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July is the hottest month in Helsinki with an average temperature of 17°C (62°F) and the coldest is February at -5°C (22°F). The wettest month is August with an average of 90mm of rain. The best month to swim in the sea is in August when the average sea temperature is 13°C (55°F).
Average Temperature Helsinki
What is Average Temperature?
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month
What is Average Temperature?
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month
Average High Low Temperature Helsinki
What is Average High Low Temperature?
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily
What is Average High Low Temperature?
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily
Average Rainfall Helsinki
What is Average Rainfall?
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years
What is Average Rainfall?
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years
Average Sea Temperature Helsinki
What is Average Sea Temperature?
Average daily sea temperatures and divided by the number of days in the month. Sea Temperatures are taken from buoys, ships and even satellites can calculate sea temperature based on energy that is radiated from the sea's surface
Average daily sea temperatures and divided by the number of days in the month. Sea Temperatures are taken from buoys, ships and even satellites can calculate sea temperature based on energy that is radiated from the sea's surface
What is Average Sea Temperature?
Average daily sea temperatures and divided by the number of days in the month. Sea Temperatures are taken from buoys, ships and even satellites can calculate sea temperature based on energy that is radiated from the sea's surface
Average daily sea temperatures and divided by the number of days in the month. Sea Temperatures are taken from buoys, ships and even satellites can calculate sea temperature based on energy that is radiated from the sea's surface
More Annual Averages
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Helsinki : Next 24-Hour Weather
Today - 18th May 2026
Sunrise 04:33
Sunset 22:01
18:00
20°C
(68°F)
19:00
15°C
(58°F)
20:00
15°C
(58°F)
21:00
14°C
(57°F)
22:00
13°C
(55°F)
23:00
12°C
(53°F)
Tomorrow - 19th May 2026
Sunrise 04:33
Sunset 22:01
0:00
12°C
(52°F)
1:00
11°C
(52°F)
2:00
12°C
(53°F)
3:00
12°C
(53°F)
4:00
11°C
(52°F)
5:00
12°C
(52°F)
6:00
12°C
(53°F)
7:00
12°C
(53°F)
8:00
13°C
(55°F)
9:00
14°C
(56°F)
10:00
15°C
(59°F)
11:00
16°C
(60°F)
12:00
16°C
(61°F)
13:00
17°C
(63°F)
14:00
19°C
(65°F)
15:00
19°C
(65°F)
16:00
19°C
(65°F)
17:00
19°C
(66°F)
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Helsinki
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