Weather in Helsinki
Live weather and 7-day forecast for Helsinki, Finland, followed by what to expect in each month of the year.
Sunrise 08:17 Sunset 17:54 Daylight 9h 36m Sun times →
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7-day forecast
Forecast data from Open-Meteo
Climate in Helsinki: month by month
Averaged over 2023–2025, the warmest month in Helsinki is July, with highs around 21 °C (70 °F) and lows around 15 °C (58 °F); the coolest is January, with highs around -1 °C (31 °F) and lows around -6 °C (21 °F). Average lows fall below freezing in December–March.
Helsinki gets about 832 mm (33 in) of precipitation a year. The wettest month is August (94 mm over about 15 days) and the driest is May (29 mm).
| Month | Avg high | Avg low | Precipitation (mm) | Wet days | Daylight |
|---|---|---|---|---|---|
| January | -1° | -6° | 78 | 15 | 6h 39m |
| February | -1° | -5° | 51 | 10 | 9h 9m |
| March | 3° | -3° | 51 | 11 | 11h 42m |
| April | 8° | 1° | 59 | 10 | 14h 33m |
| May | 14° | 6° | 29 | 9 | 17h 9m |
| June | 19° | 11° | 56 | 11 | 18h 52m |
| July | 21° | 15° | 85 | 15 | 18h 9m |
| August | 20° | 14° | 94 | 15 | 15h 44m |
| September | 17° | 12° | 92 | 11 | 12h 57m |
| October | 10° | 5° | 87 | 12 | 10h 14m |
| November | 5° | 1° | 80 | 15 | 7h 33m |
| December | 2° | -3° | 70 | 15 | 5h 53m |
Averages of daily values from the ERA5 reanalysis for 2023–2025 at Helsinki's coordinates (model elevation 8 m), via Open-Meteo (CC BY 4.0). Three recent years are not a 30-year climate normal; reanalysis smooths local extremes and tends to count more light-rain days than a rain gauge would. Daylight is sunrise to sunset on the 15th of each month.
Weather questions for Helsinki
What is the hottest month in Helsinki?
July, with average highs of 21 °C (70 °F) and lows of 15 °C (58 °F) over 2023–2025. The coolest month is January, averaging -1 °C (31 °F) by day and -6 °C (21 °F) at night.
What is the rainiest month in Helsinki?
August, with about 94 mm of precipitation on roughly 15 days. The driest month is May (29 mm), and the yearly total is around 832 mm.
When is the weather mildest in Helsinki?
Going by the averages, June–August are the months with average daytime highs between 18 °C and 27 °C (64–81 °F) — warm but not hot. August is the month most likely to bring rain.
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About this forecast
The live forecast comes from Open-Meteo, which blends models from national weather services and is fetched fresh in your browser on each visit. Times in the hourly outlook are Helsinki local time (Europe/Helsinki).