Mariehamn weather by month

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

Temperature in Mariehamn (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
30°F maximum daytime temperature in January in Mariehamn30
28°F maximum daytime temperature in February in Mariehamn28
34°F maximum daytime temperature in March in Mariehamn34
43°F maximum daytime temperature in April in Mariehamn43
54°F maximum daytime temperature in May in Mariehamn54
63°F maximum daytime temperature in June in Mariehamn63
66°F maximum daytime temperature in July in Mariehamn66
64°F maximum daytime temperature in August in Mariehamn64
57°F maximum daytime temperature in September in Mariehamn57
48°F maximum daytime temperature in October in Mariehamn48
41°F maximum daytime temperature in November in Mariehamn41
34°F maximum daytime temperature in December in Mariehamn34
Min temperature (night-time)
19°F minimum night-time temperature in January in Mariehamn19
18°F minimum night-time temperature in February in Mariehamn18
23°F minimum night-time temperature in March in Mariehamn23
30°F minimum night-time temperature in April in Mariehamn30
39°F minimum night-time temperature in May in Mariehamn39
48°F minimum night-time temperature in June in Mariehamn48
54°F minimum night-time temperature in July in Mariehamn54
52°F minimum night-time temperature in August in Mariehamn52
45°F minimum night-time temperature in September in Mariehamn45
39°F minimum night-time temperature in October in Mariehamn39
32°F minimum night-time temperature in November in Mariehamn32
25°F minimum night-time temperature in December in Mariehamn25
Heat & Humidity
No heat & humidity in January in Mariehamn0
No heat & humidity in February in Mariehamn0
No heat & humidity in March in Mariehamn0
No heat & humidity in April in Mariehamn0
No heat & humidity in May in Mariehamn0
No heat & humidity in June in Mariehamn0
No heat & humidity in July in Mariehamn0
No heat & humidity in August in Mariehamn0
No heat & humidity in September in Mariehamn0
No heat & humidity in October in Mariehamn0
No heat & humidity in November in Mariehamn0
No heat & humidity in December in Mariehamn0
Sea temperature
36°F sea temperature in January in Mariehamn36
34°F sea temperature in February in Mariehamn34
32°F sea temperature in March in Mariehamn32
34°F sea temperature in April in Mariehamn34
41°F sea temperature in May in Mariehamn41
50°F sea temperature in June in Mariehamn50
59°F sea temperature in July in Mariehamn59
63°F sea temperature in August in Mariehamn63
55°F sea temperature in September in Mariehamn55
48°F sea temperature in October in Mariehamn48
43°F sea temperature in November in Mariehamn43
39°F sea temperature in December in Mariehamn39

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

Sunshine & Daylight in Mariehamn

  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 Mariehamn7
9 hours of daylight per day in February in Mariehamn9
12 hours of daylight per day in March in Mariehamn12
15 hours of daylight per day in April in Mariehamn15
17 hours of daylight per day in May in Mariehamn17
19 hours of daylight per day in June in Mariehamn19
18 hours of daylight per day in July in Mariehamn18
16 hours of daylight per day in August in Mariehamn16
13 hours of daylight per day in September in Mariehamn13
10 hours of daylight per day in October in Mariehamn10
7 hours of daylight per day in November in Mariehamn7
6 hours of daylight per day in December in Mariehamn6
UV Index (Maximum)
No UV (maximum) index in January in Mariehamn0
No UV (maximum) index in February in Mariehamn0
UV (maximum) index 1 (Low) in March in Mariehamn1
UV (maximum) index 3 (Moderate) in April in Mariehamn3
UV (maximum) index 4 (Moderate) in May in Mariehamn4
UV (maximum) index 5 (Moderate) in June in Mariehamn5
UV (maximum) index 5 (Moderate) in July in Mariehamn5
UV (maximum) index 4 (Moderate) in August in Mariehamn4
UV (maximum) index 3 (Moderate) in September in Mariehamn3
UV (maximum) index 1 (Low) in October in Mariehamn1
No UV (maximum) index in November in Mariehamn0
No UV (maximum) index in December in Mariehamn0

Rainfall in Mariehamn

  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 Mariehamn20
15 days with some rainfall in February in Mariehamn15
14 days with some rainfall in March in Mariehamn14
11 days with some rainfall in April in Mariehamn11
10 days with some rainfall in May in Mariehamn10
10 days with some rainfall in June in Mariehamn10
12 days with some rainfall in July in Mariehamn12
14 days with some rainfall in August in Mariehamn14
16 days with some rainfall in September in Mariehamn16
16 days with some rainfall in October in Mariehamn16
19 days with some rainfall in November in Mariehamn19
19 days with some rainfall in December in Mariehamn19
Average monthly rainfall (inches)
1.4 inches monthly rainfall in January in Mariehamn1.4
1.0 inches monthly rainfall in February in Mariehamn1.0
1.0 inches monthly rainfall in March in Mariehamn1.0
1.1 inches monthly rainfall in April in Mariehamn1.1
1.1 inches monthly rainfall in May in Mariehamn1.1
1.3 inches monthly rainfall in June in Mariehamn1.3
2.0 inches monthly rainfall in July in Mariehamn2.0
2.5 inches monthly rainfall in August in Mariehamn2.5
2.4 inches monthly rainfall in September in Mariehamn2.4
2.1 inches monthly rainfall in October in Mariehamn2.1
2.3 inches monthly rainfall in November in Mariehamn2.3
1.7 inches monthly rainfall in December in Mariehamn1.7

More about Mariehamn

Mariehamn by month

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

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The climate guide for Finland (Mariehamn) 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 Mariehamn?

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

Metric (°C)  |  Imperial (°F)

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Compare Mariehamn with the USA

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

Maximum daytime temperature (°F)

Mariehamn, Finland
USA (Washington)
41
45
34
55
43
66
54
75
63
84
66
88
64
86
57
79
48
68
41
57
34
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
30
28

Metric (°C)  |  Imperial (°F)

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