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 freezing in January, with a high of 0°C and lows near -5.3°C. Expect rain or snow on about 12 days, and only 2.7 hours of sun a day, so daylight is short and skies are often grey. This is a cold, dark month, good for snow activities but tough if you want long daylight or mild temperatures. New Year's Day falls on 1 January.
2°C / -4°C · 11 rain days · 4.7 h sun
Temperatures stay cold, with highs of 1.7°C and lows of -4.2°C, though sun hours rise slightly to 4.7 a day. Rain or snow falls on about 11 days. Winter conditions still dominate, so this month suits snow and ski plans rather than mild sightseeing.
5°C / -2°C · 9 rain days · 7.1 h sun
Highs climb to 5.2°C and lows to -2.2°C, with sun hours up to 7.1 a day and fewer rain days, around 9. It still feels like winter in Oslo, with snow and cold mornings common, but light is noticeably longer than midwinter.
11°C / 2°C · 8 rain days · 10.3 h sun
Daytime highs reach 10.8°C and lows turn positive at 1.5°C, with sun hours up to 10.3 and only 8.2 rain days, the driest month of the year. Easter falls in April in 2026, with Maundy Thursday on 2 April through Easter Monday on 6 April. Weather is improving but still cool and changeable, so pack layers.
17°C / 7°C · 12 rain days · 11.7 h sun
Highs reach 16.5°C and lows 7°C, with 11.7 hours of sun a day, though rain days rise to 12.2 with 78mm of rain. This month scores as an okay time to visit, with milder weather and long evenings. Labour Day is 1 May and Constitution Day, Norway's national day, is 17 May, bringing parades and celebrations.
21°C / 12°C · 12 rain days · 13.1 h sun
Summer arrives with highs of 21°C and lows of 12.1°C, and 13.1 hours of sunshine a day, among the best of the year. Rain still falls on about 11.7 days with 86mm total. This month scores well for a visit, with warm days and very long daylight hours. Ascension Day, Pentecost, and Whit Monday all fall in May or June depending on the year, with Whit Monday on 25 May in 2026.
22°C / 14°C · 13 rain days · 12.5 h sun
July is the warmest month, with highs of 21.7°C and lows of 13.5°C. It's also the wettest, with 112mm of rain spread over 13.1 days, so showers are common even in summer. Sun hours stay high at 12.5 a day. This is one of the best-scoring months to visit, combining warmth with long days despite the rain.
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 sun hours of 10.5 a day. Rain falls on about 12.6 days with 94mm total. This month continues the good summer run, with pleasant temperatures though rain is still frequent.
17°C / 10°C · 11 rain days · 7.5 h sun
Temperatures cool to a high of 16.6°C and low of 10.1°C, while rain increases to 102mm over 11.3 days. Sun hours drop to 7.5 a day. This month rates as okay, marking the shift from summer into autumn, with cooler air and more rain than midsummer.
10°C / 5°C · 12 rain days · 4.8 h sun
Highs fall to 10.1°C and lows to 5.1°C, with sun hours dropping sharply to 4.8 a day. Rain remains frequent, around 11.6 days and 83mm. Days get noticeably shorter and greyer, a tough month for sunshine seekers, though colours in nature can be striking.
5°C / 1°C · 12 rain days · 2.6 h sun
Highs drop to 4.7°C and lows to 0.7°C, with only 2.6 hours of sun a day, one of the darkest months. Rain or snow falls on about 12.1 days. This is a difficult month weather-wise, with little daylight and cold, damp conditions, though it can suit those chasing early snow or northern lights further north.
1°C / -3°C · 13 rain days · 1.9 h sun
December is the darkest month, with just 1.9 hours of sun a day, a high of 1.2°C and a low of -3.1°C. Rain or snow falls on about 13 days, the most of any month. Cold, dark conditions make this a tough time for general sightseeing, but Christmas markets and festive lights add charm. Christmas Day falls on 25 December and St. Stephen's Day on 26 December.
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 warmest months in Oslo, with average highs of 21.7°C and 20.4°C. Pack an umbrella. July is also the wettest month in the 2015–2024 data, with 112 mm of rain over 13.1 rain days.
Beach
For swimming and time on the shore, July and August give Oslo's warmest weather. Highs reach 21.7°C and 20.4°C, and nights stay mild at 13.5°C and 12.8°C. Showers are common, with 12.6 rain days in August.
Hiking & nature
July and August are the mildest months for walking, with lows of 13.5°C and 12.8°C and 12.5 and 10.5 sun hours. The trade-off is rain: 112 mm in July and 94 mm in August, so bring waterproof gear.
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 2 best months to visit, along with August. In Oslo, highs average 21.7°C and lows 13.5°C, the warmest of the year. It also gets 12.5 sun hours on average. Pack a rain jacket, though. July is also the wettest month, with 112 mm of rain over 13.1 rain days. These figures come from Oslo for 2015–2024.
Yes, August is one of the 2 best months, with weather close to July's. Oslo averages a high of 20.4°C and a low of 12.8°C. There are 10.5 sun hours on average. Rain is a little lower than in July, at 94 mm over 12.6 rain days. You should still expect some wet days.
September is a fair choice, though the weather is cooler and wetter than in summer. Oslo highs drop to 16.6°C and lows to 10.1°C. Sun falls to 7.5 hours on average, down from 10.5 in August. At 102 mm, September gets the second-highest rainfall of the year, spread over 11.3 rain days.
Winter is cold and dark. In January, Oslo highs average 0°C and lows -5.3°C. December has the least sun of the year, only 1.9 hours on average, and 13 rain days. February is still below freezing at night, with a low of -4.2°C. These months suit travellers who want short, dark winter days more than warm sightseeing weather.
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