May weather forecast
Oslo, Norway

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

Weather in May

May witnesses the full bloom of spring, with warmer temperatures ranging from a low of 6.5°C (43.7°F) to a high of 15.8°C (60.4°F). Consequently, outdoor activities become more enjoyable as the greening parks and bustling waterfront areas teem with locals and tourists. Additionally, the longer daylight hours encourage ample exploration time. An excursion in the Oslo Archipelago becomes increasingly popular for its scenic beauty and diversity of wildlife.

Temperature

May's onset is marked by a temperature increase, moving from a chilly 9.1°C (48.4°F) in April to a moderate 15.8°C (60.4°F). Oslo's May nights cool down to an average low-temperature of 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. Throughout the year, there are 77 rainfall days, and 763mm (30.04") of precipitation is accumulated.

Sea temperature

In May, the average sea temperature in Oslo, Norway, is 10.7°C (51.3°F).
Note: Entering waters of 10.7°C (51.3°F) is life-endangering. A mere moment in 13°C (55.4°F) waters feels piercing cold, and below 10°C (50°F) it can lead to immediate cold shock and cessation of breathing control, depending on body resilience.

Daylight

In May, the average length of the day is 17h and 10min.
On the first day of May in Oslo, sunrise is at 05:13 and sunset at 21:14. On the last day of the month, sunrise is at 04:07 and sunset at 22:22 CEST.

Sunshine

In Oslo, the average sunshine in May is 7.1h.

UV index

The average daily maximum UV index in May in Oslo is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: In May, the average maximum UV index of 4 translates into the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
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Frequently asked questions

What is the average May temperature in Oslo?

The average high-temperature and low-temperature in Oslo during May are 15.8°C (60.4°F) and 6.5°C (43.7°F) respectively.

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 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.

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

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

When are sunrise and sunset in May in Oslo?

On the first day of May in Oslo, Norway, sunrise is at 05:13 and sunset at 21:14. On the last day of the month, sunrise is at 04:07 and sunset at 22:22 CEST.

How many hours of sunshine does Oslo have in May?

In Oslo, the average sunshine duration in May is 7.1h.

What is the UV index reading in May in Oslo?

In May, the average daily maximum UV index in Oslo, Norway, is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Average rainfall days
Average daylight
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 1min

The month with the longest days is June (Average daylight: 18h and 42min).
The month with the shortest days is December (Average daylight: 6h and 6min).

  • Average sunshine in May: 7h and 1min

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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Oslo, Norway

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