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Helsinki Weather by Month

Twelve months of Helsinki, Finland weather — averages from 2006–2025.

Helsinki's warmest month is July (average high 21.1°C (70°F)) and the coolest is February (-2.1°C (28.2°F)). The most rain falls in August (about 84 mm), and March is the driest (about 40 mm). June is the sunniest, with about 14.1 hours of sunshine a day.

Best months to visit Helsinki

  1. #1MayGood
  2. #2JuneGood
  3. #3JulyGood

Ranked within Helsinki's own year by temperature comfort, rainy days and sunshine — historical averages, not a forecast.

Helsinki month by month

January

Poor

High -1.7°C (28.9°F)
Low -5.8°C (21.6°F)

Rainfall
59 mm (2.3 in)
Rainy days
13 rainy days
Sunshine
1.5 h sunshine / day
January

February

Poor

High -2.1°C (28.2°F)
Low -6.3°C (20.7°F)

Rainfall
48 mm (1.9 in)
Rainy days
10 rainy days
Sunshine
3.3 h sunshine / day
February

March

Poor

High 1.5°C (34.7°F)
Low -3.9°C (25°F)

Rainfall
40 mm (1.6 in)
Rainy days
10 rainy days
Sunshine
7 h sunshine / day
March

April

Fair

High 7.2°C (45°F)
Low 0.5°C (32.9°F)

Rainfall
42 mm (1.7 in)
Rainy days
10 rainy days
Sunshine
10 h sunshine / day
April

May

Good

High 13.6°C (56.5°F)
Low 6.3°C (43.3°F)

Rainfall
50 mm (2 in)
Rainy days
10 rainy days
Sunshine
12.8 h sunshine / day
May

June

Good

High 18.3°C (64.9°F)
Low 11.5°C (52.7°F)

Rainfall
65 mm (2.6 in)
Rainy days
11 rainy days
Sunshine
14.1 h sunshine / day
June

July

Good

High 21.1°C (70°F)
Low 14.8°C (58.6°F)

Rainfall
73 mm (2.9 in)
Rainy days
12 rainy days
Sunshine
13.7 h sunshine / day
July

August

Good

High 19.9°C (67.8°F)
Low 14.1°C (57.4°F)

Rainfall
84 mm (3.3 in)
Rainy days
14 rainy days
Sunshine
11.4 h sunshine / day
August

September

Good

High 15.2°C (59.4°F)
Low 10.4°C (50.7°F)

Rainfall
68 mm (2.7 in)
Rainy days
12 rainy days
Sunshine
8.3 h sunshine / day
September

October

Fair

High 8.9°C (48°F)
Low 5°C (41°F)

Rainfall
74 mm (2.9 in)
Rainy days
12 rainy days
Sunshine
4.8 h sunshine / day
October

November

Poor

High 4.3°C (39.7°F)
Low 1.2°C (34.2°F)

Rainfall
68 mm (2.7 in)
Rainy days
13 rainy days
Sunshine
2 h sunshine / day
November

December

Poor

High 1.1°C (34°F)
Low -2.4°C (27.7°F)

Rainfall
65 mm (2.6 in)
Rainy days
14 rainy days
Sunshine
1.3 h sunshine / day
December
Full 20-year climate guide for HelsinkiCharts, the monthly averages table and packing tips

More Finland cities by month

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Weather by month

Based on 20 years of historical weather data (2006–2025) from Open-Meteo. Monthly averages, not a forecast.