Finland · 30-year monthly climate averages
Based on 30 years of climate data, the most comfortable months to visit Helsinki are June, July and August, when daytime temperatures are agreeable and rainfall is relatively low.
Helsinki sees its warmest weather in July, when daytime highs average around 22°C, and its coolest in February (around -1°C).
Annual precipitation totals roughly 653mm — August is typically the wettest month (~81mm) and April the driest (~34mm).
Rainfall is spread fairly evenly through the year, so no single season is dramatically wetter than the rest.
🟧 avg daytime high · 🟦 dashed: avg nighttime low · bars: monthly rainfall
Daily forecast highs vs the 30-year normal — last 60 days
Each bar is one day: orange above normal, blue below.
| Month | High / Low | Rainfall | Travel rating |
|---|---|---|---|
| January | -1° / -6°C | 53mm | 🤔 Fair |
| February | -1° / -6°C | 38mm | 🤔 Fair |
| March | 2° / -4°C | 34mm | 🤔 Fair |
| April | 8° / 1°C | 34mm | 🤔 Fair |
| May | 15° / 6°C | 38mm | 👍 Good |
| June | 19° / 11°C | 60mm | 🌟 Great |
| July | 22° / 15°C | 57mm | 🌟 Great |
| August | 21° / 14°C | 81mm | 🌟 Great |
| September | 15° / 9°C | 56mm | 👍 Good |
| October | 9° / 4°C | 73mm | 🤔 Fair |
| November | 4° / 0°C | 69mm | 🤔 Fair |
| December | 1° / -3°C | 58mm | 🤔 Fair |
January in Helsinki is freezing, with daytime highs below zero, with average daytime highs around -1°C (31°F) and nighttime lows near -6°C (22°F). Expect roughly 53mm of precipitation spread over about 12 rainy days, with little rainfall.
🎒 What to pack — insulated winter coat · thermal layers · gloves and a warm hat
February in Helsinki is freezing, with daytime highs below zero, with average daytime highs around -1°C (30°F) and nighttime lows near -6°C (21°F). Expect roughly 38mm of precipitation spread over about 9 rainy days, with little rainfall.
🎒 What to pack — insulated winter coat · thermal layers · gloves and a warm hat
March in Helsinki is cold, with average daytime highs around 2°C (36°F) and nighttime lows near -4°C (26°F). Expect roughly 34mm of precipitation spread over about 8 rainy days, with little rainfall.
🎒 What to pack — warm coat · sweaters and layers · scarf
April in Helsinki is chilly, with average daytime highs around 8°C (47°F) and nighttime lows near 1°C (34°F). Expect roughly 34mm of precipitation spread over about 7 rainy days, with little rainfall.
🎒 What to pack — jacket or coat · long-sleeve layers
May in Helsinki is mild, with average daytime highs around 15°C (58°F) and nighttime lows near 6°C (44°F). Expect roughly 38mm of precipitation spread over about 7 rainy days, with little rainfall.
🎒 What to pack — light jacket · layers for cool evenings
June in Helsinki is mild, with average daytime highs around 19°C (66°F) and nighttime lows near 11°C (52°F). Expect roughly 60mm of precipitation spread over about 8 rainy days, with a moderate amount of rain.
🎒 What to pack — light jacket · layers for cool evenings
July in Helsinki is pleasantly warm, with average daytime highs around 22°C (71°F) and nighttime lows near 15°C (58°F). Expect roughly 57mm of precipitation spread over about 7 rainy days, with little rainfall.
🎒 What to pack — light layers · comfortable walking shoes
August in Helsinki is pleasantly warm, with average daytime highs around 21°C (69°F) and nighttime lows near 14°C (56°F). Expect roughly 81mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
🎒 What to pack — light layers · comfortable walking shoes
September in Helsinki is mild, with average daytime highs around 15°C (60°F) and nighttime lows near 9°C (49°F). Expect roughly 56mm of precipitation spread over about 9 rainy days, with little rainfall.
🎒 What to pack — light jacket · layers for cool evenings
October in Helsinki is chilly, with average daytime highs around 9°C (49°F) and nighttime lows near 4°C (40°F). Expect roughly 73mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
🎒 What to pack — jacket or coat · long-sleeve layers
November in Helsinki is cold, with average daytime highs around 4°C (40°F) and nighttime lows near 0°C (33°F). Expect roughly 69mm of precipitation spread over about 12 rainy days, with a moderate amount of rain.
🎒 What to pack — warm coat · sweaters and layers · scarf
December in Helsinki is cold, with average daytime highs around 1°C (35°F) and nighttime lows near -3°C (27°F). Expect roughly 58mm of precipitation spread over about 11 rainy days, with little rainfall.
🎒 What to pack — warm coat · sweaters and layers · scarf