May weather forecast and climate
Oslo, Norway

The Vigeland sculpture park in Oslo, Norway, at dusk
The Vigeland sculpture park in Oslo, Norway, at dusk

Weather in May

The last month of the spring, May, is a moderate month in Oslo, Norway, with average temperature ranging between max 15.8°C (60.4°F) and min 6.5°C (43.7°F).

Temperature

In May, the average high-temperature increases, from a frosty 9.1°C (48.4°F) in April, to a mild 15.8°C (60.4°F). In May, in Oslo, the average low-temperature is 6.5°C (43.7°F).

Rainfall

In Oslo, it is raining for 5 days, with typically 53mm (2.09") of accumulated precipitation. In Oslo, Norway, during the entire year, the rain falls for 77 days and collects up to 763mm (30.04") of precipitation.

Sea temperature

In May, the average sea temperature in Oslo is 10.7°C (51.3°F).
Note: Swimming in 10.7°C (51.3°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The average length of the day is 17.2h.

Sunshine

The average sunshine in May is 7.1h.

UV index

The average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In May, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in May in Oslo?

In Oslo, in May, the average high-temperature is 15.8°C (60.4°F), and the average low-temperature is 6.5°C (43.7°F).

How much does it rain in Oslo in May?

In Oslo, Norway, during May, the rain falls for 5 days and regularly aggregates up to 53mm (2.09") of precipitation.

How cold is the water in May in Oslo?

In Oslo, in May, the average water temperature is 10.7°C (51.3°F). Swimming in 10.7°C (51.3°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in May in Oslo?

In May, the average length of the day in Oslo is 17.2h.

How long on average sun shines in May in Oslo?

The average sunshine in May in Oslo, Norway, is 7.1h.

How high is the UV index in May in Oslo?

In May, the average daily maximum UV index in Oslo is 4. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to the Sun's UV rays.

Average temperature in May
Oslo, Norway

Average temperature in May - Oslo, Norway
  • Average high temperature in May: 15.8°C

The warmest month (with the highest average high temperature) is July (21.5°C).
The month with the lowest average high temperature is January (-1.8°C).

  • Average low temperature in May: 6.5°C

The month with the highest average low temperature is July (12.2°C).
The coldest months (with the lowest average low temperature) are January and February (-6.8°C).

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Average rainfall in May
Oslo, Norway

Average rainfall in May - Oslo, Norway
  • Average rainfall in May: 53mm

The wettest month (with the highest rainfall) is September (90mm).
The driest month (with the least rainfall) is February (36mm).

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Average rainfall days in May
Oslo, Norway

Average rainfall days in May - Oslo, Norway
  • Average rainfall days in May: 5 days

Months with the highest number of rainy days are August, October and November (8 days).
The month with the least rainy days is February (4 days).

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Average sea temperature in May
Oslo, Norway

Average sea temperature in May - Oslo, Norway
  • Average sea temperature in May: 10.7°C

The best month for swimming (with the highest average sea temperature) is August (17.9°C).
The coldest month (with the lowest average sea temperature) is March (3°C).

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

Average daylight in May / Average sunshine in May - Oslo, Norway
  • Average daylight in May: 17.2h

The month with the longest days is June (Average daylight: 18.7h).
The month with the shortest days is December (Average daylight: 6.1h).

  • Average sunshine in May: 7.1h

The month with the most sunshine is June (Average sunshine: 8.3h).
The month with the least sunshine is December (Average sunshine: 1.1h).

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Average UV index in May
Oslo, Norway

Average UV index in May - Oslo, Norway
  • Average UV index in May: 4

Months with the highest UV index are June and July (UV index 5).
Months with the lowest UV index are January, November and December (UV index 0).

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