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 (mm) 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

Helsinki average daily sunshine chart
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 (Celsius) 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.

Helsinki relative humidity averages
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%
Helsinki

Other monthly averages

UV index Best time to go?

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
Map showing location of Helsinki (60.60778, 21.4381)

Top Finland locations

Change units