May weather forecast
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 temperature in the range of an average high of 15.8°C (60.4°F) and an average low of 6.5°C (43.7°F).

Temperature

In Oslo, the average high-temperature in May rises from a chilly 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, during May, the rain falls for 5 days and regularly aggregates up to 53mm (2.09") of precipitation. In Oslo, 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 life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

In May, the average length of the day in Oslo, Norway, is 17h and 10min.
On the first day of the month, sunrise is at 05:14 and sunset at 21:13. On the last day of May, in Oslo, sunrise is at 04:08 and sunset at 22:21 CEST.

Sunshine

In May, the average sunshine is 7.1h.

UV index

In May, the average daily maximum UV index in Oslo is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 4 in May interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

How much does it rain in Oslo in May?

In Oslo, Norway, in May, during 5 rainfall days, 53mm (2.09") of precipitation is typically accumulated.

How cold is the water in May in Oslo?

In May, the average sea 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.

How many hours of daylight does Oslo have in May?

The average day length in May in Oslo, Norway, is 17h and 10min.

When is the sunrise / sunset in May in Oslo?

On the first day of May in Oslo, sunrise is at 05:14 and sunset at 21:13. On the last day of the month, sunrise is at 04:08 and sunset at 22:21 CEST.

How long on average sun shines in May in Oslo?

The average sunshine duration in May is 7.1h.

How high is the UV index in May in Oslo?

The average daily maximum UV index in May in Oslo is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to UV radiation.
Average rainfall days
Average sunshine
Average UV index

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

The 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: 17h and 10min

The month with the longest days is June (Average daylight: 18h and 41min).
The month with the shortest days is December (Average daylight: 6h and 4min).

  • Average sunshine in May: 7h and 6min

The month with the most sunshine is June (Average sunshine: 8h and 18min).
The month with the least sunshine is December (Average sunshine: 1h and 6min).

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Average UV index in May
Oslo, Norway

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

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

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