Annual mean 7°C · wettest around January · prevailing wind SW
Warmest
20.3 °C
Coldest
-4.1 °C
Wettest
37%
Windiest
7.1 m/s
Prevailing
SW
6.0 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Helsinki over the whole year is 7°C. July is the hottest month, with highs of about 19°C; January is the coldest, with lows of about -3°C. The rainy (wet) season in Helsinki runs from November to March, peaking in January with a 35% chance of rain on a given day. The dry season is April to October; May is the driest month, at 12%. Winds in Helsinki are highest in January, averaging 6.6 m/s (24 km/h), and lightest in July, at 4.9 m/s (18 km/h). The prevailing wind is from the SW. The clearest skies in Helsinki come in June, when the sky is typically 43% covered; December is the cloudiest month, at 83%.
Month by month Helsinki climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
-3°C
-3°C
-9°C
35%
80%
6.6 m/s
0
0
0
February
-2°C
-3°C
-8°C
34%
75%
6.2 m/s
0
0
0
March
1°C
-2°C
-6°C
26%
64%
5.7 m/s
0
0
1
April
6°C
2°C
-1°C
19%
54%
5.5 m/s
1
0
10
May
12°C
8°C
6°C
12%
45%
5.0 m/s
12
0
43
June
17°C
14°C
13°C
16%
43%
5.1 m/s
37
4
71
July
19°C
16°C
17°C
16%
46%
4.9 m/s
60
10
72
August
18°C
15°C
16°C
15%
51%
5.2 m/s
59
3
79
September
14°C
11°C
11°C
19%
57%
5.4 m/s
21
0
68
October
8°C
6°C
3°C
16%
71%
6.4 m/s
0
0
22
November
3°C
3°C
-3°C
29%
81%
6.5 m/s
0
0
4
December
-0°C
-1°C
-7°C
26%
83%
6.5 m/s
0
0
0
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Helsinki weather by season
Year round, Helsinki has days of about -3°C at their warmest in January, its coolest month, and 19°C in July, its warmest; the coolest hours of the day run from -3°C to 16°C through the year, and the average temperature over the year is 7°C around the clock. Rain is most likely around January and least likely around May. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Helsinki weather in winterDecember to February
High -1°CLow -2°CRain 31%
Winter in Helsinki has typical daily highs of about -1°C and lows of about -2°C, with a 31% chance of rain on a given day.
Helsinki weather in springMarch to May
High 6°CLow 3°CRain 19%
Spring in Helsinki has typical daily highs of about 6°C and lows of about 3°C, with a 19% chance of rain on a given day.
Helsinki weather in summerJune to August
High 18°CLow 15°CRain 16%
Summer in Helsinki has typical daily highs of about 18°C and lows of about 15°C, with a 16% chance of rain on a given day.
Helsinki weather in autumnSeptember to November
High 8°CLow 7°CRain 21%
Autumn in Helsinki has typical daily highs of about 8°C and lows of about 7°C, with a 21% chance of rain on a given day.
When is the rainy season in Helsinki?
The rainy (wet) season in Helsinki runs from November to March, peaking in January with a 35% chance of rain on a given day. The dry season is April to October; May is the driest month, at 12%.
What time of year is Helsinki windiest?
Winds in Helsinki are highest in January, averaging 6.6 m/s (24 km/h), and lightest in July, at 4.9 m/s (18 km/h). The prevailing wind is from the SW.
What is the average temperature in Helsinki year round?
The average temperature in Helsinki over the whole year is 7°C. July is the hottest month, with highs of about 19°C; January is the coldest, with lows of about -3°C.