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Climate in Hanko (Finland)


Average weather, temperature, rainfall, sunshine hours

Flag - Finland

Hanko, where it's located


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Climate chart - Hanko
The climate of Hanko is Baltic, that is, moderately continental, with cold winters, during which the average temperature is a few degrees below freezing, and mild to pleasantly warm summers.
Hanko (Hangö in Swedish) is located in the south-western tip of Finland, in the area where the climate is (relatively) milder.
The white nights, when it doesn't get completely dark even at midnight, occur from May 13th to July 31st.
In winter, there can be cold spells of arctic origin. The coldest record is -35.2 °C (-31.4 °F) and was set in February 1966.
In summer, there can be short hot periods. The highest record is 31.1 °C (88 °F) and was set in July 1983.

Hanko

Best Time


The best time to visit Hanko is the summer, 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.

Hanko - Climate data


In Hanko, the average temperature of the coldest month (February) is of -3.2 °C, that of the warmest month (July) is of 17.7 °C. Here are the average temperatures.
Hanko - Average temperatures (1991-2020)
Temperatures (°C)
MonthMinMaxMean
January-4.50-2.2
February-5.6-0.8-3.2
March-3.52-0.8
April0.76.83.8
May5.813.19.4
June10.517.514
July14.321.117.7
August13.92016.9
September1015.212.6
October59.37.2
November1.24.93.1
December-22.20.1
Year3.99.36.6

Precipitation amounts to 630 millimeters per year: so, it is at an intermediate level. It ranges from 30 millimeters in the driest month (April) to 80 millimeters in the wettest one (August). Here is the average precipitation.
Hanko - Average precipitation
MonthRain (mm)Days
January5511
February409
March358
April307
May356
June508
July507
August809
September509
October7511
November7012
December6013
Year630109

The sea temperature ranges from 1.5 °C in February, March to 17.5 °C in August. Here are the average sea temperatures.
Hanko - Sea temperature
MonthTemperatures (°C)
January3
February1.5
March1.5
April2.5
May5.5
June11
July16
August17.5
September14.5
October11
November7.5">
December5
Year8.1

Hanko - Weather by month

Based on the period 1991-2020
(January - February - March - April - May - June - July - August - September - October - November - December)


