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📊 Monthly Climate Overview
| Month | Max °C | Min °C | Rain mm | Rain Days | Sun h | Wind km/h | Sea °C |
|---|---|---|---|---|---|---|---|
| Jan | -1.1°C | -5.3°C | 66.9 mm | 14 | 1.3 h | 23.9 km/h | -0.2°C |
| Feb | -0.2°C | -4.7°C | 59.2 mm | 12 | 3.4 h | 23.2 km/h | -0.2°C |
| Mar | 2.2°C | -3.3°C | 44 mm | 10 | 6.9 h | 22.6 km/h | 0.2°C |
| Apr | 7.5°C | 0.5°C | 38.2 mm | 9 | 10.5 h | 20.4 km/h | 3.2°C |
| May | 13.4°C | 5.9°C | 55.5 mm | 10 | 12.6 h | 19.9 km/h | 9.3°C |
| Jun | 18.5°C | 11.5°C | 62 mm | 11 | 14.3 h | 20.5 km/h | 15.7°C |
| Jul | 20.7°C | 14.2°C | 75.7 mm | 13 | 13.6 h | 19.3 km/h | 17.9°C |
| Aug | 19.9°C | 14°C | 90.2 mm | 13 | 11.1 h | 20.2 km/h | 18.6°C |
| Sep | 15.2°C | 10.1°C | 62.6 mm | 11 | 8.3 h | 20.9 km/h | 17.4°C |
| Oct | 8.8°C | 4.7°C | 76.2 mm | 12 | 4.6 h | 23.2 km/h | 9.8°C |
| Nov | 4.4°C | 1.1°C | 71.7 mm | 14 | 1.8 h | 23.5 km/h | 4.2°C |
| Dec | 1.1°C | -2.5°C | 65.2 mm | 14 | 1.3 h | 23.9 km/h | 0.3°C |
📖Climate & Best Time to Visit Helsinki
Helsinki (Finland) has a temperate climate with an annual average of around 7 °C. Daytime highs average 9 °C, while nights cool to about 4 °C. The destination sees roughly 767 mm of rainfall per year and 7.5 hours of sunshine per day on average.
Spring and autumn are ideal for a city break: June is the sunniest month with 14.3 hours of sun per day, and mild temperatures make exploring on foot comfortable. Peak summer (July, up to 20.7 °C) can get exhausting, while in January nights drop to -5.3 °C.
Note: with roughly 26 °C between the hottest and coldest month, picking the right time of year matters a lot here.
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Frequently asked questions about Helsinki
When is the best time to visit Helsinki?
The best time to visit Helsinki: May to September – best in June (avg. 15.0 °C, 11 rainy days). Based on the monthly values for 2014 to 2023.
What are the temperatures in Helsinki?
The warmest month is July with an average of 17.5 °C and daytime highs around 20.7 °C. The coldest month is January with an average of -3.2 °C and night-time lows around -5.3 °C.
How many rainy days does Helsinki have?
January has the most rainy days with 14 rainy days. The driest month is April with 9 rainy days.
What is the sea temperature near Helsinki?
The water is warmest in August at an average of 18.6 °C and coolest in January at -0.2 °C.