May weather forecastSlemmestad, Norway

May

Weather in May

May, the last month of the spring in Slemmestad, is a moderate month, with temperature in the range of an average low of 5.5°C (41.9°F) and an average high of 14.4°C (57.9°F).

Temperature

Slemmestad's transition into May brings a rise in the average high-temperature, moving from a chilly 9.1°C (48.4°F) in April to a moderate 14.4°C (57.9°F). Throughout May, Slemmestad witnesses a consistent average low-temperature of 5.5°C (41.9°F).

Humidity

With an average relative humidity of 71%, May is the least humid month.

Rainfall

In Slemmestad, Norway, during May, the rain falls for 14.4 days and regularly aggregates up to 36mm (1.42") of precipitation. In Slemmestad, during the entire year, the rain falls for 127.7 days and collects up to 307mm (12.09") of precipitation.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.4 snowfall days, in May, Slemmestad aggregates 2mm (0.08") of snow. Throughout the year, in Slemmestad, Norway, there are 42.9 snowfall days, and 271mm (10.67") of snow is accumulated.

Sea temperature

In Slemmestad, Norway, the average seawater temperature in May is 10.8°C (51.4°F).
Note: Danger awaits those who swim in 10.8°C (51.4°F) without protection. Falling below 10°C (50°F) means intense cold shock and hyperventilation.

Daylight

In Slemmestad, the average length of the day in May is 17h and 8min.
On the first day of the month, sunrise is at 05:14 and sunset at 21:15. On the last day of May, in Slemmestad, sunrise is at 04:09 and sunset at 22:22 CEST.

Sunshine

In Slemmestad, the average sunshine in May is 9.1h.

UV index

The months with the highest UV index in Slemmestad are May through August, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In May, a daily UV index of 4 turns into the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.

Updated: Jan 26, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature, in May, in Slemmestad, is 14.4°C (57.9°F), while the low-temperature averages to 5.5°C (41.9°F).

The least humid month in Slemmestad is May, with an average relative humidity of 71%.

The average relative humidity in May in Slemmestad is 71%.

In May, in Slemmestad, the rain falls for 14.4 days. Throughout May, 36mm (1.42") of precipitation is accumulated.

May is the last month it regularly snows in Slemmestad. During 0.4 snowfall days, in May, Slemmestad aggregates 2mm (0.08") of snow.

In Slemmestad, Norway, in May, the average water temperature is 10.8°C (51.4°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

The average day length in May is 17h and 8min.

In May, on the first day of the month, sunrise is at 05:14 and sunset at 21:15. On the last day of the month, in Slemmestad, Norway, sunrise is at 04:09 and sunset at 22:22 CEST.

In Slemmestad, the average sunshine duration in May is 9.1h.

The months with the highest UV index in Slemmestad are May through August, with an average maximum UV index of 4.

In Slemmestad, Norway, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

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

Apr

May

Jun

Average high temperature

9.1°C

14.4°C

18.2°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

10.3km/h

10.5km/h

9.9km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

1.8

0.4

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

15.3

13.5

11.9

Average UV index

Average cloud cover

47%

45%

Average visibility

9km

Average temperature in May
Slemmestad, Norway

Average high temperature in May: 14.4°C

The warmest month (with the highest average high temperature) is July (20.4°C).
The month with the lowest average high temperature is January (-2.4°C).

Average low temperature in May: 5.5°C

The month with the highest average low temperature is July (10.8°C).
The coldest month (with the lowest average low temperature) is February (-7.8°C).

Average pressure in May
Slemmestad, Norway

Average pressure in May: 1014.2mbar

The month with the highest atmospheric pressure is April (1014.5mbar).
The month with the lowest atmospheric pressure is December (1008mbar).

Average wind speed in May
Slemmestad, Norway

Average wind speed in May: 9.6km/h

The windiest month (with the highest average wind speed) is January (9.9km/h).
The calmest month (with the lowest average wind speed) is August (8.3km/h).

Average humidity in May
Slemmestad, Norway

Average humidity in May: 71%

The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is May (71%).

Average rainfall in May
Slemmestad, Norway

Average rainfall in May: 36mm

The wettest month (with the highest rainfall) is July (40mm).
The driest month (with the least rainfall) is April (13mm).

Average rainfall days in May
Slemmestad, Norway

Average rainfall days in May: 14.4 days

The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is February (4.3 days).

Average snowfall in May
Slemmestad, Norway

Average snowfall in May: 2mm

The month with the highest snowfall is March (73mm).
The months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in May
Slemmestad, Norway

Average snowfall days in May: 0.4 days

The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in May
Slemmestad, Norway

Average sea temperature in May: 10.8°C

The best month for swimming (with the highest average sea temperature) is August (17.8°C).
The coldest month (with the lowest average sea temperature) is March (3.2°C).

Average daylight in May /
Average sunshine in May
Slemmestad, Norway

Average daylight in May: 17h and 6min

The month with the longest days is June (Average daylight: 18h and 36min).
The month with the shortest days is December (Average daylight: 6h and 6min).

Average sunshine in May: 9h and 6min

The month with the most sunshine is June (Average sunshine: 11h and 24min).
The months with the least sunshine are January and December (Average sunshine: 3h and 12min).

Average sunshine days in May
Slemmestad, Norway

Average sunshine days in May: 13.5 days

The month with the most sunshine days is December (18.3 days).
The month with the least sunshine days is July (10.6 days).

Average UV index in May
Slemmestad, Norway

Average UV index in May: 4

The months with the highest UV index are May, June, July and August (UV index 4).
The months with the lowest UV index are January and February (UV index 1).