Weather · Aarau, Switzerland
Aarau Weather in September
Expect mild, some rain in Aarau through September: highs near 22°C, lows around 12°C, 80mm of rain across the month. It's one of the best months to visit.
Avg high
22°C
72°F
Avg low
12°C
54°F
Rainfall
80mm
#9 wettest of 12
What to pack
Summer clothes by day; a light layer for evenings. Bring a compact umbrella for the odd shower.
Timing a trip around the weather? A Local Friend in Aarau builds it around the season for you.