Helsinki monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Helsinki

Helsinki average temperature chart (Celsius)

Helsinki average temperature chart (Fahrenheit)

Average monthly temperatures in Helsinki (degrees centigrade and fahrenheit)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
°C	-2.4	-2.7	0.4	5.6	12.3	17.4	19.5	18.4	13.7	8.7	3.7	-0
°F	27.7	27.1	32.6	42	54.1	63.3	67.1	65.1	56.6	47.7	38.7	32

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Helsinki monthly rainfall chart (inches)

Average monthly rainfall in Helsinki (mm and inches)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
mm	37	25	27	33	30	38	61	75	64	59	62	48
inches	1.5	1	1.1	1.3	1.2	1.5	2.4	2.9	2.5	2.3	2.4	1.9
Rainy days	18	15	14	12	9	10	13	14	16	17	19	19

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Helsinki

Average daily sunshine Helsinki
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Hrs sunshine	0.7	1.8	3.6	5.6	8.8	10.7	9.3	7	4.4	2.7	1.2	0.7

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Helsinki average minimum / maximum temperatures (Celsius)

Helsinki average minimum / maximum temperatures (Fahrenheit)

Maximum and minimum daily temperatures in Helsinki (degrees centigrade and fahrenheit)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Min °C	-7.6	-8.4	-5.7	-0.5	4.4	9.6	12.4	11.9	8.2	4.4	-0.2	-4.7
Max °C	-2.3	-2.6	0.5	5.7	12.5	17.6	19.7	18.6	13.8	8.9	3.8	0.1
Min °F	18.4	16.9	21.7	31.1	39.8	49.3	54.2	53.3	46.8	39.8	31.6	23.5
Max °F	23.2	22.1	27.3	36.7	47.1	56.5	60.8	59.4	51.8	43.9	35.2	27.9

Sea temperature

The graph below shows the average sea temperature.

Helsinki average sea temperature chart (Fahrenheit)

Average sea temperature around Helsinki in degrees centigrade and fahrenheit
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
°C	2.9	1.6	1.5	2.5	5.3	10.2	15.6	16.9	13.9	10	6.8	4.5
°F	37.2	35	34.6	36.5	41.6	50.4	60.1	62.4	57	50	44.3	40.1

Wind speed

The graph below shows the average wind speed.

Helsinki average winspeed by month (km/h)

Helsinki average winspeed by month (mph)

Average wind speed in Helsinki (mph and kmh)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
km/h	19	18	18	17	16	16	15	15	18	20	21	21
mph	12	11	11	10	10	10	9	9	11	13	13	13

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Average relative humidity in Helsinki
Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
87%	87%	85%	82%	76%	75%	79%	81%	84%	85%	87%	87%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Helsinki weather stats

Helsinki weather statistics
Hottest month:	July	19.5°C 67.1°F
Driest month:	February	25mm 1ins
Sunniest month:	June	10.7hrs
Coldest month:	February	-2.7°C 27.1°F
Wettest month:	August	75mm 3ins
Warmest sea:	August	16.9°C 62.4°F