Turku climate

Name: Turku
Address: FI

Turku is warmest in July, with average highs of 22 °C, and coldest in February, when nights average -7.3 °C. July is the wettest month (86 mm) and April the driest (33 mm). Figures are 1991–2020 climate normals.

Across a full year Turku averages 669 mm of rain, 10 days above 25 °C and 137 days below freezing.

Finland · population 206,655 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month July 22 °C
Coldest month February -7.3 °C
Driest month April 33 mm
Wettest month July 86 mm
Least cloud May 54 % cloud
Hottest on record July 33 °C
Coldest on record February -28 °C

What to expectTurku through the year

Turku has a clear annual cycle: average daily highs run from -1.9 °C in February to 22 °C in July, a swing of 22 °C in mean temperature across the year.

Counted across a normal year, 10 days a year reach 25 °C, 0 of them reach 30 °C, 137 nights drop below freezing. The warmest reading in the 1991–2020 record is 33 °C, in July.

Rain is strongly seasonal. July averages 86 mm against 33 mm in April — 2.6 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	-1.4 °C	49 mm	79 %
February	-1.9 °C	39 mm	76 %
March	1.8 °C	36 mm	65 %
April	8.3 °C	33 mm	63 %
May	14.5 °C	42 mm	54 %
June	18.6 °C	68 mm	58 %
July	21.5 °C	86 mm	56 %
August	20.2 °C	81 mm	61 %
September	15.1 °C	59 mm	65 %
October	8.4 °C	61 mm	72 %
November	3.6 °C	57 mm	80 %
December	0.6 °C	58 mm	80 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days below 0 °C
January	-1.4 °C	-6.0 °C	-3.5 °C	9.0 °C	-27.7 °C	0	26
February	-1.9 °C	-7.3 °C	-4.4 °C	7.5 °C	-28.2 °C	0	25
March	1.8 °C	-4.9 °C	-1.4 °C	13.1 °C	-21.2 °C	0	26
April	8.3 °C	-0.1 °C	4.2 °C	21.9 °C	-11.7 °C	0	15
May	14.5 °C	5.1 °C	10.2 °C	28.0 °C	-3.9 °C	1	2
June	18.6 °C	9.9 °C	14.7 °C	29.8 °C	2.0 °C	2	0
July	21.5 °C	13.4 °C	17.8 °C	33.4 °C	6.5 °C	5	0
August	20.2 °C	12.7 °C	16.6 °C	30.0 °C	5.6 °C	3	0
September	15.1 °C	8.7 °C	11.9 °C	24.3 °C	-1.1 °C	0	0
October	8.4 °C	3.7 °C	6.1 °C	17.1 °C	-13.8 °C	0	7
November	3.6 °C	0.0 °C	1.9 °C	13.0 °C	-18.6 °C	0	14
December	0.6 °C	-3.4 °C	-1.3 °C	9.8 °C	-24.3 °C	0	21

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	49 mm	10	6.6 h/day	79 %	88 %	19 km/h
February	39 mm	9	9.1 h/day	76 %	86 %	18 km/h
March	36 mm	8	12 h/day	65 %	82 %	18 km/h
April	33 mm	8	15 h/day	63 %	74 %	17 km/h
May	42 mm	9	17 h/day	54 %	67 %	17 km/h
June	68 mm	11	19 h/day	58 %	70 %	17 km/h
July	86 mm	12	18 h/day	56 %	72 %	16 km/h
August	81 mm	12	16 h/day	61 %	77 %	16 km/h
September	59 mm	10	13 h/day	65 %	81 %	17 km/h
October	61 mm	10	10 h/day	72 %	86 %	18 km/h
November	57 mm	11	7.5 h/day	80 %	89 %	18 km/h
December	58 mm	11	5.8 h/day	80 %	89 %	19 km/h

How Turku compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Turku	22 °C	-7.3 °C	669 mm	10
Mariehamn · Aland Islands	19 °C	-3.1 °C	509 mm	1
Tampere · Finland	21 °C	-8.4 °C	630 mm	9
Helsinki · Finland	21 °C	-7.3 °C	673 mm	5
Vantaa · Finland	22 °C	-8.0 °C	672 mm	12
Tallinn · Estonia	21 °C	-6.5 °C	633 mm	11
Stockholm · Sweden	21 °C	-4.0 °C	567 mm	7

Where Turku ranks

Ranking	Position	Value
The driest places in Europe in April	38thof 50	33 mm
The coolest places in Europe in May	39thof 50	15 °C
The coolest places in Europe in April	41stof 50	8.3 °C
The coolest places in Europe in September	49thof 50	15 °C

Planning a trip? See the best time to visit Turku.

QuestionsCommon questions about Turku’s climate

When is the best time to visit Turku?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, August sit closest to 20 °C on average, July is the warmest month and April the driest. The month-by-month table above has the full picture.

How hot does Turku get?

In July, the warmest month, daily highs average 22 °C. About 0 days a year pass 30 °C. The highest value in the 1991–2020 record is 33 °C.

How cold does it get in winter?

Nights average -7.3 °C in February, the coldest month. A normal year has 137 nights below freezing.

Which month is wettest in Turku?

July, averaging 86 mm over 12 days with rain. The driest month is April with 33 mm. The year as a whole averages 669 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Turku rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.