May weather forecast
Oslo, Norway

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.