When to go · Aarau, Switzerland
Best Time to Visit Aarau
Aim for September, August and June: that's when Aarau's weather is at its best. The full month-by-month picture is below.
Go now
September, August, June
Comfortable and drier
Shoulder
October, July, February
Fewer crowds, a trade-off
Think twice
December, January
Hottest is August (25°C)
Aarau weather, month by month
| Month | High | Low | Rain | Feel |
|---|---|---|---|---|
| Jan | 5°C / 41°F | -1°C / 30°F | 87mm | cold, some rain |
| Feb | 8°C / 46°F | 0°C / 32°F | 57mm | cold, mostly dry |
| Mar | 12°C / 54°F | 1°C / 34°F | 72mm | cool, some rain |
| Apr | 13°C / 55°F | 4°C / 39°F | 95mm | cool, some rain |
| May | 18°C / 64°F | 9°C / 48°F | 112mm | mild, some rain |
| JunBEST | 25°C / 77°F | 14°C / 57°F | 117mm | warm, some rain |
| Jul | 25°C / 77°F | 15°C / 59°F | 135mm | warm, wet |
| AugBEST | 25°C / 77°F | 15°C / 59°F | 90mm | warm, some rain |
| SepBEST | 22°C / 72°F | 12°C / 54°F | 80mm | mild, some rain |
| Oct | 17°C / 63°F | 8°C / 46°F | 70mm | mild, some rain |
| Nov | 9°C / 48°F | 3°C / 37°F | 133mm | cold, wet |
| Dec | 6°C / 43°F | 0°C / 32°F | 137mm | cold, wet |
Averages from Open-Meteo ERA5 climate reanalysis, 2019 to 2023. Highs and lows are daily averages for each month; rain is the monthly total. Tap a month for a detailed guide.
Want the timing decided for you? A Local Friend in Aarau plans around the seasons for you.