The city is located in central-northern Finland, in the northernmost part of the Gulf of Bothnia (known as Perämeri), which can freeze in winter. It is useful to recall that sea water freezes at about -2 °C (28.5 °F).
.
It is true that we are at the 65th parallel, therefore just south of the Arctic Circle, but due to atmospheric refraction, the
can be seen here as well, from 19 to 25 June. The
, when the sun sets but it doesn't get completely dark even at midnight, occur before and after the period of the midnight sun, ie from April 23rd, and until August 20th.
, there can be cold spells of arctic origin. The coldest record is -41.7 °C (-43.1 °F) and was set in February 1966.
, there can be short hot periods. The highest record is 32.7 °C (90.9 °F) and was set in July 1970.
, 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 freezing cold month. The average temperature is of
-9.4 °C, with a minimum of
-13.3 °C and a maximum of
-5.5 °C.
On the coldest nights of the month, the temperature usually drops to around
-28 °C. However, it dropped to
-40.2 °C in January 1999.
On the warmest days of the month, the temperature usually reaches around
2.5 °C. However, it reached
6.5 °C in January 2002.
Precipitation amounts to
55 mm, distributed over 11 days.
The day lasts on average 4 hours and 50 minutes. So the days are short.
The average sea temperature is of
0.6 °C. Therefore, the sea is very cold for swimming.
February, the coldest month of the year, is generally a freezing cold month. The average temperature is of
-9.6 °C, with a minimum of
-13.6 °C and a maximum of
-5.6 °C.
On the coldest nights of the month, the temperature usually drops to around
-27 °C. However, it dropped to
-34.3 °C in February 2012.
On the warmest days of the month, the temperature usually reaches around
3.5 °C. However, it reached
7.6 °C in February 1993.
Precipitation amounts to
45 mm, distributed over 9 days.
The day lasts on average 8 hours and 20 minutes.
The average sea temperature is of
-0.4 °C. Therefore, the sea is very cold for swimming.
March is generally a freezing cold month. The average temperature is of
-5.1 °C, with a minimum of
-9.5 °C and a maximum of
-0.7 °C.
On the coldest nights of the month, the temperature usually drops to around
-22 °C. However, it dropped to
-30 °C in March 2006.
On the warmest days of the month, the temperature usually reaches around
7 °C. However, it reached
10.5 °C in March 2016.
Precipitation amounts to
40 mm, distributed over 8 days.
The day lasts on average 11 hours and 50 minutes.
The average sea temperature is of
-0.6 °C. Therefore, the sea is very cold for swimming.
April is generally a cold month. The average temperature is of
0.7 °C, with a minimum of
-3.5 °C and a maximum of
4.9 °C.
On the coldest nights of the month, the temperature usually drops to around
-12.5 °C. However, it dropped to
-17.5 °C in April 1998.
On the warmest days of the month, the temperature usually reaches around
12 °C. However, it reached
17.2 °C in April 2002.
Precipitation amounts to
35 mm, distributed over 7 days.
The day lasts on average 15 hours and 30 minutes.
The average sea temperature is of
0.1 °C. Therefore, the sea is very cold for swimming.
May is generally a quite mild month. The average temperature is of
7 °C, with a minimum of
2.3 °C and a maximum of
11.7 °C.
On the coldest nights of the month, the temperature usually drops to around
-3.5 °C. However, it dropped to
-7.9 °C in May 1999.
On the warmest days of the month, the temperature usually reaches around
21 °C. However, it reached
28.8 °C in May 2013.
Precipitation amounts to
45 mm, distributed over 8 days.
The day lasts on average 19 hours and 25 minutes. So the days are very long.
The average sea temperature is of
2.7 °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
8.4 °C and a maximum of
17.4 °C.
On the coldest nights of the month, the temperature usually drops to around
2.5 °C. However, it dropped to
0.4 °C in June 2004.
On the warmest days of the month, the temperature usually reaches around
25 °C. However, it reached
31.9 °C in June 2011.
Precipitation amounts to
55 mm, distributed over 8 days.
The day lasts on average 23 hours and 25 minutes. So the days are very long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
The average sea temperature is of
7.5 °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
16.3 °C, with a minimum of
12 °C and a maximum of
20.7 °C.
On the coldest nights of the month, the temperature usually drops to around
6 °C. However, it dropped to
3.3 °C in July 1999.
On the warmest days of the month, the temperature usually reaches around
26.5 °C. However, it reached
31 °C in July 2019.
Precipitation amounts to
60 mm, distributed over 9 days.
The day lasts on average 20 hours and 50 minutes. So the days are very long.
The average sea temperature is of
13.1 °C. Therefore, the sea is very cold for swimming.
August is generally a mild month. The average temperature is of
14.2 °C, with a minimum of
10.1 °C and a maximum of
18.3 °C.
On the coldest nights of the month, the temperature usually drops to around
3 °C. However, it dropped to
-0.3 °C in August 2010.
On the warmest days of the month, the temperature usually reaches around
24 °C. However, it reached
28 °C in August 2002.
Precipitation amounts to
65 mm, distributed over 8 days.
The day lasts on average 16 hours and 40 minutes. So the days are long.
The average sea temperature is of
14.6 °C. Therefore, the sea is very cold for swimming.
September is generally a mild month. The average temperature is of
9 °C, with a minimum of
5.4 °C and a maximum of
12.7 °C.
On the coldest nights of the month, the temperature usually drops to around
-2 °C. However, it dropped to
-5.3 °C in September 2018.
On the warmest days of the month, the temperature usually reaches around
18.5 °C. However, it reached
23.6 °C in September 1995.
Precipitation amounts to
65 mm, distributed over 9 days.
The day lasts on average 13 hours and 5 minutes.
The average sea temperature is of
12 °C. Therefore, the sea is very cold for swimming.
October is generally a cold month. The average temperature is of
2.4 °C, with a minimum of
-0.4 °C and a maximum of
5.3 °C.
On the coldest nights of the month, the temperature usually drops to around
-10.5 °C. However, it dropped to
-20 °C in October 1992.
On the warmest days of the month, the temperature usually reaches around
11.5 °C. However, it reached
16.3 °C in October 2005.
Precipitation amounts to
60 mm, distributed over 10 days.
The day lasts on average 9 hours and 30 minutes.
The average sea temperature is of
8.2 °C. Therefore, the sea is very cold for swimming.
November is generally a very cold month. The average temperature is of
-2.8 °C, with a minimum of
-5.5 °C and a maximum of
0 °C.
On the coldest nights of the month, the temperature usually drops to around
-16.5 °C. However, it dropped to
-26.6 °C in November 2002.
On the warmest days of the month, the temperature usually reaches around
6 °C. However, it reached
10 °C in November 2003.
Precipitation amounts to
70 mm, distributed over 12 days.
The day lasts on average 5 hours and 50 minutes. So the days are short.
The average sea temperature is of
4.9 °C. Therefore, the sea is very cold for swimming.
December is generally a freezing cold month. The average temperature is of
-6.6 °C, with a minimum of
-10 °C and a maximum of
-3.2 °C.
On the coldest nights of the month, the temperature usually drops to around
-23 °C. However, it dropped to
-32.1 °C in December 1995.
On the warmest days of the month, the temperature usually reaches around
3.5 °C. However, it reached
6.6 °C in December 2013.
Precipitation amounts to
60 mm, distributed over 12 days.
The day lasts on average 3 hours and 10 minutes. So the days are very short. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
The average sea temperature is of
2.4 °C. Therefore, the sea is very cold for swimming.