Oslo, Norway Climate & Monthly Averages
The climate of Oslo
Cold is the baseline in Oslo, not the exception. Night-time lows sit at or below freezing in 4 months of the year, and the warmest month, July, still only averages 70°F (21°C) by day. January runs to 22°F (-6°C) after dark.
Climate quick facts
- Hottest month: July - highs near 70°F (21°C)
- Coldest month: January - highs near 31°F (-1°C)
- Decade extremes (2015-2024): 90°F (32°C) high · -18°F (-28°C) low
- Wettest month: July (13 rainy days) · Sunniest: June (13.1 h sun/day)
- Climate type: humid continental
- Annual swing: 20°C between the average warmest and coolest month · day to night: 7°C
- Snow: about 31 days a year
- Months with freezing average lows: 4
- Average humidity: 78%
Temperatures through the year
Days and nights are about 7°C apart on average - narrower than about 85% of the cities we track. January sits at the other end of the year: 31°F (-1°C) by day, 22°F (-6°C) at night. July is the warm end of the year, averaging 70°F (21°C) by day and 56°F (13°C) overnight. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 90°F (32°C) and the lowest daily minimum -18°F (-28°C). The wettest month is July (4.4 inches (112 mm) across 13 days) and the driest April.
Rain, sun and snow
Snow falls on roughly 31 days a year, mostly October through May. Sunshine averages 7.5 hours a day over the year - duller than all but 7% of the 3496 cities in our dataset, peaking in June at 13.1 hours.
How Oslo compares
- Oslo averages 44°F (7°C) across the year - cooler than all but 3% of the 3496 cities we track.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 31° | 22° | 12 | 2.9 in | 2.7 h/day | 6.7 h | 37% | 85% |
| February | 34° | 24° | 10 | 2.3 in | 4.7 h/day | 9.0 h | 36% | 82% |
| March | 40° | 27° | 9 | 2.3 in | 7.1 h/day | 11.6 h | 30% | 78% |
| April | 50° | 34° | 8 | 1.9 in | 10.3 h/day | 14.5 h | 27% | 66% |
| May | 61° | 44° | 12 | 3.1 in | 11.7 h/day | 17.1 h | 39% | 66% |
| June | 69° | 53° | 12 | 3.4 in | 13.1 h/day | 18.8 h | 38% | 67% |
| July | 70° | 56° | 13 | 4.4 in | 12.5 h/day | 18.0 h | 42% | 71% |
| August | 68° | 54° | 13 | 3.7 in | 10.5 h/day | 15.6 h | 42% | 76% |
| September | 61° | 49° | 11 | 4.0 in | 7.5 h/day | 12.7 h | 37% | 80% |
| October | 49° | 40° | 12 | 3.3 in | 4.8 h/day | 10.0 h | 38% | 85% |
| November | 39° | 33° | 12 | 3.2 in | 2.6 h/day | 7.4 h | 40% | 88% |
| December | 33° | 25° | 13 | 2.6 in | 1.9 h/day | 5.9 h | 41% | 88% |
Oslo month by month
Average high and low for each month, with the bar showing where it sits in Oslo's year (left is the coldest night, right is the warmest afternoon).
January
- Rain
- 12 days
- Sunshine
- 2.7 h
- Daylight
- 6.7 h
- Snow
- 8 days
February
- Rain
- 10 days
- Sunshine
- 4.7 h
- Daylight
- 9.0 h
- Snow
- 7 days
March
- Rain
- 9 days
- Sunshine
- 7.1 h
- Daylight
- 11.6 h
- Snow
- 4 days
April
- Rain
- 8 days
- Sunshine
- 10.3 h
- Daylight
- 14.5 h
- Snow
- 1 day
May
- Rain
- 12 days
- Sunshine
- 11.7 h
- Daylight
- 17.1 h
June
- Rain
- 12 days
- Sunshine
- 13.1 h
- Daylight
- 18.8 h
July
- Rain
- 13 days
- Sunshine
- 12.5 h
- Daylight
- 18.0 h
August
- Rain
- 13 days
- Sunshine
- 10.5 h
- Daylight
- 15.6 h
September
- Rain
- 11 days
- Sunshine
- 7.5 h
- Daylight
- 12.7 h
October
- Rain
- 12 days
- Sunshine
- 4.8 h
- Daylight
- 10.0 h
November
- Rain
- 12 days
- Sunshine
- 2.6 h
- Daylight
- 7.4 h
- Snow
- 3 days
December
- Rain
- 13 days
- Sunshine
- 1.9 h
- Daylight
- 5.9 h
- Snow
- 6 days
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
Seasons in Oslo
Spring (March through May)
Spring in Oslo runs cold, with daytime highs averaging 51°F (10°C) and nights around 35°F (2°C); expect showers on roughly 30 days across the season, plus about 6 snowy days.
Summer (June through August)
Summer is pleasantly warm here - highs near 69°F (20°C), nights near 54°F (12°C), and rain falls on around 37 of the 90 days. Daylight is generous - around 12.0 hours of sun a day.
Fall (September through November)
Fall in Oslo is brisk and cold, with daytime highs averaging 50°F (10°C) and nights around 41°F (5°C); rain falls on around 35 of the 90 days, plus about 3 snowy days.
Winter (December through February)
Through winter, Oslo is bitterly cold: 33°F (0°C) by day, 24°F (-5°C) after dark, and rain falls on around 35 of the 90 days, plus about 22 snowy days. Sun is scarce, averaging 3.1 hours a day. Wind sharpens cold like this considerably; pair the forecast winds with the wind speed converter to judge exposed conditions.
Climate questions, answered
How warm is Oslo on average?
What should I wear in Oslo?
How humid does Oslo get?
How many rainy days does Oslo get in a year?
Is Oslo cold in winter?
How sunny is Oslo?
Best time to visit Oslo
The best time to visit Oslo is generally April to September, when these are the warmest and brightest weeks of the year. Daytime temperatures in that window sit near 63°F (17°C), with rain on about 11 days a month. For the same question asked the other way round, see where else is warm in April.
Pack for Oslo with a heavy insulated coat, hat and gloves for winter and a compact umbrella or rain shell. Note the gap between afternoon and night: July pairs 70°F (21°C) with 56°F (13°C).
Oslo temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.