, with cold winters, during which the average temperature is a few degrees below freezing, and mild to pleasantly warm summers.
The Åland islands lie between the southwest of Finland and the east coast of Sweden, and between the Baltic Sea to the south and the Gulf of Bothnia to the north, and their climate is mitigated by the sea. On average, the first snowfalls occur in November, though the ground is permanently snow-covered from the beginning of January to the end of March.
, when it doesn't get completely dark even at midnight, occur from 12 May to 1 August.
, there can be cold spells of arctic origin. At Mariehamn airport, the coldest record is -32.9 °C (-27.2 °F) and was set in January 1979.
, there can be short hot periods. The highest record is 31 °C (87.8 °F) and was set in July 2019.
, from June to August, since it is the mildest season. However, you must take into account some rainy days and a bit of cold at night.
. Here are the average temperatures.
January is generally a very cold month. The average temperature is of
-1.6 °C, with a minimum of
-4.2 °C and a maximum of
1 °C.
On the coldest nights of the month, the temperature usually drops to around
-16 °C. However, it dropped to
-28.5 °C in January 2003.
On the warmest days of the month, the temperature usually reaches around
6 °C. However, it reached
9.8 °C in January 1992.
Precipitation amounts to
50 mm, distributed over 10 days.
The day lasts on average 6 hours and 50 minutes. So the days are short.
There are on average 1.5 hours of sunshine per day. So, the sun shines 18% of the time.
The average humidity is 87%. Hence, the air is normally humid.
The average wind speed is of
14.9 kph.
The average sea temperature is of
2.9 °C. Therefore, the sea is very cold for swimming.
February, the coldest month of the year, is generally a very cold month. The average temperature is of
-2.6 °C, with a minimum of
-5.5 °C and a maximum of
0.4 °C.
On the coldest nights of the month, the temperature usually drops to around
-16.5 °C. However, it dropped to
-28.1 °C in February 2011.
On the warmest days of the month, the temperature usually reaches around
6 °C. However, it reached
10.1 °C in February 1991.
Precipitation amounts to
35 mm, distributed over 8 days.
The day lasts on average 9 hours and 10 minutes.
There are on average 2.5 hours of sunshine per day. So, the sun shines 29% of the time.
The average humidity is 86%. Hence, the air is normally humid.
The average wind speed is of
13.4 kph.
The average sea temperature is of
1.6 °C. Therefore, the sea is very cold for swimming.
March is generally a very cold month. The average temperature is of
-0.4 °C, with a minimum of
-3.7 °C and a maximum of
2.9 °C.
On the coldest nights of the month, the temperature usually drops to around
-13.5 °C. However, it dropped to
-21.4 °C in March 2005.
On the warmest days of the month, the temperature usually reaches around
9.5 °C. However, it reached
17 °C in March 2017.
Precipitation amounts to
35 mm, distributed over 8 days.
The day lasts on average 11 hours and 55 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 35% of the time.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is of
13.7 kph.
The average sea temperature is of
1.4 °C. Therefore, the sea is very cold for swimming.
April is generally a cold month. The average temperature is of
3.7 °C, with a minimum of
-0.3 °C and a maximum of
7.8 °C.
On the coldest nights of the month, the temperature usually drops to around
-6 °C. However, it dropped to
-9.3 °C in April 2013.
On the warmest days of the month, the temperature usually reaches around
15 °C. However, it reached
20 °C in April 2019.
Precipitation amounts to
30 mm, distributed over 7 days.
The day lasts on average 14 hours and 40 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 47% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
13.3 kph.
The average sea temperature is of
2.6 °C. Therefore, the sea is very cold for swimming.
May is generally a mild month. The average temperature is of
8.6 °C, with a minimum of
4.1 °C and a maximum of
13.1 °C.
On the coldest nights of the month, the temperature usually drops to around
-3 °C. However, it dropped to
-5.9 °C in May 1999.
On the warmest days of the month, the temperature usually reaches around
21.5 °C. However, it reached
27.1 °C in May 2018.
Precipitation amounts to
35 mm, distributed over 6 days.
The day lasts on average 17 hours and 20 minutes. So the days are very long.
There are on average 9.5 hours of sunshine per day. So, the sun shines 55% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of
12.9 kph.
The average sea temperature is of
5.7 °C. Therefore, the sea is very cold for swimming.
June is generally a mild month. The average temperature is of
12.9 °C, with a minimum of
8.5 °C and a maximum of
17.3 °C.
On the coldest nights of the month, the temperature usually drops to around
2 °C. However, it dropped to
-1.3 °C in June 2001.
On the warmest days of the month, the temperature usually reaches around
23.5 °C. However, it reached
28.3 °C in June 2020.
