Turku, Southwest Finland Weather by Month and Climate Averages

How much rain does Turku get?

Turku gets 664 mm of precipitation in an average year, spread over about 163 days with measurable rain. That is fewer rainy days than 59% of Finland.

December is the wettest month, with 76 mm. April is the driest, with 32 mm. December has the most rainy days, about 18.

The longest dry spell in the last five years lasted 29 days, to February 15, 2026.

Turku weather by month

Turku weather in January

In January, Turku averages a high of -1°C and a low of -6°C. It gets 52 mm of precipitation over about 16 rainy days. The sun is out about 20% of daylight hours. The January record high is 9°C (2020) and the record low is -26°C (2013).

Turku weather in February

In February, Turku averages a high of -1°C and a low of -7°C. It gets 39 mm of precipitation over about 14 rainy days. The sun is out about 27% of daylight hours. The February record high is 9°C (2021) and the record low is -26°C (2011).

Turku weather in March

In March, Turku averages a high of 3°C and a low of -4°C. It gets 33 mm of precipitation over about 13 rainy days. The sun is out about 38% of daylight hours. The March record high is 15°C (2007) and the record low is -21°C (2013).

Turku weather in April

In April, Turku averages a high of 9°C and a low of 0°C. It gets 32 mm of precipitation over about 11 rainy days. The sun is out about 45% of daylight hours. The April record high is 24°C (2008) and the record low is -10°C (2003).

Turku weather in May

In May, Turku averages a high of 16°C and a low of 6°C. It gets 36 mm of precipitation over about 11 rainy days. The sun is out about 48% of daylight hours. The May record high is 29°C (2018) and the record low is -4°C (2007).

Turku weather in June

In June, Turku averages a high of 20°C and a low of 10°C. It gets 50 mm of precipitation over about 11 rainy days. The sun is out about 57% of daylight hours. The June record high is 32°C (2011) and the record low is -1°C (2009). June is one of the most comfortable months to visit.

Turku weather in July

In July, Turku averages a high of 23°C and a low of 14°C. It gets 68 mm of precipitation over about 12 rainy days. The sun is out about 42% of daylight hours. The July record high is 33°C (2018) and the record low is 4°C (2009). July is one of the most comfortable months to visit.

Turku weather in August

In August, Turku averages a high of 22°C and a low of 13°C. It gets 75 mm of precipitation over about 14 rainy days. The sun is out about 37% of daylight hours. The August record high is 33°C (2023) and the record low is 3°C (2007). August is one of the most comfortable months to visit.

Turku weather in September

In September, Turku averages a high of 17°C and a low of 9°C. It gets 57 mm of precipitation over about 12 rainy days. The sun is out about 33% of daylight hours. The September record high is 28°C (2024) and the record low is -1°C (2019).

Turku weather in October

In October, Turku averages a high of 9°C and a low of 3°C. It gets 73 mm of precipitation over about 15 rainy days. The sun is out about 25% of daylight hours. The October record high is 18°C (2006) and the record low is -13°C (2012).

Turku weather in November

In November, Turku averages a high of 5°C and a low of 1°C. It gets 74 mm of precipitation over about 18 rainy days. The sun is out about 19% of daylight hours. The November record high is 14°C (2020) and the record low is -18°C (2010).

Turku weather in December

In December, Turku averages a high of 2°C and a low of -3°C. It gets 76 mm of precipitation over about 18 rainy days. The sun is out about 16% of daylight hours. The December record high is 11°C (2015) and the record low is -23°C (2010).

Sunshine, humidity and wind in Turku

June is the sunniest month in Turku, with sunshine about 57% of daylight hours. December is the cloudiest, at 16%. Over the year the sun shines about 34% of daylight hours. Turku is sunnier than 93% of Finland.

Humidity peaks in January at 90% and is lowest in May at 61%.

First and last freeze in Turku

The first fall freeze in Turku typically comes around October 6, and the last spring freeze around May 8. That leaves a frost-free growing season of about 151 days.

Turku weather records

The hottest temperature on record at the Turku station is 33°C, on July 27, 2018. The coldest is -26°C, on February 19, 2011.

The wettest day on record brought 69 mm of rain, on August 26, 2012.

The best time to visit Turku

The most comfortable time to visit is typically June to August, when daytime highs sit near 22°C.

Winter (December–February) is cold, with average highs around 0°C and lows near -5°C.

Spring (March–May) is chilly, with average highs around 10°C and lows near 1°C.

Summer (June–August) is warm, with average highs around 22°C and lows near 12°C. It can feel humid.

Autumn (September–November) is chilly, with average highs around 10°C and lows near 4°C.

Turku climate questions

How much rain does Turku get?

Turku gets 664 mm of precipitation in an average year, over about 163 rainy days.

What is the wettest month in Turku?

December is the wettest month in Turku, with 76 mm. April is the driest, with 32 mm.

How many rainy days does Turku have a year?

Turku has about 163 days with measurable rain in an average year. December has the most, about 18.

What is the hottest month in Turku?

July is the warmest month in Turku, with an average high of 23°C.

What is the coldest month in Turku?

February is the coldest month in Turku, with an average low of -7°C.

What is the record high temperature in Turku?

The record high at the Turku station is 33°C, set on July 27, 2018. The record low is -26°C, on February 19, 2011.

What is the sunniest month in Turku?

June is the sunniest month in Turku, with sunshine about 57% of daylight hours. December is the cloudiest.

When is the first frost in Turku?

The first fall freeze in Turku typically comes around October 6. The last spring freeze is around May 8.

What is the best time to visit Turku?

The most comfortable time to visit is typically June to August, when daytime highs sit near 22°C.