Weather by month for Oslo, the best months to go and how Norway's regions differ, scored from 10 years of climate data.
Jun, Aug
The highest month scores: comfortable temperatures, little rain and plenty of sun.
Highs 20°C to 21°C · 12–13 rain days
May, Jul, Sep
Still good weather, just not quite the top months.
Highs 17°C to 22°C · 11–13 rain days
Jan, Feb, Mar, Oct, Nov, Dec
The weakest weather of the year: too hot, too cold or too wet.
Highs 0°C to 10°C · 9–13 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 | 1.3/10 |
| February | 2°C / -4°C | 11 days (60 mm) | 4.7 h/day | 2.0/10 |
| March | 5°C / -2°C | 9 days (58 mm) | 7.1 h/day | 2.9/10 |
| April | 11°C / 2°C | 8 days (50 mm) | 10.3 h/day | 4.8/10 |
| May | 17°C / 7°C | 12 days (78 mm) | 11.7 h/day | 6.8/10 |
| Best month: June | 21°C / 12°C | 12 days (86 mm) | 13.1 h/day | 7.7/10 |
| July | 22°C / 14°C | 13 days (112 mm) | 12.5 h/day | 7.4/10 |
| Best month: August | 20°C / 13°C | 13 days (94 mm) | 10.5 h/day | 7.5/10 |
| September | 17°C / 10°C | 11 days (102 mm) | 7.5 h/day | 6.9/10 |
| October | 10°C / 5°C | 12 days (83 mm) | 4.8 h/day | 2.9/10 |
| November | 5°C / 1°C | 12 days (80 mm) | 2.6 h/day | 1.2/10 |
| December | 1°C / -3°C | 13 days (67 mm) | 1.9 h/day | 0.9/10 |
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
In Oslo, January highs are around 0°C and lows are about -5°C. Expect 11.8 rain days and only 2.7 hours of sunshine. It scores 1.3, so our verdict is avoid. It is cold, grey and short on daylight, which makes it a poor month for sightseeing.
2°C / -4°C · 11 rain days · 4.7 h sun
February is still cold in Oslo, with highs of 1.7°C and lows of -4.2°C. There are about 10.7 rain days and 4.7 hours of sunshine. It scores 2, so our verdict is avoid. The light is slowly returning, but it is still too cold and dark for most trips.
5°C / -2°C · 9 rain days · 7.1 h sun
Highs in Oslo climb to 5.2°C in March, but lows stay below freezing at -2.2°C. Rain days drop to 9.3, and sunshine rises to 7.1 hours. It scores 2.9, so our verdict is still avoid. Nights are cold and it is not yet mild enough to enjoy time outdoors.
11°C / 2°C · 8 rain days · 10.3 h sun
April brings highs of 10.8°C and lows of 1.5°C in Oslo. It has the fewest rain days of the year, at 8.2, and the least rain, at 50 mm. Sunshine reaches 10.3 hours. It scores 4.8, so our verdict is ok. Pack warm layers, because it is still cool.
17°C / 7°C · 12 rain days · 11.7 h sun
May is a clear step up, with Oslo highs of 16.5°C and lows of 7°C. You get 11.7 hours of sunshine, though rain days rise to 12.2. It scores 6.8, so our verdict is good. It is a sensible choice if you want mild weather before the peak months.
21°C / 12°C · 12 rain days · 13.1 h sun
June has the top score of the year, 7.7, so our verdict is best. Oslo highs reach 21°C and lows are 12.1°C. It gets the most sunshine of any month, at 13.1 hours. There are still about 11.7 rain days, so bring a rain jacket.
22°C / 14°C · 13 rain days · 12.5 h sun
July is the warmest month in Oslo, with highs of 21.7°C and lows of 13.5°C. It is also the wettest, with 112 mm of rain over 13.1 rain days. Sunshine is still strong at 12.5 hours. It scores 7.4, so our verdict is good. Plan some indoor options for wet days.
20°C / 13°C · 13 rain days · 10.5 h sun
August stays warm in Oslo, with highs of 20.4°C and lows of 12.8°C. Expect about 12.6 rain days and 10.5 hours of sunshine. It scores 7.5, so our verdict is best. It is a strong alternative to June if those dates do not work for you.
17°C / 10°C · 11 rain days · 7.5 h sun
September cools to highs of 16.6°C and lows of 10.1°C in Oslo. It is wet, with 102 mm of rain over 11.3 rain days, and sunshine falls to 7.5 hours. It scores 6.9, so our verdict is good. Go early in the month if you can, and pack for rain.
10°C / 5°C · 12 rain days · 4.8 h sun
October is a poor time to visit. Oslo highs drop to 10.1°C and lows to 5.1°C. There are 11.6 rain days and only 4.8 hours of sunshine. It scores 2.9, so our verdict is avoid. The days feel wet, dark and cool.
5°C / 1°C · 12 rain days · 2.6 h sun
November is one of the worst months to go. Oslo highs are just 4.7°C and lows are 0.7°C. There are 12.1 rain days and only 2.6 hours of sunshine. It scores 1.2, so our verdict is avoid, because it is cold, wet and very dark.
1°C / -3°C · 13 rain days · 1.9 h sun
December has the lowest score of the year, 0.9, so our verdict is avoid. Oslo highs are 1.2°C and lows are -3.1°C. It has the most rain days, at 13, and the least sunshine, at 1.9 hours. Expect cold, gloomy weather and little daylight.
By trip type
City sightseeing
June and August suit city trips best, based on Oslo data. June averages highs of 21°C and 13.1 sun hours. August is similar at 20.4°C, but expect about 12.6 rain days and 94 mm of rain.
Hiking & nature
May and June suit hiking best. In Oslo, May has mild highs of 16.5°C, lows of 7°C and 78 mm of rain. June is warmer at 21°C and has the most sun, 13.1 hours, but more rain at 86 mm.
Keep planning
FAQ
June and August are the best months, based on Oslo climate data from 2015–2024. June scores 7.7 out of 10, with highs of 21°C and an average of 13.1 sun hours. August scores 7.5, with highs of 20.4°C and lows of 12.8°C. Both months still have about 12 rain days, so pack a rain jacket. Note that this data is for Oslo only, and other parts of Norway can be very different.
Yes, July is a good month, but it is not the best one. It scores 7.4 and is the warmest month in Oslo, with highs of 21.7°C. It is also the wettest month, with 112 mm of rain on 13.1 days. If you want warm weather with a little less rain, choose June or August.
Yes, September is a good month, with a score of 6.9. In Oslo, days are still mild, with highs of 16.6°C and lows of 10.1°C. But it is wet, with 102 mm of rain on 11.3 days. Sun drops to 7.5 hours, from 10.5 in August. Things get much worse in October, which scores only 2.9.
Not if you want pleasant weather. The data rates both months as ones to avoid. December scores 0.9 and has only 1.9 sun hours, with 13 rain days. January scores 1.3, with a high of 0°C and a low of -5.3°C in Oslo. November to March all score below 3, so choose May to September instead.
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