Capital city in Uusimaa, Finland
Helsinki weather by month and the best time to visit
When to go to Helsinki
June–Aug is bright and warm; midsummer weekend (late June) empties the city. Dec has Christmas markets; Jan–Feb is cold and dark.
Helsinki weather by month
Average daily high, rainfall and conditions.
- Jan-2°56 mm
- Feb-2°45 mm
- Mar0°42 mm
- Apr5°40 mm
- May11°48 mm
- Jun16°66 mm
- Jul19°59 mm
- Aug19°71 mm
- Sep15°63 mm
- Oct9°80 mm
- Nov4°75 mm
- Dec1°67 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | -2°C29°F | -5°C24°F | 56 mm | 93% | Freezing |
| February | -2°C28°F | -6°C22°F | 45 mm | 94% | Freezing |
| March | 0°C32°F | -4°C26°F | 42 mm | 90% | Freezing |
| April | 5°C41°F | 1°C33°F | 40 mm | 85% | Cold |
| May | 11°C52°F | 6°C43°F | 48 mm | 81% | Cool |
| June | 16°C60°F | 11°C52°F | 66 mm | 81% | Cool |
| July | 19°C67°F | 16°C60°F | 59 mm | 81% | Pleasant |
| August | 19°C66°F | 15°C60°F | 71 mm | 80% | Pleasant |
| September | 15°C59°F | 12°C53°F | 63 mm | 83% | Cool |
| October | 9°C48°F | 6°C43°F | 80 mm | 87% | Cold |
| November | 4°C40°F | 2°C36°F | 75 mm | 90% | Cold |
| December | 1°C34°F | -2°C29°F | 67 mm | 92% | Freezing |
Best months across Finland
Quick answers
What is the best month to visit Helsinki?
May–Sep. June–Aug is bright and warm; midsummer weekend (late June) empties the city. Dec has Christmas markets; Jan–Feb is cold and dark.
When is the rainy season in Helsinki?
Rain peaks in October with about 80 mm. No month averages 150 mm or more.
What is the hottest month in Helsinki?
July, with average highs of 19°C (67°F).
How cold does Helsinki get?
The coolest nights are in February, averaging -6°C (22°F).
More about Helsinki
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Sources
- NASA POWER climatology (2001–2020)
- HSL (Helsinki Region Transport)
- Finavia Helsinki Airport
- My Helsinki
- HUS
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.