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Weather in Mariehamn for May 2026

Your guide to Mariehamn weather in May - trends and predictions

    Official Weather Alert ⚠️

  • Wind Warning for Marine Areas - See hour by hour.

    • Temperatures

  • Until now, May 2026 in Mariehamn has been nearly identical to the historical average, with a temperature of 8.1 °C (showing only a slight deviation of 0.2 °C).

  • The forecast for the next days in Mariehamn predicts temperatures to be around 11 °C, close to the historical average.

  • In general, the average temperature in Mariehamn at the beginning of May is 6.3 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 10.9 °C by the end of May.

    • Rain 🌧️

  • Mariehamn experiences moderate rainfall in May, with an average of 8 rainy days and a total precipitation of 17.5 mm.

Average dry days
23
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
8°/6°
Temperatures
Average wind speed
28 km/h
Avg max wind
Average humidity
79 %
Avg humidity

Mariehamn Weather May

Move between months or click on a day
April
June
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
6°
2
Patchy rain possible
8°
3
Overcast
7°
4
Patchy rain possible
7°
5
Patchy rain possible
6°
6
Overcast
5°
7
Partly cloudy
5°
8
Partly cloudy
6°
9
Partly cloudy
6°
10
Overcast
7°
11
Sunny
7°
12
Sunny
8°
13
Sunny
8°
14
Sunny
8°
15
Overcast
9°
16
Heavy rain at times
9°
17
Sunny
9°
18
Sunny
10°
19
Sunny
10°
20
Sunny
10°
21
Sunny
9°
22
Overcast
11°
23
Moderate rain at times
11°
24
Overcast
11°
25
Weather Alert Patchy rain possible
11°
26
Weather Alert Patchy rain possible
10°
27
Weather Alert Patchy rain possible
10°
28
Weather Alert Sunny
10°
29
Sunny
11°
30
Partly cloudy
12°
31
Sunny
12°

Temperatures trend during May in Mariehamn

See the weather trend as well as the moving average line

May weather in Mariehamn day by day

Click on a date for more information
April June
Date Weather Temperatures Rain UV More
1 May Sunny
Sunny
 6° /3° 1.1 mm 3
2 May Patchy rain possible
Patchy rain possible
 8° /4° 1.8 mm 3
3 May Overcast
Overcast
 7° /4° 0.4 mm 2
4 May Patchy rain possible
Patchy rain possible
 7° /2° 0.9 mm 2
5 May Patchy rain possible
Patchy rain possible
 6° /2° 0.2 mm 3
6 May Overcast
Overcast
 5° /2° 0 mm 2
7 May Partly cloudy
Partly cloudy
 5° /3° 0 mm 2
8 May Partly cloudy
Partly cloudy
 6° /3° 0 mm 3
9 May Partly cloudy
Partly cloudy
 6° /4° 0.4 mm 3
10 May Overcast
Overcast
 7° /4° 0.4 mm 2
11 May Sunny
Sunny
 7° /5° 0.1 mm 3
12 May Sunny
Sunny
 8° /5° 1.3 mm 3
13 May Sunny
Sunny
 8° /5° 1.6 mm 2
14 May Sunny
Sunny
 8° /5° 1 mm 3
15 May Overcast
Overcast
 9° /6° 0.5 mm 3
16 May Heavy rain at times
Heavy rain at times
 9° /6° 1 mm 2
17 May Sunny
Sunny
 9° /6° 1.8 mm 3
18 May Sunny
Sunny
 10° /6° 0 mm 4
19 May Sunny
Sunny
 10° /7° 3.3 mm 3
20 May Sunny
Sunny
 10° /7° 0 mm 4
21 May Sunny
Sunny
 9° /7° 1.1 mm 3
22 May Overcast
Overcast
 11° /7° 0.1 mm 3
23 May Moderate rain at times
Moderate rain at times
 11° /8° 0.3 mm 4
24 May Overcast
Overcast
 11° /8° 0.1 mm 4
25 May Patchy rain possible
Patchy rain possible
 11° /9° 3.1 mm 4.7
26 May Patchy rain possible
Patchy rain possible
 10° /8° 2.5 mm 4.7
27 May Patchy rain possible
Patchy rain possible
 10° /8° 0.4 mm 4.2
28 May Sunny
Sunny
 10° /8° 0 mm 4.6
29 May Sunny
Sunny
 11° /9° 0 mm 4.7
30 May Partly cloudy
Partly cloudy
 12° /10° 0 mm 4
31 May Sunny
Sunny
 12° /11° 0 mm 4
Next
Important Notice
Our weather forecast for Mariehamn in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Mariehamn forecast closer to your planned date for the most up-to-date weather information.
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Mariehamn in May - FAQ

What are the expected maximum and minimum temperatures in Mariehamn during May?

During May, expect a variety of temperatures with highs around 8° and lows near 6°, suitable for diverse activities and preferences.

How much rainfall should be expected in Mariehamn during May?

Expect minimal rainfall in Mariehamn during May, with a total of 17.5 mm over approximately 8 days. This minimal precipitation is unlikely to significantly impact plans.

Will it snow in Mariehamn in May 2026?

Mariehamn typically sees 0.0266667 cm of snowfall during May.

What are the typical wind conditions in Mariehamn during May?

The average wind speed in Mariehamn during May is 28 km/h, suggesting breezy to windy conditions, depending on your activities.

May rainfall patterns in Mariehamn

Explore the daily rainfall trends and prepare for Mariehamns May weather 💧
Typically, Mariehamn has 8 rainy days in May with a total of 17.5 mm of rainfall.

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Location coordinates Where is Mariehamn?

Get accurate weather forecasts for Mariehamn, located at latitude 60.097 and longitude 19.935. Stay updated with localized weather information tailored for Mariehamn.

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