Weather in September 2025

Aarau weather in September 2025

°C °F

The average weather in Aarau in September

The temperatures in Aarau in September are quite cold with temperatures between 8°C and 20°C, warm clothes are a must.

You can expect about 3 to 8 days of rain in Aarau during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Our weather forecast can give you a great sense of what weather to expect in Aarau in September 2025.

If you’re planning to visit Aarau in the near future, we highly recommend that you review the 14 day weather forecast for Aarau before you arrive.

Temperatures
20° / 8°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
109
mm
Sun Hours
10.8
Hrs

Explore the weather in Aarau in other months

Aarau annual weather

Month Temperatures Rainy Days Dry Days Snowy Days Rainfall Weather More details
January 4° / -4° 9 10 12 135 mm
Awful
February 5° / -4° 8 9 12 106 mm
Awful
March 10° / -1° 7 17 7 101 mm
Awful
April 15° / 2° 7 21 2 110 mm
Bad
May 18° / 5° 11 19 0 213 mm
Ok
June 22° / 9° 12 18 0 221 mm
Ok
July 24° / 11° 10 21 0 216 mm
Good
August 24° / 11° 9 22 0 180 mm
Good
September 20° / 8° 5 25 0 109 mm
Good
October 15° / 4° 6 24 0 120 mm
Good
November 9° / 1° 7 18 5 122 mm
Awful
December 5° / -3° 10 12 10 151 mm
Awful

Weather in Aarau in September - FAQ

What is the average temperature in Aarau in September?
The average temperature in Aarau in September is 8/20° C.
What is the chance of rain in Aarau in September?
On average, there are 5 rainy days in Aarau during September.
Weather wise, is September a good time to visit Aarau?
The weather in Aarau in September is good.
Can it snow in Aarau in September?
On average, there are 0 snowy days in Aarau in September.
More about the weather in Aarau