World Resorts Finland Helsinki Weather

Helsinki weather in September

Weather in Helsinki: September

Average day temperature: 59.2°F
Average night temperature: 52.7°F
Sea water temperature: 58.8°F
Number of sunny days: 10 days
Day length: 11.5 - 14.2 hours
Number of rainy days: 4 days
Precipitation totals: 1.9 in.

Air temperature in September, °F

Show year:
2024
2023
2022

The highest day temperature during September of 2024 was 71°F. At the same time the lowest night temperature was 41°F. Day and night temperature averages during September were 62.5°F and 55.6°F.

Sea water temperature in Helsinki in September, °F

Show year:
2024
2023
2022

The average sea water temperature in September of 2024 was 61.7°F. The highest and lowest sea temperatures during the month were 64.4°F and 59.0°F.

Sunny, partly cloudy and cloudy days

Number of sunny, partly cloudy and cloudy days in September is almost equal.

Precipitation total in September, in.

Precipitation total value in Helsinki in September is 1.7 in. Other months of the year show relatively similar values.

Wind speed in September, mph

The average wind speed value in September is 9.8 mph

Average sunny hours

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 7.0.

Best time for vacation in Helsinki

Sunniest months:
July 15 days
June 15 days
May 14 days
Warmest months:
July 68.6 °F
August 67.3 °F
June 63.5 °F
Warmest sea temp:
August 63.1 °F
July 61.8 °F
September 58.8 °F
Coldest months:
January 28.1 °F
February 29.0 °F
December 33.4 °F
Rainiest months:
August 5 days
September 4 days
July 4 days
Windiest months:
December 12.8 mph
November 12.0 mph
January 11.7 mph

Helsinki on a weather map

Helsinki
+46°F
SE 11 mph
Feels like: +41°F
Precip.: 0%
Places in Finland:
Name
°F
+46°F
+46°F
+39°F
+45°F
+37°F
+41°F
+37°F
+46°F
+46°F
+37°F
+45°F
+46°F
+46°F
+36°F
24 Hours Forecast
Helsinki
Local time: 21:47
November 06, wednesday
0000
45°F
E
9 mph
0300
43°F
E
11 mph
0600
45°F
E
12 mph
0900
45°F
E
12 mph
1200
48°F
E
12 mph
1500
48°F
E
11 mph
1800
45°F
E
8 mph
2100
43°F
SE
7 mph
Units of measurement: °C / °F