Oslo
Norway
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Oslo, Norway

The scenic view of the Vigeland sculpture park in Oslo, Norway, at dusk
The scenic view of the Vigeland sculpture park in Oslo, Norway, at dusk
May, the last month of the spring, in Oslo, is a mild month, with average temperature ranging between min 6.5°C (43.7°F) and max 15.8°C (60.4°F).

Temperature

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

Rainfall

In Oslo, in May, it is raining for 5 days, with typically 53mm (2.1") of accumulated precipitation. In Oslo, Norway, during the entire year, the rain falls for 77 days and collects up to 763mm (30") of precipitation.

Sea temperature

In May, the average sea temperature in Oslo is 10.7°C (51.3°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.

Daylight

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

Sunshine

In Oslo, the average sunshine is 7.1h.

UV index

In Oslo, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV radiation for ordinary individuals.
The average daily UV index of 4 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.

What is the temperature in May in Oslo?

In May, in Oslo, 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 (2.1") of precipitation.

How cold is the water in May in Oslo?

In Oslo, Norway, 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.

How many hours of daylight does Oslo have in May?

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

How many hours of sunshine does Oslo have in May?

In May, the average sunshine is 7.1h.

What is the UV index intensity in May in Oslo?

In Oslo, Norway, the average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe exposure to the Sun's UV rays.
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).
Coldest months (with the lowest average low temperature) are January and February (-6.8°C).

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 lowest rainfall) is February (36mm).

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 lowest number of rainy days is February (4 days).

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).

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 shortest days is December (Average daylight: 6.1h).

  • Average sunshine in May: 7.1h

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

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).