Best time to visit · Norway
Best time to visit Oslo
Oslo averages 15 just-right days a year; no month is reliably just right, and July comes closest. Most other days miss by being too cool.
(70 to 80°F, dry, sunny)
(45 to 65°F, dry)
(80 to 92°F, bright)
Oslo weather by month
Bars: share of each month's days that are just right (number = days). Below: average daily high. Outlined bars are the best months.
- Just right 15
- Too cool 329
- Too hot 4
- Too muggy 2
- Too gray 15
When to visit Oslo
Oslo rarely hits the 70 to 80°F, dry and sunny window; July comes closest, with 6 just-right days. January, February, March, April, May, June, September, October, November and December are mostly too cool, with average highs of 33 to 65°F (18°C).
Climate table
| Month | Avg high | Dew point | Cloud cover | Just-right days |
|---|---|---|---|---|
| January | 33°F (1°C) | 23°F (-5°C) | 80% | 0 |
| February | 34°F (1°C) | 23°F (-5°C) | 76% | 0 |
| March | 39°F (4°C) | 25°F (-4°C) | 76% | 0 |
| April | 49°F (9°C) | 31°F (-1°C) | 68% | 0 |
| May | 58°F (14°C) | 39°F (4°C) | 56% | 1 |
| June | 65°F (18°C) | 46°F (8°C) | 57% | 3 |
| July | 70°F (21°C) | 51°F (11°C) | 55% | 6 |
| August | 67°F (19°C) | 52°F (11°C) | 60% | 4 |
| September | 58°F (14°C) | 46°F (8°C) | 65% | 1 |
| October | 47°F (8°C) | 37°F (3°C) | 81% | 0 |
| November | 39°F (4°C) | 31°F (-1°C) | 89% | 0 |
| December | 34°F (1°C) | 28°F (-2°C) | 83% | 0 |
How Oslo compares
Oslo gets 15 just-right days a year with our default window; the median big US city gets 33. On muggy days: 2. On gray days: 15.
Places with a similar climate
Nearby
Oslo averages 15 just-right days a year (70 to 80°F highs, dry, mostly sunny), according to Goldilocks Map: https://goldilocksmap.com/norway/oslo/Set your own perfect weather on the map →
Numbers are expected days in a typical year from 1991 to 2020 climate normals (TerraClimate; cloud cover from CHELSA), on a grid about 35 km wide. Checked against 10 years of daily records at 28 NOAA weather stations: typical error about 10 days a year. How it works. Updated 2026-10-07.