When to go · Åland Islands

When to go to Mariehamn

Twelve months of averages for Mariehamn, and what they say about when to go.

When to go

What the averages say

Mean daily highs and lows and the month's rain, averaged over 2001 to 2020.

On these averages, Mariehamn has a mean high between 18°C and 32°C and under 150 mm of rain in July and August.

Cold months (a mean high under 10°C): October to April.
The warmest month is July (19°C) and the coolest February (0°C). The wettest is October (70 mm) and the driest April (36 mm); about 649 mm of rain falls in a year.

How these sentences are worded

Each sentence is written from the figures by fixed rules, and says no more than they do. Mild to warm: a mean daily high from 18°C up to 32°C. Hot: 32°C or more. Cool: 10°C up to 18°C. Cold: under 10°C. Dry: under 50 mm of rain in the month; wet: 150 mm or more. Humid: a high of 25°C or more with relative humidity of 70% or more. A month is described as good for going when it is mild to warm and not wet.

Mariehamn: highs, lows and rainHighLowRain

The year at a glance

Mild to warm and dry
Mild to warm, humid or showery
Hot
Cool
Wet
Cold

JanCold
FebCold
MarCold
AprCold
MayCool
JunCool
JulMild–warm, mixed
AugMild–warm, mixed
SeptCool
OctCold
NovCold
DecCold

Month by month

Every month in Mariehamn

The whole year, with humidity, cloud and the sunlight reaching the ground.

Climate in Mariehamn by month: mean daily high and low, rain, and what the month is like
Month	High	Low	Rain	Humidity	Cloud	Sunlight (kWh/m²/day)	High in Dubai	What it is like
January	1°C	-1°C	53 mm	87%	85%	0.2	23°C	Cold
February	0°C	-2°C	40 mm	89%	82%	0.8	24°C	Cold
March	1°C	-1°C	38 mm	87%	71%	2.3	27°C	Cold
April	5°C	2°C	36 mm	86%	61%	4	31°C	Cold
May	10°C	6°C	42 mm	85%	59%	5.4	35°C	Cool
June	14°C	11°C	58 mm	82%	58%	6.1	37°C	Cool
July	19°C	16°C	58 mm	82%	61%	5.6	39°C	Mild to warm, humid or showery
August	18°C	16°C	64 mm	81%	63%	4.3	39°C	Mild to warm, humid or showery
September	15°C	12°C	60 mm	83%	66%	2.6	37°C	Cool
October	9°C	7°C	70 mm	85%	77%	1.1	34°C	Cold
November	6°C	4°C	68 mm	88%	84%	0.4	29°C	Cold
December	3°C	1°C	62 mm	87%	83%	0.1	25°C	Cold

The Dubai column is Dubai's mean daily high, for comparison.

Modelled averages for an area about 50 km across, not a weather station's record: NASA POWER climatology, 2001–2020. These data were obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program.

When to go nearby

Plan it

Plan a trip to Mariehamn

Tell us when and who is travelling, and a person puts the flights, the stays and the rest into one quote.

Plan a trip to Mariehamn More about Mariehamn When to go

Month

High

Low

Rain

Humidity

Cloud

Sunlight (kWh/m²/day)

High in Dubai

What it is like

January

1°C

-1°C

53 mm

87%

85%

0.2

23°C

Cold

February

0°C

-2°C

40 mm

89%

82%

0.8

24°C

Cold

March

1°C

-1°C

38 mm

87%

71%

2.3

27°C

Cold

April

5°C

2°C

36 mm

86%

61%

31°C

Cold

May

10°C

6°C

42 mm

85%

59%

5.4

35°C

Cool

June

14°C

11°C

58 mm

82%

58%

6.1

37°C

Cool

July

19°C

16°C

58 mm

82%

61%

5.6

39°C

Mild to warm, humid or showery

August

18°C

16°C

64 mm

81%

63%

4.3

39°C

Mild to warm, humid or showery

September

15°C

12°C

60 mm

83%

66%

2.6

37°C

Cool

October

9°C

7°C

70 mm

85%

77%

1.1

34°C

Cold

November

6°C

4°C

68 mm

88%

84%

0.4

29°C

Cold

December

3°C

1°C

62 mm

87%

83%

0.1

25°C

Cold