Oslo in May
6.4out of 10
Possible, with caveats
Cool: highs only around 15°C. Frequent rain: about 11 rainy days.
15°CAvg high
5°CAvg low
11Rainy days (77 mm)
16:48 hDaylight
04:49Sunrise · 21:37 Sunset
Why this score
- Cool: highs only around 15°C
- Frequent rain: about 11 rainy days
- Rain varies a lot between years (±4.7 days)
What to wear and pack
- Layers you can add or remove
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in May varies a lot between years (±4.7 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -2°C | -7°C | 72 mm | 11 | – | – | 3.6 |
| February | -1°C | -7°C | 52 mm | 9 | – | – | 3.9 |
| March | 4°C | -4°C | 53 mm | 8 | – | – | 4.7 |
| April | 9°C | 0°C | 56 mm | 9 | – | – | 5.7 |
| May | 15°C | 5°C | 77 mm | 11 | – | – | 6.4 |
| June | 19°C | 9°C | 95 mm | 12 | – | – | 6.8 |
| July | 21°C | 12°C | 101 mm | 13 | – | – | 7.1 |
| August | 20°C | 11°C | 112 mm | 15 | – | – | 6.6 |
| September | 15°C | 7°C | 89 mm | 11 | – | – | 6.5 |
| October | 9°C | 3°C | 94 mm | 11 | – | – | 5.3 |
| November | 3°C | -1°C | 92 mm | 12 | – | – | 4.2 |
| December | -1°C | -5°C | 71 mm | 11 | – | – | 3.6 |
Frequently asked questions
How hot is Oslo in May?
Daytime highs average 15°C and nights about 5°C.
When is the best time to visit Oslo?
The best months are July, June, August, September.