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 (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
-1°C maximum daytime temperature in January in Mariehamn-1
-2°C maximum daytime temperature in February in Mariehamn-2
1°C maximum daytime temperature in March in Mariehamn1
6°C maximum daytime temperature in April in Mariehamn6
12°C maximum daytime temperature in May in Mariehamn12
17°C maximum daytime temperature in June in Mariehamn17
19°C maximum daytime temperature in July in Mariehamn19
18°C maximum daytime temperature in August in Mariehamn18
14°C maximum daytime temperature in September in Mariehamn14
9°C maximum daytime temperature in October in Mariehamn9
5°C maximum daytime temperature in November in Mariehamn5
1°C maximum daytime temperature in December in Mariehamn1
Min temperature (night-time)
-7°C minimum night-time temperature in January in Mariehamn-7
-8°C minimum night-time temperature in February in Mariehamn-8
-5°C minimum night-time temperature in March in Mariehamn-5
-1°C minimum night-time temperature in April in Mariehamn-1
4°C minimum night-time temperature in May in Mariehamn4
9°C minimum night-time temperature in June in Mariehamn9
12°C minimum night-time temperature in July in Mariehamn12
11°C minimum night-time temperature in August in Mariehamn11
7°C minimum night-time temperature in September in Mariehamn7
4°C minimum night-time temperature in October in Mariehamn4
0°C minimum night-time temperature in November in Mariehamn0
-4°C minimum night-time temperature in December in Mariehamn-4
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
2°C sea temperature in January in Mariehamn2
1°C sea temperature in February in Mariehamn1
0°C sea temperature in March in Mariehamn0
1°C sea temperature in April in Mariehamn1
5°C sea temperature in May in Mariehamn5
10°C sea temperature in June in Mariehamn10
15°C sea temperature in July in Mariehamn15
17°C sea temperature in August in Mariehamn17
13°C sea temperature in September in Mariehamn13
9°C sea temperature in October in Mariehamn9
6°C sea temperature in November in Mariehamn6
4°C sea temperature in December in Mariehamn4

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 (mm)
36 mm monthly rainfall in January in Mariehamn36
25 mm monthly rainfall in February in Mariehamn25
25 mm monthly rainfall in March in Mariehamn25
29 mm monthly rainfall in April in Mariehamn29
27 mm monthly rainfall in May in Mariehamn27
33 mm monthly rainfall in June in Mariehamn33
52 mm monthly rainfall in July in Mariehamn52
64 mm monthly rainfall in August in Mariehamn64
61 mm monthly rainfall in September in Mariehamn61
53 mm monthly rainfall in October in Mariehamn53
59 mm monthly rainfall in November in Mariehamn59
44 mm monthly rainfall in December in Mariehamn44

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 / mm)  |  Imperial (°F / inches)

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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 (°C)

Mariehamn, Finland
USA (Washington)
5
7
1
13
6
19
12
24
17
29
19
31
18
30
14
26
9
20
5
14
1
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
-1
-2

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

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