 5.1°C (41.2°F) in May. Rainfall is relatively moderate compared to other seasons, ranging from 82mm (3.23") in March to 58mm (2.28") in May.Daylight hours significantly increase during spring, going from 11.8 in March to as long as 18.4 hours in May, offering more time for daytime activities. Snowfall is experienced until April, albeit at a reducing rate of 36mm (1.42") from the 75mm (2.95") observed in March.
Summer weather in Grindavik
The summer months in Grindavik usher in the best weather conditions of the year. From June to August, the highest temperatures increase from 10.5°C (50.9°F) to 12.2°C (54°F) while the low temperatures range from 8.1°C (46.6°F) to 9.8°C (49.6°F). Relative humidity rises to an annual high of 80% to 81% during these months, but the rainfall is among the lowest, at 35mm (1.38") in June and 59mm (2.32") in August.The hours of daylight peak at 20.6 in June, slowly reducing to 16.3 hours in August. June also experiences no snowfall, making it an ideal period for outdoor activities.
Autumn weather in Grindavik
In autumn, Grindavik experiences a gradual cooling off from the summer's temperatures. High temperatures decline from 10.3°C (50.5°F) in September to 5.8°C (42.4°F) in November. Conversely, low temperatures drop from 8.4°C (47.1°F) to 3.3°C (37.9°F) over the same period. Autumn also witnesses a significant increase in rainfall, from 86mm (3.39") in September to a slightly less amount of 72mm (2.83") in November.Regarding daylight hours, they begin to decrease in autumn, from 13 hours in September to just 6.6 hours by November. Despite this, the month of September still offers reasonably good weather for visitors before the onset of the harsh winter conditions.
Winter weather in Grindavik
Winter in Grindavik comes with a noticeable drop in temperatures and an increase in snowfall. High temperatures fall from 4.2°C (39.6°F) in December to the year's lowest of 4.2°C (39.6°F) in January and February. Low temperatures also plummet, ranging from 1.3°C (34.3°F) in December and February to 1.9°C (35.4°F) in January.Snowfall exhibits a significant increase with December receiving 52mm (2.05") and January observing the highest levels of 57mm (2.24"). Daylight hours drop to an annual low, with only 4.5 hours in December. The average pressure readings also dip to the lowest levels of 998mb in December and 996.1mb in January. These factors combined present challenging weather for visitors during Grindavik's winter.
Weather in January
The new year kicks off in Grindavik, Iceland, with winter firmly entrenched, bringing colder temperatures alongside higher levels of both snowfall and rainfall. January brings the highest snowfall levels of 57mm (2.24"), ensuring a winter wonderland experience. Weather in January »Weather in February
As February rolls in, the winter conditions in Grindavik still persist, yet the daylight gradually increases compared to January. Despite the increase in daylight time, there is a marginal drop in the snowfall levels to 50mm (1.97"). Weather in February »Weather in March
As March arrives, spring starts to nudge the winter chill in Grindavik. With this change, snowfall levels reach as high as 75mm (2.95"), marking the third month of winter. Visitors possibly can anticipate enjoying sights of lush icy landscapes, punctuated by the first signs of daffodils emerging from the frozen ground. Weather in March »Weather in April
April marks a noticeable shift in Grindavik's weather, with snowfall tapering off considerably to 36mm (1.42") compared to the previous month. Despite the more temperate conditions, remember to pack warm clothing as the air still retains a nip. Weather in April »Weather in May
May ushers in the pleasant spring season in Grindavik, providing a welcome break from the bone-chilling winter months. This dramatic change in weather conditions ceases snowfall entirely, heralding teeming life into the previously frozen landscape. Weather in May »Weather in June
By June, summer lays claim to Grindavik, with temperatures gently rising and no indications of snowfall. As locals and tourists alike appreciate the extended daylight hours amidst the captivating Icelandic environment. Often considered the best time to visit, Grindavik in June offers an array of outdoor activities, be it a dip in the Blue Lagoon or a midnight golfing session under the golden rays of the midnight sun. Weather in June »Weather in July
July holds the title as the warmest month in Grindavik, with maximum temperatures averaging around 12.2°C (54°F). These conditions offer the perfect excuse to explore the city and its surrounding topography more extensively. Popular activities include fishing in the rich Atlantic waters, hunting down hidden gems in local flea markets, and sampling the culinary delights offered by the bustling food stalls. Weather in July »Weather in August