January is generally a very cold month. The average temperature is of -2.2 °C, with a minimum of -4.5 °C and a maximum of 0 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -15.5 °C. However, it dropped to -26.3 °C in January 2003.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 4.5 °C. However, it reached 7.7 °C in January 2020.
Rain iconPrecipitation amounts to 55 mm, distributed over 11 days.
The day lasts on average 6 hours and 55 minutes. So the days are short.
The average humidity is 87%. Hence, the air is normally humid.
The average wind speed is of 20 kph.
Sea iconThe 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 -3.2 °C, with a minimum of -5.6 °C and a maximum of -0.8 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -15.5 °C. However, it dropped to -24.5 °C in February 2001.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 4.5 °C. However, it reached 8.5 °C in February 2015.
Rain iconPrecipitation amounts to 40 mm, distributed over 9 days.
The day lasts on average 9 hours and 10 minutes.
The average humidity is 88%. Hence, the air is normally humid.
The average wind speed is of 18 kph.
Sea iconThe 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 -0.8 °C, with a minimum of -3.5 °C and a maximum of 2 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -12 °C. However, it dropped to -22 °C in March 2013.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 7.5 °C. However, it reached 14.4 °C in March 2007.
Rain iconPrecipitation amounts to 35 mm, distributed over 8 days.
The day lasts on average 11 hours and 55 minutes.
The average humidity is 86%. Hence, the air is normally humid.
The average wind speed is of 18 kph.
Sea iconThe 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 3.8 °C, with a minimum of 0.7 °C and a maximum of 6.8 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -4 °C. However, it dropped to -9.6 °C in April 2013.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 14 °C. However, it reached 19.7 °C in April 2014.
Rain iconPrecipitation amounts to 30 mm, distributed over 7 days.
The day lasts on average 14 hours and 40 minutes.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is of 16 kph.
Sea iconThe 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 9.4 °C, with a minimum of 5.8 °C and a maximum of 13.1 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 0.5 °C. However, it dropped to -1.9 °C in May 1999.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 21 °C. However, it reached 25.5 °C in May 1992.
Rain iconPrecipitation amounts to 35 mm, distributed over 6 days.
The day lasts on average 17 hours and 10 minutes. So the days are very long.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of 16 kph.
Sea iconThe 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 14 °C, with a minimum of 10.5 °C and a maximum of 17.5 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 6 °C. However, it dropped to 3.3 °C in June 2009.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 23.5 °C. However, it reached 27.6 °C in June 2009.
Rain iconPrecipitation amounts to 50 mm, distributed over 8 days.
The day lasts on average 18 hours and 40 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 humidity is 76%. Hence, the air is normally humid.
The average wind speed is of 16 kph.
Sea iconThe 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 17.7 °C, with a minimum of 14.3 °C and a maximum of 21.1 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 10 °C. However, it dropped to 7.9 °C in July 1992.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 26 °C. However, it reached 30.9 °C in July 2019.
Rain iconPrecipitation amounts to 50 mm, distributed over 7 days.
The day lasts on average 17 hours and 50 minutes. So the days are very long.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is of 15 kph.
Sea iconThe 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 16.9 °C, with a minimum of 13.9 °C and a maximum of 20 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 9 °C. However, it dropped to 5.4 °C in August 2007.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 24.5 °C. However, it reached 28 °C in August 2018.
Rain iconPrecipitation amounts to 80 mm, distributed over 9 days.
The day lasts on average 15 hours and 30 minutes. So the days are long.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is of 15 kph.
Sea iconThe 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 12.6 °C, with a minimum of 10 °C and a maximum of 15.2 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 4 °C. However, it dropped to 0.8 °C in September 2013.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 19.5 °C. However, it reached 23.2 °C in September 2002.
Rain iconPrecipitation amounts to 50 mm, distributed over 9 days.
The day lasts on average 12 hours and 50 minutes.
The average humidity is 83%. Hence, the air is normally humid.
The average wind speed is of 18 kph.
Sea iconThe average sea temperature is of 14.6 °C. Therefore, the sea is very cold for swimming.


October is generally a quite mild month. The average temperature is of 7.2 °C, with a minimum of 5 °C and a maximum of 9.3 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -2 °C. However, it dropped to -9.2 °C in October 1992.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 14 °C. However, it reached 16.1 °C in October 2011.
Rain iconPrecipitation amounts to 75 mm, distributed over 11 days.
The day lasts on average 10 hours and 0 minutes.
The average humidity is 85%. Hence, the air is normally humid.
The average wind speed is of 19 kph.
Sea iconThe 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 1.2 °C and a maximum of 4.9 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -6 °C. However, it dropped to -13.7 °C in November 2010.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 9.5 °C. However, it reached 12.2 °C in November 2015.
Rain iconPrecipitation amounts to 70 mm, distributed over 12 days.
The day lasts on average 7 hours and 30 minutes. So the days are short.
The average humidity is 86%. Hence, the air is normally humid.
The average wind speed is of 21 kph.
Sea iconThe 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 0.1 °C, with a minimum of -2 °C and a maximum of 2.2 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -10.5 °C. However, it dropped to -22.4 °C in December 2002.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 6 °C. However, it reached 9.5 °C in December 2011.
Rain iconPrecipitation amounts to 60 mm, distributed over 13 days.
The day lasts on average 6 hours and 5 minutes. So the days are short. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
The average humidity is 88%. Hence, the air is normally humid.
The average wind speed is of 21 kph.
Sea iconThe average sea temperature is of 4.9 °C. Therefore, the sea is very cold for swimming.

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