Precipitation amounts to
55 mm, distributed over 8 days.
The day lasts on average 18 hours and 50 minutes. So the days are very long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 10 hours of sunshine per day. So, the sun shines 52% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
12.9 kph.
The average sea temperature is of
11 °C. Therefore, the sea is very cold for swimming.
July, the warmest month of the year, is generally a very mild month. The average temperature is of
16.4 °C, with a minimum of
12.2 °C and a maximum of
20.6 °C.
On the coldest nights of the month, the temperature usually drops to around
5.5 °C. However, it dropped to
2.1 °C in July 1992.
On the warmest days of the month, the temperature usually reaches around
26 °C. However, it reached
31 °C in July 2018.
Precipitation amounts to
55 mm, distributed over 7 days.
The day lasts on average 17 hours and 55 minutes. So the days are very long.
There are on average 10 hours of sunshine per day. So, the sun shines 56% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
12.1 kph.
The average sea temperature is of
16.2 °C. Therefore, the sea is cold for swimming.
August is generally a very mild month. The average temperature is of
15.4 °C, with a minimum of
11.1 °C and a maximum of
19.7 °C.
On the coldest nights of the month, the temperature usually drops to around
4 °C. However, it dropped to
0.7 °C in August 2007.
On the warmest days of the month, the temperature usually reaches around
25.5 °C. However, it reached
29 °C in August 2014.
Precipitation amounts to
70 mm, distributed over 9 days.
The day lasts on average 15 hours and 30 minutes. So the days are long.
There are on average 7.5 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of
12 kph.
The average sea temperature is of
17.4 °C. Therefore, the sea is cold for swimming.
September is generally a mild month. The average temperature is of
11.4 °C, with a minimum of
7.5 °C and a maximum of
15.3 °C.
On the coldest nights of the month, the temperature usually drops to around
0 °C. However, it dropped to
-3.5 °C in September 1996.
On the warmest days of the month, the temperature usually reaches around
20 °C. However, it reached
24.8 °C in September 1992.
Precipitation amounts to
60 mm, distributed over 9 days.
The day lasts on average 12 hours and 50 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 42% of the time.
The average humidity is 83%. Hence, the air is normally humid.
The average wind speed is of
12.3 kph.
The average sea temperature is of
14.6 °C. Therefore, the sea is very cold for swimming.
October is generally a quite cold month. The average temperature is of
6.4 °C, with a minimum of
3.3 °C and a maximum of
9.6 °C.
On the coldest nights of the month, the temperature usually drops to around
-5 °C. However, it dropped to
-10.8 °C in October 2002.
On the warmest days of the month, the temperature usually reaches around
14.5 °C. However, it reached
18 °C in October 2015.
Precipitation amounts to
75 mm, distributed over 12 days.
The day lasts on average 10 hours and 0 minutes.
There are on average 3 hours of sunshine per day. So, the sun shines 29% of the time.
The average humidity is 85%. Hence, the air is normally humid.
The average wind speed is of
13 kph.
The average sea temperature is of
10.8 °C. Therefore, the sea is very cold for swimming.
November is generally a cold month. The average temperature is of
3.1 °C, with a minimum of
0.8 °C and a maximum of
5.4 °C.
On the coldest nights of the month, the temperature usually drops to around
-7.5 °C. However, it dropped to
-20 °C in November 2010.
On the warmest days of the month, the temperature usually reaches around
10 °C. However, it reached
16.6 °C in November 2020.
Precipitation amounts to
65 mm, distributed over 13 days.
The day lasts on average 7 hours and 25 minutes. So the days are short.
There are on average 1.5 hours of sunshine per day. So, the sun shines 18% of the time.
The average humidity is 88%. Hence, the air is normally humid.
The average wind speed is of
14.1 kph.
The average sea temperature is of
7.5 °C. Therefore, the sea is very cold for swimming.
December is generally a cold month. The average temperature is of
0.6 °C, with a minimum of
-1.8 °C and a maximum of
2.9 °C.
On the coldest nights of the month, the temperature usually drops to around
-12 °C. However, it dropped to
-24.6 °C in December 1996.
On the warmest days of the month, the temperature usually reaches around
7 °C. However, it reached
11.1 °C in December 2015.
Precipitation amounts to
60 mm, distributed over 13 days.
The day lasts on average 6 hours and 0 minutes. So the days are short. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There is an average of 1 hour of sunshine per day. So, the sun shines 14% of the time.
The average humidity is 88%. Hence, the air is normally humid.
The average wind speed is of
14.9 kph.
The average sea temperature is of
4.9 °C. Therefore, the sea is very cold for swimming.