Helsinki: Weather Guide & Climate
Complete month-by-month weather guide: Helsinki. Best time to visit: May, June, July, August, September. Plan your trip with detailed climate data.
Climate Overview
Helsinki has a cool climate with average yearly highs of 11°C, lows of 5°C, and approximately 13 rainy days per month.
The best time to visit Helsinki is during May, June, July, August, September, when weather is pleasant and ideal for outdoor activities
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Air Quality
Best Time
May, Jun, Jul, Aug, Sep
Hottest
Coldest
Driest Month
Forecast for your trip dates
Up to 16 days ahead| Month | High | Low | Rainy days | Condition |
|---|---|---|---|---|
| January | 4°C | 0°C | 15 | Wet |
| February | 3°C | -1°C | 12 | Good |
| March | 4°C | -1°C | 11 | Good |
| April | 8°C | 0°C | 10 | Good |
| May | 12°C | 5°C | 12 | Excellent (best) |
| June | 20°C | 13°C | 9 | Excellent (best) |
| July | 19°C | 13°C | 16 | Excellent (best) |
| August | 20°C | 13°C | 12 | Excellent (best) |
| September | 16°C | 11°C | 13 | Excellent (best) |
| October | 11°C | 7°C | 16 | Wet |
| November | 7°C | 3°C | 17 | Wet |
| December | 3°C | 0°C | 13 | Wet |
Weather data: Open-Meteo Archive (2020-2025) • Open-Meteo.com (CC BY 4.0) • Historical avg. 2020–2025
Weather by Season
Winter
Dec–Feb
High: 3°C
Low: 0°C
Rainy days: 13 days/month
Spring
Mar–May
High: 8°C
Low: 1°C
Rainy days: 11 days/month
Summer
Jun–Aug
High: 20°C
Low: 13°C
Rainy days: 12 days/month
Autumn
Sep–Nov
High: 11°C
Low: 7°C
Rainy days: 15 days/month
Month-by-Month Weather Table
January
February
March
April
May
BestJune
BestJuly
BestAugust
BestSeptember
BestOctober
November
December
| Month | High | Low | Rainy days | Condition | View Details |
|---|---|---|---|---|---|
| January | 4°C | 0°C | 15 | Wet | View Details → |
| February | 3°C | -1°C | 12 | Good | View Details → |
| March | 4°C | -1°C | 11 | Good | View Details → |
| April | 8°C | 0°C | 10 | Good | View Details → |
| May (best) | 12°C | 5°C | 12 | Excellent | View Details → |
| June (best) | 20°C | 13°C | 9 | Excellent | View Details → |
| July (best) | 19°C | 13°C | 16 | Excellent | View Details → |
| August (best) | 20°C | 13°C | 12 | Excellent | View Details → |
| September (best) | 16°C | 11°C | 13 | Excellent | View Details → |
| October | 11°C | 7°C | 16 | Wet | View Details → |
| November | 7°C | 3°C | 17 | Wet | View Details → |
| December | 3°C | 0°C | 13 | Wet | View Details → |
Helsinki
Design district with Helsinki Cathedral & Senate Square and Design District shopping, saunas, Art Nouveau architecture, and Baltic Sea islands.
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Common Questions
What type of climate does Helsinki have?
Helsinki has a Cool climate with average yearly temperatures of 11°C (highs) and 5°C (lows).
When is the best time to visit Helsinki?
The best time to visit Helsinki is during May, June, July, August, September, when temperatures average around 12°C and conditions are ideal for sightseeing.
What are the hottest and coldest months in Helsinki?
The hottest month in Helsinki is June with average highs of 20°C, while the coldest is February with average lows of -1°C.
When is the rainy season in Helsinki?
Helsinki sees the most rain in November (17 rainy days), while June is the driest month (9 rainy days).
More Helsinki Guides
Best Time to Visit
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Things to Do
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Itineraries
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Overview
Complete travel guide for Helsinki: top things to do, itineraries, and typical costs.