Weather by month for Oslo, the best months to go and how Norway's regions differ, scored from 10 years of climate data.
Jul, Aug
The highest month scores: comfortable temperatures, little rain and plenty of sun.
Highs 20°C to 22°C · 13 rain days
Jun
Still good weather, just not quite the top months.
Highs 21°C · 12 rain days
Jan, Feb, Mar, Apr, Oct, Nov, Dec
The weakest weather of the year: too hot, too cold or too wet.
Highs 0°C to 11°C · 8–13 rain days
Weather by month
Average highs and lows, rain days, sunshine and our month score out of 10.
| Month | High / low | Rain days | Sunshine | Score |
|---|---|---|---|---|
| January | 0°C / -5°C | 12 days (73 mm) | 2.7 h/day | 0.7/10 |
| February | 2°C / -4°C | 11 days (60 mm) | 4.7 h/day | 1.3/10 |
| March | 5°C / -2°C | 9 days (58 mm) | 7.1 h/day | 2.1/10 |
| April | 11°C / 2°C | 8 days (50 mm) | 10.3 h/day | 3.3/10 |
| May | 17°C / 7°C | 12 days (78 mm) | 11.7 h/day | 4.7/10 |
| June | 21°C / 12°C | 12 days (86 mm) | 13.1 h/day | 6.0/10 |
| Best month: July | 22°C / 14°C | 13 days (112 mm) | 12.5 h/day | 6.6/10 |
| Best month: August | 20°C / 13°C | 13 days (94 mm) | 10.5 h/day | 6.4/10 |
| September | 17°C / 10°C | 11 days (102 mm) | 7.5 h/day | 4.9/10 |
| October | 10°C / 5°C | 12 days (83 mm) | 4.8 h/day | 2.0/10 |
| November | 5°C / 1°C | 12 days (80 mm) | 2.6 h/day | 0.7/10 |
| December | 1°C / -3°C | 13 days (67 mm) | 1.9 h/day | 0.4/10 |
Figures for Oslo; the country's best months are weighted across its cities. Best months are highlighted. How we score months
Month by month
0°C / -5°C · 12 rain days · 2.7 h sun
Oslo sits around 0°C by day and drops to -5.3°C at night, with about 12 rain or snow days and just 2.7 hours of sun. The score is 0.7, rated avoid. New Year's Day opens the month. This is dark, cold weather, good for snow activities but hard for sightseeing.
2°C / -4°C · 11 rain days · 4.7 h sun
Daytime highs reach 1.7°C and nights stay near -4.2°C, with 10.7 wet days and 4.7 hours of sun. The verdict is avoid, scoring 1.3. Days are getting longer but it is still a cold, low-light month.
5°C / -2°C · 9 rain days · 7.1 h sun
Highs climb to 5.2°C and lows sit at -2.2°C, with 9.3 rain days and 7.1 hours of sun. The score of 2.1 keeps this an avoid month. Snow can still linger, making it a transitional, unsettled period.
11°C / 2°C · 8 rain days · 10.3 h sun
Temperatures reach 10.8°C by day but can fall to 1.5°C at night, with 8.2 rain days and 10.3 hours of sun. The score is 3.3, rated avoid. Easter falls this month in 2026, with Maundy Thursday through Easter Monday, bringing crowds and closures around the holiday.
17°C / 7°C · 12 rain days · 11.7 h sun
Highs hit 16.5°C with lows of 7°C, though rain picks up to 12.2 days and 78mm. The score rises to 4.7, an ok month. Labour Day, Ascension Day and Constitution Day on May 17 all fall in May, making it a lively month for holidays despite the rain.
21°C / 12°C · 12 rain days · 13.1 h sun
Daytime highs reach 21°C and nights stay mild at 12.1°C, with 11.7 rain days and 13.1 hours of sun, the sunniest month on record here. The score of 6 marks this a good month. Pentecost and Whit Monday land in late May or June depending on the year.
22°C / 14°C · 13 rain days · 12.5 h sun
This is the warmest month, with highs of 21.7°C and lows of 13.5°C, though rain also peaks at 13.1 days and 112mm. The score of 6.6 is the highest of the year, rated good. Expect occasional wet spells even during the warm, bright peak of summer.
20°C / 13°C · 13 rain days · 10.5 h sun
Highs stay warm at 20.4°C with lows of 12.8°C, and rain remains frequent at 12.6 days and 94mm. The score of 6.4 keeps this a good month. Sun hours drop slightly to 10.5 as the season starts to turn.
