Helsinki weather by month

Check out Helsinki weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Helsinki (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
25°F maximum daytime temperature in January in Helsinki25
27°F maximum daytime temperature in February in Helsinki27
34°F maximum daytime temperature in March in Helsinki34
45°F maximum daytime temperature in April in Helsinki45
59°F maximum daytime temperature in May in Helsinki59
66°F maximum daytime temperature in June in Helsinki66
70°F maximum daytime temperature in July in Helsinki70
68°F maximum daytime temperature in August in Helsinki68
57°F maximum daytime temperature in September in Helsinki57
48°F maximum daytime temperature in October in Helsinki48
37°F maximum daytime temperature in November in Helsinki37
30°F maximum daytime temperature in December in Helsinki30
Min temperature (night-time)
14°F minimum night-time temperature in January in Helsinki14
14°F minimum night-time temperature in February in Helsinki14
21°F minimum night-time temperature in March in Helsinki21
30°F minimum night-time temperature in April in Helsinki30
41°F minimum night-time temperature in May in Helsinki41
50°F minimum night-time temperature in June in Helsinki50
54°F minimum night-time temperature in July in Helsinki54
52°F minimum night-time temperature in August in Helsinki52
45°F minimum night-time temperature in September in Helsinki45
37°F minimum night-time temperature in October in Helsinki37
28°F minimum night-time temperature in November in Helsinki28
19°F minimum night-time temperature in December in Helsinki19
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
Sea temperature
34°F sea temperature in January in Helsinki34
30°F sea temperature in February in Helsinki30
30°F sea temperature in March in Helsinki30
32°F sea temperature in April in Helsinki32
41°F sea temperature in May in Helsinki41
50°F sea temperature in June in Helsinki50
54°F sea temperature in July in Helsinki54
61°F sea temperature in August in Helsinki61
57°F sea temperature in September in Helsinki57
48°F sea temperature in October in Helsinki48
43°F sea temperature in November in Helsinki43
37°F sea temperature in December in Helsinki37

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

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
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

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 (inches)
1.7 inches monthly rainfall in January in Helsinki1.7
1.3 inches monthly rainfall in February in Helsinki1.3
1.4 inches monthly rainfall in March in Helsinki1.4
1.5 inches monthly rainfall in April in Helsinki1.5
1.3 inches monthly rainfall in May in Helsinki1.3
1.7 inches monthly rainfall in June in Helsinki1.7
2.6 inches monthly rainfall in July in Helsinki2.6
3.0 inches monthly rainfall in August in Helsinki3.0
2.9 inches monthly rainfall in September in Helsinki2.9
2.8 inches monthly rainfall in October in Helsinki2.8
2.8 inches monthly rainfall in November in Helsinki2.8
2.3 inches monthly rainfall in December in Helsinki2.3

More about Helsinki

Helsinki by month

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

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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.

What's the climate like in Helsinki?

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

Metric (°C)  |  Imperial (°F)

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Compare Helsinki with the USA

Below the Helsinki chart shows average maximum daytime temperature for Helsinki, Finland and the USA (Washington).

Maximum daytime temperature (°F)

Helsinki, Finland
USA (Washington)
41
45
34
55
45
66
59
75
66
84
70
88
68
86
57
79
48
68
37
57
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
25
27
30

Metric (°C)  |  Imperial (°F)

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