May weather forecastKeminmaa, Finland

May

Weather in May

May is the signal that winter is finally over in Keminmaa. The landscape shifts from snow-clad to verdant green, as temperatures begin to climb, resulting in milder weather comfortable for outdoor activities. In clear contrast to the snow-logged conditions present in April, May sees nearly no snowfall. Although the rainfall increases marginally from April, longer daylight hours are accounted for more sunshine than April ever experiences. The transition to June promises to bring even warmer temperatures, heralding the onset of summer.

Temperature

May in Keminmaa brings an increase in the average high-temperature, progressing from a cold 1.9°C (35.4°F) in April to a frosty 8.5°C (47.3°F). Keminmaa sustains an average of approximately an icy 3.8°C (38.8°F) during May nights, with little variation from daytime highs.

Humidity

In May, the average relative humidity is 76%.

Rainfall

In Keminmaa, in May, during 13.3 rainfall days, 36mm (1.42") of precipitation is typically accumulated. In Keminmaa, during the entire year, the rain falls for 127 days and collects up to 472mm (18.58") of precipitation.

Snowfall

January through June, October through December are months with snowfall. In Keminmaa, in May, snow falls for 3.4 days, with typically accumulated 37mm (1.46") of snow. In Keminmaa, during the entire year, snow falls for 98.7 days and aggregates up to 1035mm (40.75") of snow.

Sea temperature

In Keminmaa, in May, the average water temperature is 3°C (37.4°F).
Note: In the realm of swimming, this state is extremely cold, treacherous, and life-threatening. Without properly insulated waterproof clothing, hypothermia develops almost immediately.

Daylight

The average length of the day in May is 19h and 14min.
On the first day of May, sunrise is at 04:37 and sunset at 21:59. On the last day of the month, sunrise is at 02:40 and sunset at 23:58 EEST.

Sunshine

In May, the average sunshine in Keminmaa is 10.6h.

UV index

In May, the average daily maximum UV index in Keminmaa, Finland, is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: A maximum daily UV index of 3 during May morphs into the following directions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.

Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

May temperatures vary between a high-temperature of 8.5°C (47.3°F) and a low-temperature of 3.8°C (38.8°F).

The average relative humidity in May in Keminmaa, Finland, is 76%.

In Keminmaa, during May, the rain falls for 13.3 days and regularly aggregates up to 36mm (1.42") of precipitation.

In May, it is snowing for 3.4 days. Throughout May, 37mm (1.46") of snow is accumulated.

In Keminmaa, Finland, the average seawater temperature in May is 3°C (37.4°F). For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

In Keminmaa, Finland, the average day length in May is 19h and 14min.

On the first day of May, sunrise is at 04:37 and sunset at 21:59. On the last day of the month, sunrise is at 02:40 and sunset at 23:58 EEST.

In May, the average sunshine duration is 10.6h.

The average daily maximum UV index in May in Keminmaa is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

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

Apr

May

Jun

Average high temperature

1.9°C

8.5°C

13.6°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

13.1km/h

14.5km/h

14.9km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

3.4

0.1

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

13.8

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Keminmaa, Finland

Average high temperature in May: 8.5°C

The warmest month (with the highest average high temperature) is July (17.8°C).
The month with the lowest average high temperature is January (-6.3°C).

Average low temperature in May: 3.8°C

The month with the highest average low temperature is July (12.6°C).
The coldest month (with the lowest average low temperature) is January (-10.7°C).

Average pressure in May
Keminmaa, Finland

Average pressure in May: 1013.9mbar

The month with the highest atmospheric pressure is May (1013.9mbar).
The month with the lowest atmospheric pressure is December (1004.9mbar).

Average wind speed in May
Keminmaa, Finland

Average wind speed in May: 13.5km/h

The windiest month (with the highest average wind speed) is November (17.7km/h).
The calmest month (with the lowest average wind speed) is April (12.4km/h).

Average humidity in May
Keminmaa, Finland

Average humidity in May: 76%

The months with the highest relative humidity are January and February (94%).
The month with the lowest relative humidity is June (71%).

Average rainfall in May
Keminmaa, Finland

Average rainfall in May: 36mm

The wettest month (with the highest rainfall) is August (53mm).
The driest month (with the least rainfall) is April (28mm).

Average rainfall days in May
Keminmaa, Finland

Average rainfall days in May: 13.3 days

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is February (3.3 days).

Average snowfall in May
Keminmaa, Finland

Average snowfall in May: 37mm

The month with the highest snowfall is March (228mm).
The months with the least snowfall are July, August and September (0mm).

Average snowfall days in May
Keminmaa, Finland

Average snowfall days in May: 3.4 days

The month with the highest number of snowfall days is January (18.8 days).
The months with the least snowfall days are July, August and September (0 days).

Average sea temperature in May
Keminmaa, Finland

Average sea temperature in May: 3°C

The best month for swimming (with the highest average sea temperature) is July (16.8°C).
The coldest months (with the lowest average sea temperature) are January and February (-0.7°C).

Average daylight in May /
Average sunshine in May
Keminmaa, Finland

Average daylight in May: 19h and 12min

The month with the longest days is July (Average daylight: 20h and 42min).
The month with the shortest days is December (Average daylight: 3h and 18min).

Average sunshine in May: 10h and 36min

The month with the most sunshine is July (Average sunshine: 12h and 18min).
The month with the least sunshine is December (Average sunshine: 1h and 6min).

Average sunshine days in May
Keminmaa, Finland

Average sunshine days in May: 13.8 days

The month with the most sunshine days is October (13.9 days).
The month with the least sunshine days is December (9.9 days).

Average UV index in May
Keminmaa, Finland

Average UV index in May: 3

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, March, October and December (UV index 1).

Average cloud cover in May
Keminmaa, Finland

Average cloud cover in May: 48

The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 40).

Average visibility in May
Keminmaa, Finland

Average visibility in May: 9km

The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February, March and April (7km).