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Climate Lab — Mariehamn, Aland Islands

Climate Lab·

Monthly climate metrics across temperature, precipitation, wind, and UV.

MetricJanFebMarAprMayJunJulAugSepOctNovDecYear
Temperature
Daily high°C
4
3
4
5
10
18
18
19
16
13
9
5
10
Daily mean°C
1
1
2
3
8
14
17
18
14
10
6
1
8
Daily low°C
-1
-2
-1
0
5
11
15
16
11
7
1
-3
5
Thermal comfort
High feels°C
-7
-5
2
10
15
25
22
24
16
7
1
-7
8
Mean feels°C
-16
-16
-11
-3
7
18
18
16
9
0
-8
-14
0
Low feels°C
-24
-24
-21
-15
-4
7
9
8
0
-8
-19
-22
-9
Humidity
Humidity%
82
82
81
81
80
85
82
83
84
83
83
80
82
Dewpoint°C
-1.8
-1.2
-0.5
0.4
4.6
11.4
13.4
14.5
11.4
8.0
2.7
-2.8
5.0
Precipitation
Rainfallmm
57
17
24
23
29
25
59
74
45
85
54
38
530
Rain days≥1mm
11
8
5
7
6
4
11
14
10
16
14
11
117
Snowfallmm
15
24
12
3
0
0
0
0
0
0
3
23
80
Snow days≥1mm
4
6
3
1
0
0
0
0
0
0
2
5
21
Wind
Wind avgm/s
8.9
8.0
7.3
6.4
5.4
4.6
6.0
6.1
6.7
8.2
8.1
8.0
7.0
Wind gustsm/s
14.3
12.9
12.8
12.2
10.1
9.6
10.2
11.0
11.3
12.4
11.8
12.5
11.7
Sun & UV
Sunshinehrs/day
0.0
3.0
7.0
11.2
12.5
13.9
12.8
11.2
8.2
4.0
0.0
0.0
7.0
Clear skyindex
10%
25%
34%
56%
55%
63%
48%
50%
30%
32%
16%
6%
35%
UV indexmax avg
0.1
0.4
1.1
2.4
3.8
5.0
4.3
3.5
2.0
0.8
0.2
0.1
2.0
Based on 2014–2024 hourly climate data · Updated Mar 2025
Confidence: High

How winter feel compares

Compared worldwide

Mariehamn: -20.6 °C. Typical range: -9.1–15.9 °C. Low anchor: Toronto, -18.1 °C. High anchor: Singapore, 25.2 °C.

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