Weather · Aarau, Switzerland
Aarau Weather in January
January in Aarau averages 5°C by day and -1°C at night, with about 87mm of rain. That makes it not the easiest month, weather-wise.
Avg high
5°C
41°F
Avg low
-1°C
30°F
Rainfall
87mm
#8 wettest of 12
What to pack
Warm layers and a proper coat. 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.