In general the best time to visit Helsinki is probably July, when the weather is usually great. The hottest months are June, July, August, while the coldest months are January, February, December.
April, May, June, July usually has good weather. Average maximum temperature reaches +20°C during July.
In February, March, August, September, October the weather is average. Expect around 27 rainy days, and the precipitation amounts to approximately 80 mm in October.
January, November, December bring not the best weather. January is the coldest month with the temperature going down to -7°C.
Climate in Helsinki
Here is the detailed breakdown of the climate in Helsinki for each month:
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Maximum Temperature
+9°C
+8°C
+13°C
+19°C
+26°C
+31°C
+32°C
+29°C
+22°C
+18°C
+13°C
+10°C
Average Maximum Temperature
-2°C
-3°C
+1°C
+6°C
+12°C
+16°C
+20°C
+19°C
+14°C
+9°C
+4°C
0°C
Minimum Temperature
-33°C
-29°C
-19°C
-10°C
-2°C
+2°C
+7°C
+3°C
0°C
-8°C
-17°C
-24°C
Humidity, %
86
84
79
72
68
72
71
76
80
83
86
87
Rain, mm
12
10
9
24
42
58
66
79
77
80
55
27
Snow, mm
43
33
28
11
0
0
0
0
0
4
24
40
Average wind speed, m/s
4
3
3
3
3
3
3
3
3
4
4
4
Sunny Days
3
4
8
10
13
11
12
10
6
5
2
2
Cloud Days
21
19
18
16
13
13
13
13
16
17
18
20
Rainy Days
1
1
1
3
5
6
6
8
8
9
7
3
Snowy Days
6
4
4
1
0
0
0
0
0
0
3
6
Average Temperature
Here are the average maximum and minimum temperatures in Helsinki during the whole year:
The hottest month in Helsinki is July with average maximum temperature going up to +20°C. The coldest month is February with the lowest temperatures of -7°C.
Humidity
The temperature feels different depending on humidity. Here is how humidity in Helsinki looks throughout the year, in %:
The most humid month in Helsinki is December with average humidity going up to 87%. The least humid month is May with an average humidity of 68%.
Rain
Amount of rainfall in mm. in Helsinki during the whole year based on historical data:
The sunniest and driest month is May with approximately 13 sunny days and a total precipitation of around 42 mm. The rainiest and wettest month is October with approximately 9 rainy days and 80 mm of total precipitation.
Snow
Amount of snow in mm. in Helsinki during the whole year based on historical data:
The snowiest month is January with approximately 6 snowy days.
FAQ
Frequently asked questions about the weather in Helsinki:
What is the hottest month in Helsinki?
The hottest month in Helsinki is July with average maximum temperature of +20°C.
What is the coldest month in Helsinki?
The coldest month in Helsinki is February with minimum temperatures of -7°C.
Is Helsinki worth visiting in winter?
Winter is usually not the best time to go to Helsinki.
When does it rain the least in Helsinki?
if you're looking to visit Helsinki when it rains the least, you should plan your trip for October, August, September. During this time, rainfall is rare with the driest month being March with only 9 mm of rain.
Other cities in Finland
Check out the weather for other cities in Finland.
For this page, we’ve looked at the typical weather in Helsinki, based on historical hourly weather data from January 1, 1979, to December 31, 2022.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.