Helsinki, Finland Climate & Monthly Averages
The climate of Helsinki
Weather in Helsinki is shaped by its humid continental climate - expect warm summers and cold, often snowy winters. July afternoons typically reach 69°F (20°C), while January highs hover near 30°F (-1°C). Annual precipitation averages 30.7 inches (781 mm) over about 144 rainy days.
Climate quick facts
- Hottest month: July - highs near 69°F (20°C)
- Coldest month: January - highs near 30°F (-1°C)
- Record high: 88°F (31°C) · Record low: -14°F (-26°C) (2015–2024)
- Wettest month: August (13 rainy days) · Sunniest: June (14.7 h sun/day)
- Climate type: humid continental - warm summers and cold, often snowy winters
- Snow: about 34 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 69°F (20°C) and overnight lows stay near 57°F (14°C). The coolest month is January, with typical highs of 30°F (-1°C) and lows around 22°F (-6°C). Based on 2015–2024 weather data, temperatures have reached as high as 88°F (31°C) and dropped as low as -14°F (-26°C).
Rain, sun and snow
August is usually the wettest month. It brings about 3.3 inches (83 mm) of rain over 13 days, while April is the driest. June brings the most sunshine, averaging 14.7 hours of sun a day. Snow falls on about 34 days in a typical year, mostly from November through April.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 30° | 22° | 14 | 2.7 in | 1.4 h/day | 86% |
| February | 31° | 23° | 12 | 2.5 in | 3.6 h/day | 86% |
| March | 35° | 26° | 11 | 1.8 in | 6.6 h/day | 83% |
| April | 45° | 33° | 10 | 1.8 in | 9.9 h/day | 76% |
| May | 57° | 43° | 9 | 1.9 in | 13.0 h/day | 70% |
| June | 66° | 53° | 10 | 2.2 in | 14.7 h/day | 70% |
| July | 69° | 57° | 13 | 3.1 in | 13.3 h/day | 76% |
| August | 68° | 57° | 13 | 3.3 in | 11.2 h/day | 79% |
| September | 60° | 51° | 11 | 2.7 in | 8.2 h/day | 81% |
| October | 48° | 40° | 13 | 3.1 in | 4.8 h/day | 84% |
| November | 40° | 34° | 14 | 3.1 in | 2.0 h/day | 87% |
| December | 34° | 28° | 14 | 2.6 in | 1.3 h/day | 87% |
Helsinki month by month
Helsinki weather in January
January brings highs around 30°F (-1°C), lows near 22°F (-6°C), about 14 wet days and roughly 9 snowy days - typically the coldest month of the year in Helsinki.
Helsinki weather in February
February brings highs around 31°F (0°C), lows near 23°F (-5°C), about 12 wet days and roughly 8 snowy days.
Helsinki weather in March
March brings highs around 35°F (2°C), lows near 26°F (-4°C), about 11 wet days and roughly 5 snowy days.
Helsinki weather in April
April brings highs around 45°F (7°C), lows near 33°F (0°C), about 10 wet days and roughly 2 snowy days - typically the driest month of the year in Helsinki.
Helsinki weather in May
May brings highs around 57°F (14°C), lows near 43°F (6°C), about 9 wet days.
Helsinki weather in June
June brings highs around 66°F (19°C), lows near 53°F (12°C), about 10 wet days - typically the sunniest month of the year in Helsinki.
Helsinki weather in July
July brings highs around 69°F (20°C), lows near 57°F (14°C), about 13 wet days - typically the hottest month of the year in Helsinki.
Helsinki weather in August
August brings highs around 68°F (20°C), lows near 57°F (14°C), about 13 wet days - typically the wettest month of the year in Helsinki.
Helsinki weather in September
September brings highs around 60°F (15°C), lows near 51°F (10°C), about 11 wet days.
Helsinki weather in October
October brings highs around 48°F (9°C), lows near 40°F (5°C), about 13 wet days.
Helsinki weather in November
November brings highs around 40°F (4°C), lows near 34°F (1°C), about 14 wet days and roughly 4 snowy days.
Helsinki weather in December
December brings highs around 34°F (1°C), lows near 28°F (-2°C), about 14 wet days and roughly 6 snowy days.
Seasons in Helsinki
Spring (March through May)
Spring in Helsinki is brisk and cold, with daytime highs averaging 46°F (8°C) and nights around 34°F (1°C); expect showers on roughly 30 days across the season, plus around 7 snowy days.
Summer (June through August)
Summer in Helsinki is crisp but comfortable, with daytime highs averaging 68°F (20°C) and nights around 56°F (13°C); expect showers on roughly 36 days across the season.
Fall (September through November)
Fall in Helsinki runs cold, with daytime highs averaging 49°F (10°C) and nights around 42°F (5°C); expect showers on roughly 38 days across the season, plus around 4 snowy days.
Winter (December through February)
Winter in Helsinki is bitterly cold, with daytime highs averaging 32°F (0°C) and nights around 24°F (-4°C); expect showers on roughly 40 days across the season, plus around 23 snowy days. Wind makes those temperatures feel harsher than they sound - pair the forecast winds with the wind speed converter to judge conditions on exposed skin.
Climate questions, answered
What is the average temperature in Helsinki?
Is Helsinki hot in summer?
Is Helsinki cold in winter?
How many rainy days does Helsinki get in a year?
Best time to visit Helsinki
The best time to visit Helsinki is generally May to September, when this window offers the warmest, brightest days of the year. Daytime temperatures in that window typically sit near 64°F (18°C).
Pack for Helsinki with a heavy insulated coat, hat and gloves for winter; a compact umbrella or rain shell - showers are a regular feature. Evenings can feel noticeably cooler than afternoons - July nights average 57°F (14°C).
Helsinki temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.