August continues Grindavik's mild summer trend, with temperatures slightly dropping from July's highs. This change paves the way for a series of cultural festivals and events that dot the city's calendar at this time of year. As the month progresses, the Northern Lights gradually begin to make their return, delighting both locals and tourists with their magical performances. Weather in August »Weather in September
September sees a slight cool down in Grindavik's weather, yet the temperatures are still comfortably mild. The gradual decline in temperatures provides an ideal backdrop for enjoying outdoor activities, be it hiking along scenic coastal trails or visiting the local museums. Weather in September »Weather in October
Grindavik experiences a clear shift towards colder weather in October, with the temperature plunging to lows of 5.4°C (41.7°F). This period signals the onset of the winter season, with increased rainfall and the reappearance of snowfall after a long hiatus. Weather in October »Weather in November
November sees the Grindavik weather transition towards the colder end of the scale, reminding locals and tourists alike of the approaching winter. Snowfall levels jump up to 23mm (0.91"), painting Grindavik in a pristine white. Weather in November »Weather in December
December in Grindavik welcomes winter in full swing, with the temperature dropping to its lowest at 1.3°C (34.3°F). Despite the cold, spirits remain high as festive decorations light up the city in preparation for the holiday season. Weather in December »Updated: Feb 10, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January is the month with the most rainfall in Grindavik. Rain falls for 16.7 days and accumulates 99mm (3.9") of precipitation.
Throughout the year, in Grindavik, Iceland, there are 193.9 rainfall days, and 833mm (32.8") of precipitation is accumulated.
Months with snowfall in Grindavik, Iceland, are January through May, October through December.
In Grindavik, during the entire year, snow falls for 33.4 days and aggregates up to 297mm (11.69") of snow.
January has the least sunshine of the year, with an average of 2.3h of sunshine.
January through May, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Grindavik, Iceland.
February, March and December, when the average high-temperature reaches 4.2°C (39.6°F), are the coldest months.
March is the month with the most snowfall in Grindavik, Iceland. Snow falls for 8 days and accumulates 75mm (2.95") of snow.
The month with the coldest seawater in Grindavik, Iceland, is March, with an average sea temperature of 5.8°C (42.4°F).
June is the month with the least rainfall. Rain falls for 12.5 days and accumulates 35mm (1.38") of precipitation.
June through September are months without snowfall.
June has the longest days of the year in Grindavik, with an average of 20h and 36min of daylight.
Grindavik sees its peak of temperatures during July and August, with an average high-temperature of 12.2°C (54°F).
The months with the highest humidity are July and August, with an average relative humidity of 81%.
The month with the warmest seawater in Grindavik is July, with an average sea temperature of 11.7°C (53.1°F).
July is the month with the highest UV index in Grindavik, with an average maximum UV index of 4.
With an average of 7.6h of sunshine, August has the most sunshine of the year.
The least humid month in Grindavik is December, with an average relative humidity of 74%.
The month with the shortest days in Grindavik is December, with an average of 4h and 30min of daylight.
Grindavik, Iceland, does not observe Daylight Saving Time (DST). GMT timezone is used over the entire year.
Average temperature
Grindavik, Iceland
The warmest months (with the highest average high temperature) are July and August (12.2°C).
The months with the lowest average high temperature are February, March and December (4.2°C).
The month with the highest average low temperature is July (9.9°C).
The coldest months (with the lowest average low temperature) are March and December (1.3°C).
Average pressure
Grindavik, Iceland
- Average pressure in January:
996.1mbar - Average pressure in February:
997.3mbar - Average pressure in March:
1003.2mbar - Average pressure in April:
1008.5mbar - Average pressure in May:
1011.9mbar - Average pressure in June:
1013.7mbar
- Average pressure in July:
1009.4mbar - Average pressure in August:
1007.6mbar - Average pressure in September:
1002.6mbar - Average pressure in October:
1003.3mbar - Average pressure in November:
1001.1mbar - Average pressure in December:
998mbar
The month with the highest atmospheric pressure is June (1013.7mbar).
The month with the lowest atmospheric pressure is January (996.1mbar).
