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Turku, Southwest Finland Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Turku, Southwest Finland?
Turku, Southwest Finland gets 664 mm of precipitation a year over about 163 rainy days. July is the warmest month (average high 23°C) and February the coldest (average low -7°C).
Humid continental climate
Turku, Southwest Finland has warm summers and cold winters. Daytime highs range from about -1°C in January to 23°C in July. December is usually the wettest month. The most comfortable time to visit is typically June to August, when daytime highs sit near 22°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | -5° | 0° |
| Spring | Mar–May | 1° | 9° |
| Summer | Jun–Aug | 12° | 22° |
| Autumn | Sep–Nov | 4° | 11° |
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.
From October 2025 to September 2026 Turku got 526 mm of rain, against a normal of 664 mm for those months. July 2026 had the most, with 137 mm.
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. Estimated sunshine is 20% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 27% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 45% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 48% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 57% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 42% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 33% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 25% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 19% of daylight hours, derived from ERA5 cloud cover. 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. Estimated sunshine is 16% of daylight hours, derived from ERA5 cloud cover. 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 estimated sunshine of 57% of daylight hours from ERA5 cloud cover. December is the cloudiest, at 16%. The annual cloud-cover estimate is 34% of daylight hours; it is not a measurement of sunshine duration. 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
These records cover TURKU ARTUKAINEN during 2003–2026. Earlier records or other stations in the city may differ.
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 in the available station history brought 69 mm of precipitation, 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.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | -6° | -1° | 52 mm | 16 | 90% | 20% | 9° | -26° |
| February | -7° | -1° | 39 mm | 14 | 87% | 27% | 9° | -26° |
| March | -4° | 3° | 33 mm | 13 | 80% | 38% | 15° | -21° |
| April | 0° | 9° | 32 mm | 11 | 68% | 45% | 24° | -10° |
| May | 6° | 16° | 36 mm | 11 | 61% | 48% | 29° | -4° |
| June | 10° | 20° | 50 mm | 11 | 63% | 57% | 32° | -1° |
| July | 14° | 23° | 68 mm | 12 | 73% | 42% | 33° | 4° |
| August | 13° | 22° | 75 mm | 14 | 78% | 37% | 33° | 3° |
| September | 9° | 17° | 57 mm | 12 | 82% | 33% | 28° | -1° |
| October | 3° | 9° | 73 mm | 15 | 86% | 25% | 18° | -13° |
| November | 1° | 5° | 74 mm | 18 | 90% | 19% | 14° | -18° |
| December | -3° | 2° | 76 mm | 18 | 90% | 16% | 11° | -23° |
Station: TURKU ARTUKAINEN, 5 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 2003–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
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?
Within the available 2003–2026 station history, 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 estimated sunshine of 57% of daylight hours from ERA5 cloud cover. 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.