Measurements:
°C
°F
Helsinki
42°F
N 24 mph
Feels like: 32°F
Precip: 100%
World Resorts Finland Helsinki Weather September Weather in Helsinki

Helsinki Weather: September

Average Day Temperature: 60.2°F
Average Night Temperature: 53.0°F
Sea Water Temperature: 59.7°F
Number of Sunny Days: 10 days
Sunshine Hours: 11.5 - 14.2 hours
Number of Rainy Days: 4 days
Precipitation Totals: 1.9 in

Air Temperature in September, °F

Select Year: 2024 2023 2022

The highest day temperature in September 2024 was 74°F. The lowest night temperature was 41°F. The average values for day and night temperatures during September were 63.9°F и 56.3°F respectivly.

Helsinki Water Sea Temperature in September, °F

Select Year: 2024 2023 2022

The average sea surface temperature in September 2024 for Helsinki was 63.0°F. The maximum and minimum values were 60.0°F and 66.0°F respectively.

Sunny, Cloudy and Gloomy days

You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.

Precipitation Totals in September, in

Precipitation total in September for Helsinki is 1.9 in.

Wind Speed in September, mph

The average wind speed in September is 10.3 mph.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Helsinki in September is 6.9 hours.

Best Time to Visit Helsinki
The most sunny months:
July 15 days
June 15 days
May 14 days
The most warm months:
July 70.7 °F
August 69.2 °F
June 65.0 °F
Warmest sea temperature:
August 64.6 °F
July 63.1 °F
September 59.7 °F
The most cold months:
January 25.6 °F
February 26.7 °F
December 31.6 °F
The most rainy months:
August 5 days
September 4 days
July 4 days
The most windy months:
December 12 mph
November 12 mph
January 11 mph

Helsinki on the Weather Map

Finland Resorts:
NAME
Espoo +42
Helsinki +42
Juvaskyla +34
Kemi +34
Koli National Park +30
Kotka +38
Lahti +36
Lappeenranta +34
Oulu +34
Pori +44
Porvoo +40
Saariselka +24
Turku +46
Vaasa +42
Vantaa +42
24 Hours Weather Forecast
Helsinki
Local time: 08:03
25 nov, monday
0900 42°F
N
24 mph
1200 44°F
NE
24 mph
1500 46°F
NE
22 mph
1800 46°F
NE
21 mph
2100 46°F
NE
19 mph
26 nov, tuesday
0000 46°F
NE
21 mph
0300 46°F
NE
21 mph
0600 46°F
NE
19 mph