World Resorts Sweden Vasteras Weather

Vasteras weather in September

Weather in Vasteras: September

Average day temperature: 61.1°F
Average night temperature: 50.2°F
Sea water temperature: 58.2°F
Number of sunny days: 9 days
Day length: 11.5 - 14.1 hours
Number of rainy days: 2 days
Precipitation totals: 1.2 in.

Air temperature in September, °F

Show year:
2025
2024
2023

The highest day temperature during September of 2025 was 74°F. At the same time the lowest night temperature was 41°F. Daily and nightly averages during September were 64.5°F and 52.8°F.

Sea water temperature in Vasteras in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 61.6°F. The highest and lowest sea temperatures during the month were 64.2°F and 58.5°F.

Sunny, partly cloudy and cloudy days

Mostly all days in September are partly cloudy but sunny or cloudy days are also possible.

Precipitation total in September, in.

Precipitation total value in Vasteras in September is 1.1 in. Other months of the year show relatively similar values.

Wind speed in September, mph

The average wind speed value in September is 7.4 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: 6.7.

Best time for vacation in Vasteras

Sunniest months:
June 13 days
May 12 days
July 11 days
Warmest months:
July 70.2 °F
August 68.4 °F
June 66.9 °F
Warmest sea temp:
August 62.5 °F
July 59.6 °F
September 58.3 °F
Coldest months:
January 29.8 °F
February 32.4 °F
December 32.9 °F
Rainiest months:
July 4 days
June 3 days
August 3 days
Windiest months:
January 9.2 mph
December 9.2 mph
February 8.9 mph

Vasteras on a weather map

Vasteras
+39°F
W 3 mph
Feels like: +37°F
Precip.: 100%
Places in Sweden:
Name
°F
+39°F
+41°F
+37°F
+41°F
+41°F
+41°F
+43°F
+41°F
+34°F
+39°F
+43°F
+37°F
+32°F
24 Hours Forecast
Vasteras
Local time: 08:37
December 05, friday
0900
39°F
W
3 mph
1200
41°F
W
3 mph
1500
41°F
W
3 mph
1800
41°F
W
3 mph
2100
39°F
W
4 mph
December 06, saturday
0000
39°F
W
5 mph
0300
41°F
W
8 mph
0600
41°F
W
9 mph
Units of measurement: °C / °F