Helsinki weather in December
December in Helsinki: freezing, a little rain, with clean air — one of the weakest months to visit.
#11 of 12 months in Helsinki · #564 of 604 destinations to visit in December · comfort 32/100 (tier F)
Updated June 2026 · climate normals from ERA5 reanalysis
Helsinki climate normals — December
| Daytime high | 0°C / 31°F | 🥶 freezing |
|---|---|---|
| Nighttime low | -3°C / 26°F | |
| Feels like (high) | -5°C / 23°F | |
| Rainfall | 59 mm / 2.3 in | 🌦 some rain |
| Rainy days | 14 days | |
| Humidity | 90% | 💦 very humid |
| Dew point | -5°C / 24°F | |
| Sunshine | 0.6 h/day | |
| Daylight | 6 h | |
| Wind | 19 km/h / 12 mph | |
| Snowfall | 27.1 cm / 10.7 in | |
| Air quality (US AQI) | 27 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Helsinki in December — FAQ
- Is December a good time to visit Helsinki?
- December in Helsinki: freezing, a little rain, with clean air — one of the weakest months to visit. It ranks #11 of 12 months for Helsinki on SeasonMap's comfort score (32/100).
- What is the weather like in Helsinki in December?
- In December, Helsinki averages a daily high of -0.3°C and a low of -3.4°C, with about 59 mm of rain over roughly 13.8 rainy days.
- What is the air quality in Helsinki in December?
- Helsinki has a mean US Air Quality Index of about 27 in December.
- Does it snow in Helsinki in December?
- Helsinki sees roughly 27.1 cm of snowfall in December.