17°C / 10°C · 11 rain days · 7.5 h sun
Temperatures cool to 16.6°C by day and 10.1°C at night, with 11.3 rain days and 102mm of rain. The score falls to 4.9, an ok month. Daylight shortens quickly and autumn colours begin to appear.
10°C / 5°C · 12 rain days · 4.8 h sun
Highs drop to 10.1°C and lows to 5.1°C, with 11.6 rain days and 4.8 hours of sun. The score of 2 marks this an avoid month. Shorter days and steady rain make this a quieter, grayer stretch.
5°C / 1°C · 12 rain days · 2.6 h sun
Daytime highs reach only 4.7°C, with lows of 0.7°C, 12.1 rain days and just 2.6 hours of sun. The score of 0.7 is rated avoid. Darkness sets in early, with cold, damp conditions through the month.
1°C / -3°C · 13 rain days · 1.9 h sun
The coldest, darkest month: highs of 1.2°C, lows of -3.1°C, 13 rain or snow days and only 1.9 hours of sun. The score of 0.4 is the lowest of the year, rated avoid. Christmas Day and St. Stephen's Day bring holiday closures, and it's a month for those seeking snow, dark skies or northern lights rather than mild weather.
Regional differences
Average daytime high each month, coloured by that city's own month score.
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oslo | 0°C | 2°C | 5°C | 11°C | 17°C | 21°C | 22°C | 20°C | 17°C | 10°C | 5°C | 1°C |
| Bergen | 3°C | 4°C | 6°C | 9°C | 14°C | 17°C | 17°C | 17°C | 15°C | 10°C | 6°C | 4°C |
| Trondheim | 0°C | 1°C | 4°C | 8°C | 13°C | 17°C | 18°C | 18°C | 14°C | 9°C | 4°C | 1°C |
| Bodø | -1°C | 0°C | 2°C | 5°C | 10°C | 14°C | 17°C | 16°C | 13°C | 7°C | 2°C | 0°C |
| Tromsø | -4°C | -3°C | -1°C | 3°C | 8°C | 13°C | 17°C | 16°C | 11°C | 5°C | 0°C | -2°C |
Best Good OK Tough weather
By trip type
City sightseeing
July and August are the best months for city trips in Oslo. Highs reach 21.7°C in July and 20.4°C in August, with 12.5 and 10.5 sun hours a day, making it comfortable for walking and sightseeing.
Beach
July and August suit beach time best. July highs of 21.7°C and August highs of 20.4°C are Oslo's warmest, though rain days stay around 13 and 13 mm climbs to 112mm in July, so showers are common.
Hiking & nature
July and August are best for hiking, with daytime highs of 21.7°C and 20.4°C and mild lows of 13.5°C and 12.8°C, giving the warmest, longest days of the year for trails.
Events calendar
Public holidays: New Year's Day (1 Jan)
Public holidays: Maundy Thursday (2 Apr), Good Friday (3 Apr), Easter Sunday (5 Apr), Easter Monday (6 Apr)
Public holidays: Labour Day (1 May), Ascension Day (14 May), Constitution Day (17 May), Pentecost (24 May), Whit Monday (25 May)
Public holidays: Christmas Day (25 Dec), St. Stephen's Day (26 Dec)
Keep planning
FAQ
Yes, July is one of the two best months to visit Norway. Oslo's average high is 21.7°C and the low is 13.5°C, the warmest combination of the year. There's a trade-off: July also has 13.1 rain days and 112mm of rain, the highest monthly rainfall, so pack a waterproof layer even in summer.
Yes, August scores 6.4 out of the year's months and is rated good along with July. Oslo sees a high of 20.4°C and a low of 12.8°C, with sun hours dropping slightly to 10.5 from July's 12.5. Rain is still common, with 12.6 rain days and 94mm, so August stays warm but noticeably wetter than a dry-season month.
September is rated 'ok', scoring 4.9, a step down from summer. Oslo's high falls to 16.6°C and the low to 10.1°C, while sun hours drop to 7.5 from August's 10.5. Rainfall rises to 102mm over 11.3 days, so September brings cooler, greyer conditions than the July–August peak.
Winter scores lowest on the year's scale: December gets 0.4 and January 0.7, both rated 'avoid' for general sightseeing. Oslo's high barely clears freezing, at 1.2°C in December and 0°C in January, with lows of -3.1°C and -5.3°C. Sun hours drop to 1.9 and 2.7, the darkest months, which also makes this the season for polar night and northern lights.
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