Oslo Weather in May

Oslo in May averages 16°C (61°F) during the day and 5°C (41°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Oslo in May

The climate data from previous years indicates about 14 days of rain, averaging 81 mm (3.2 in) for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Oslo in May

Expect highs of 16°C (61°F) in Oslo in May, with nights dropping to around 5°C (41°F). The difference between afternoon and evening temperatures is usually noticeable. With lows around 5°C (41°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Oslo in May

Expect a lot of sunshine this month, with about 241 hours of sun. These sunny conditions add to the overall experience.

Wind Speed in Oslo in May

Average wind conditions reach 2 m/s (4 knots) in May. This creates comfortable weather with light winds that gently move vegetation. Keep in mind this is an average. Daily conditions range from near-calm to more noticeable wind.

Average water temperature in May

With water temperatures around 8°C (46°F), swimming isn't really an option for most visitors. The cold sets in quickly and a wetsuit won't fully solve it.

For Oslo itself, June, July and August generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Norway, check out our Oslo's climate page.

Oslo Temperature in May

Min Temperature 5°C (41°F)  

Max Temperature 16°C (61°F)  

Water Temperature 8°C (46°F)  

Chance of Rain 47%  

Precipitation 81 mm (3.2 in)  

Rainy days 14 days  

Humidity 60%  

Windspeed 2 m/s (4 knots)  

Sunshine 241 hours  

Percentage Sunshine  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Oslo typically rise from around 13°C (55°F) at the start of May to approximately 17°C (63°F) by the end. Nights are cold, with lows typically ranging from 2°C (36°F) to 8°C (46°F).

Average temperatures in May

‹ Select year to compare to 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 ›

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in May

‹ Select year to compare to 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 ›

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Historical weather for Oslo in May

Browse day-by-day weather records for Oslo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

‹ 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 ›

‹ January February March April May June July August September October November December ›

Oslo historical weather extremes in May

Based on 50 years of weather observations (1976-2026), these are the most extreme conditions recorded in Oslo.

• On May 30, 2018, temperatures climbed to 29°C (84°F), marking the warmest May day on record.
• The coldest May day was on May 6, 2019, with a maximum of 3°C (37°F).
• Nighttime temperatures dropped to -5°C (23°F) on May 3, 1978, marking the coldest May night on record.
• The wettest May day on record brought 40 mm (1.6 in) of precipitation to Oslo (May 22, 2013).

What to Wear in Oslo in May

Comfortable temperatures call for an easy wardrobe in May. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Expect water temperatures of around 8°C (46°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Oslo in May

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

6/10

Walking

6/10

Camping

4/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Norway, check out our Oslo's climate page.

More climate data for Oslo

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Oslo climate overview or explore weather in Norway.