Average wind speed
Grindavik, Iceland
- Average wind speed in January:
34.8km/h - Average wind speed in February:
35km/h - Average wind speed in March:
32.7km/h - Average wind speed in April:
29.7km/h - Average wind speed in May:
24.8km/h - Average wind speed in June:
20.1km/h
- Average wind speed in July:
20.3km/h - Average wind speed in August:
22.4km/h - Average wind speed in September:
27.9km/h - Average wind speed in October:
30.2km/h - Average wind speed in November:
32.3km/h - Average wind speed in December:
34.1km/h
The windiest month (with the highest average wind speed) is February (35km/h).
The calmest month (with the lowest average wind speed) is June (20.1km/h).
Average humidity
Grindavik, Iceland
The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is December (74%).
Average rainfall
Grindavik, Iceland
The wettest month (with the highest rainfall) is January (99mm).
The driest month (with the least rainfall) is June (35mm).
Average rainfall days
Grindavik, Iceland
- Average rainfall days in January:
16.7 days - Average rainfall days in February:
14.7 days - Average rainfall days in March:
16 days - Average rainfall days in April:
19.3 days - Average rainfall days in May:
16.4 days - Average rainfall days in June:
12.5 days
- Average rainfall days in July:
14.8 days - Average rainfall days in August:
14.5 days - Average rainfall days in September:
19.9 days - Average rainfall days in October:
19.2 days - Average rainfall days in November:
16.5 days - Average rainfall days in December:
13.4 days
The month with the highest number of rainy days is September (19.9 days).
The month with the least rainy days is June (12.5 days).
Average snowfall
Grindavik, Iceland
The month with the highest snowfall is March (75mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days
Grindavik, Iceland
- Average snowfall days in January:
6.8 days - Average snowfall days in February:
5 days - Average snowfall days in March:
8 days - Average snowfall days in April:
3.8 days - Average snowfall days in May:
0.3 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:
0.5 days - Average snowfall days in November:
3.5 days - Average snowfall days in December:
5.5 days
The month with the highest number of snowfall days is March (8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature
Grindavik, Iceland
The best month for swimming (with the highest average sea temperature) is July (11.7°C).
The coldest month (with the lowest average sea temperature) is March (5.8°C).
Average daylight / Average sunshine
Grindavik, Iceland
- Average daylight in January:
5h and 42min - Average daylight in February:
8h and 36min - Average daylight in March:
11h and 48min - Average daylight in April:
15h and 6min - Average daylight in May:
18h and 24min - Average daylight in June:
20h and 36min
- Average daylight in July:
19h and 24min - Average daylight in August:
16h and 18min - Average daylight in September:
13h and 0min - Average daylight in October:
9h and 48min - Average daylight in November:
6h and 36min - Average daylight in December:
4h and 30min
The month with the longest days is June (Average daylight: 20h and 36min).
The month with the shortest days is December (Average daylight: 4h and 30min).
- Average sunshine in January:
2h and 18min - Average sunshine in February:
3h and 0min - Average sunshine in March:
4h and 6min - Average sunshine in April:
5h and 24min - Average sunshine in May:
7h and 24min - Average sunshine in June:
4h and 42min
- Average sunshine in July:
7h and 30min - Average sunshine in August:
7h and 36min - Average sunshine in September:
4h and 48min - Average sunshine in October:
4h and 12min - Average sunshine in November:
2h and 36min - Average sunshine in December:
2h and 42min
The month with the most sunshine is August (Average sunshine: 7h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days
Grindavik, Iceland
- Average sunshine days in January:
7.4 days - Average sunshine days in February:
7.5 days - Average sunshine days in March:
7.1 days - Average sunshine days in April:
7.1 days - Average sunshine days in May:
12.4 days - Average sunshine days in June:
15 days
- Average sunshine days in July:
14.7 days - Average sunshine days in August:
14.7 days - Average sunshine days in September:
8.5 days - Average sunshine days in October:
10 days - Average sunshine days in November:
9.4 days - Average sunshine days in December:
10.5 days
The month with the most sunshine days is June (15 days).
The months with the least sunshine days are March and April (7.1 days).
Average UV index
Grindavik, Iceland
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February, March, April, May, October, November and December (UV index 2).
Average cloud cover
Grindavik, Iceland
The month with the most cloud cover is March (Cloud cover 69).
The months with the least cloud cover are May, July and August (Cloud cover 60).
Average visibility
Grindavik, Iceland
The months with the highest visibility are June and August (10km).
The months with the lowest visibility are January, February, March, April, May, July, September, October, November and December (9km).
