Oslo weather in May
May in Oslo: cool, rainy, with clean air — an excellent time to visit.
#4 of 12 months in Oslo · #326 of 604 destinations to visit in May · comfort 81/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Oslo climate normals — May
| Daytime high | 15°C / 59°F | 🙂 cool |
|---|---|---|
| Nighttime low | 6°C / 42°F | |
| Feels like (high) | 13°C / 55°F | |
| Rainfall | 82 mm / 3.2 in | 🌧 rainy |
| Rainy days | 12 days | |
| Humidity | 64% | 💧 humid |
| Dew point | 4°C / 39°F | |
| Sunshine | 11.6 h/day | |
| Daylight | 17.2 h | |
| Wind | 14 km/h / 9 mph | |
| Snowfall | 2.9 cm / 1.1 in | |
| Air quality (US AQI) | 43 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Oslo in May — FAQ
- Is May a good time to visit Oslo?
- May in Oslo: cool, rainy, with clean air — an excellent time to visit. It ranks #4 of 12 months for Oslo on SeasonMap's comfort score (81/100).
- What is the weather like in Oslo in May?
- In May, Oslo averages a daily high of 15.2°C and a low of 5.7°C, with about 82 mm of rain over roughly 11.8 rainy days.
- What is the air quality in Oslo in May?
- Oslo has a mean US Air Quality Index of about 43 in May.
- Does it snow in Oslo in May?
- Oslo sees roughly 2.9 cm of snowfall in May.