Helsinki climate guide

Temperature in Helsinki (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
-4°C maximum daytime temperature in January in Helsinki-4
-3°C maximum daytime temperature in February in Helsinki-3
1°C maximum daytime temperature in March in Helsinki1
7°C maximum daytime temperature in April in Helsinki7
15°C maximum daytime temperature in May in Helsinki15
19°C maximum daytime temperature in June in Helsinki19
21°C maximum daytime temperature in July in Helsinki21
20°C maximum daytime temperature in August in Helsinki20
14°C maximum daytime temperature in September in Helsinki14
9°C maximum daytime temperature in October in Helsinki9
3°C maximum daytime temperature in November in Helsinki3
-1°C maximum daytime temperature in December in Helsinki-1
Min temperature (night-time)
-10°C minimum night-time temperature in January in Helsinki-10
-10°C minimum night-time temperature in February in Helsinki-10
-6°C minimum night-time temperature in March in Helsinki-6
-1°C minimum night-time temperature in April in Helsinki-1
5°C minimum night-time temperature in May in Helsinki5
10°C minimum night-time temperature in June in Helsinki10
12°C minimum night-time temperature in July in Helsinki12
11°C minimum night-time temperature in August in Helsinki11
7°C minimum night-time temperature in September in Helsinki7
3°C minimum night-time temperature in October in Helsinki3
-2°C minimum night-time temperature in November in Helsinki-2
-7°C minimum night-time temperature in December in Helsinki-7
Sea temperature
1°C sea temperature in January in Helsinki1
-1°C sea temperature in February in Helsinki-1
-1°C sea temperature in March in Helsinki-1
0°C sea temperature in April in Helsinki0
5°C sea temperature in May in Helsinki5
10°C sea temperature in June in Helsinki10
12°C sea temperature in July in Helsinki12
16°C sea temperature in August in Helsinki16
14°C sea temperature in September in Helsinki14
9°C sea temperature in October in Helsinki9
6°C sea temperature in November in Helsinki6
3°C sea temperature in December in Helsinki3

Sunshine & Daylight in Helsinki

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
7 hours of daylight per day in January in Helsinki7
9 hours of daylight per day in February in Helsinki9
12 hours of daylight per day in March in Helsinki12
15 hours of daylight per day in April in Helsinki15
17 hours of daylight per day in May in Helsinki17
19 hours of daylight per day in June in Helsinki19
18 hours of daylight per day in July in Helsinki18
16 hours of daylight per day in August in Helsinki16
13 hours of daylight per day in September in Helsinki13
10 hours of daylight per day in October in Helsinki10
7 hours of daylight per day in November in Helsinki7
6 hours of daylight per day in December in Helsinki6

Rainfall in Helsinki

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
20 days with some rainfall in January in Helsinki20
17 days with some rainfall in February in Helsinki17
16 days with some rainfall in March in Helsinki16
13 days with some rainfall in April in Helsinki13
10 days with some rainfall in May in Helsinki10
11 days with some rainfall in June in Helsinki11
14 days with some rainfall in July in Helsinki14
16 days with some rainfall in August in Helsinki16
17 days with some rainfall in September in Helsinki17
17 days with some rainfall in October in Helsinki17
21 days with some rainfall in November in Helsinki21
22 days with some rainfall in December in Helsinki22
Average monthly rainfall (mm)
43 mm monthly rainfall in January in Helsinki43
33 mm monthly rainfall in February in Helsinki33
35 mm monthly rainfall in March in Helsinki35
37 mm monthly rainfall in April in Helsinki37
33 mm monthly rainfall in May in Helsinki33
42 mm monthly rainfall in June in Helsinki42
67 mm monthly rainfall in July in Helsinki67
77 mm monthly rainfall in August in Helsinki77
73 mm monthly rainfall in September in Helsinki73
72 mm monthly rainfall in October in Helsinki72
70 mm monthly rainfall in November in Helsinki70
58 mm monthly rainfall in December in Helsinki58

More climate for Helsinki

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
No UV (maximum) index in January in Helsinki0
No UV (maximum) index in February in Helsinki0
UV (maximum) index 1 (Low) in March in Helsinki1
UV (maximum) index 3 (Moderate) in April in Helsinki3
UV (maximum) index 4 (Moderate) in May in Helsinki4
UV (maximum) index 5 (Moderate) in June in Helsinki5
UV (maximum) index 5 (Moderate) in July in Helsinki5
UV (maximum) index 4 (Moderate) in August in Helsinki4
UV (maximum) index 3 (Moderate) in September in Helsinki3
UV (maximum) index 1 (Low) in October in Helsinki1
No UV (maximum) index in November in Helsinki0
No UV (maximum) index in December in Helsinki0
Heat & Humidity
No heat & humidity in January in Helsinki0
No heat & humidity in February in Helsinki0
No heat & humidity in March in Helsinki0
No heat & humidity in April in Helsinki0
No heat & humidity in May in Helsinki0
No heat & humidity in June in Helsinki0
No heat & humidity in July in Helsinki0
No heat & humidity in August in Helsinki0
No heat & humidity in September in Helsinki0
No heat & humidity in October in Helsinki0
No heat & humidity in November in Helsinki0
No heat & humidity in December in Helsinki0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

What's the climate like in Helsinki?

Helsinki has a cold climate with warm summers and some rainfall in all months.

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The climate guide for Finland (Helsinki) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Metric (°C / mm)  |  Imperial (°F / inches)

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