Average annual temperature is 11.5 °C
Absolute maximum temperature: 33.8 °C
Absolute minimum temperature: -9.1 °C
Number of sunny days: 137 days
Number of rainy days: 220 days
Number of snow days: 8 days
Look at detailed online map of Aarau
* Weather data for Aarau Switzerland is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 15.0 | 15.2 | 19.2 | 19.5 | 24.2 | 30.6 | 33.8 | 33.8 | 29.6 | 26.2 | 15.4 | 12.1 |
| Average daytime temperature (°C) | 5.9 | 8.0 | 11.5 | 12.5 | 18.8 | 26.0 | 25.7 | 25.6 | 24.4 | 18.6 | 9.1 | 6.7 |
| Average temperature (°C) | 3.0 | 3.0 | 6.9 | 8.2 | 14.1 | 20.3 | 20.4 | 20.4 | 18.5 | 13.1 | 6.2 | 3.8 |
| Average night temperature (°C) | 0.1 | -0.8 | 2.4 | 4.0 | 9.5 | 14.0 | 15.3 | 15.4 | 12.8 | 8.5 | 3.1 | 0.9 |
| Absolute minimum temperature (°C) | -7.2 | -6.4 | -3.6 | -2.9 | 6.1 | 10.6 | 10.2 | 9.4 | 6.3 | 1.9 | -2.3 | -9.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 10.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 |
| Daylight mean duration (h) | 9.0 | 10.3 | 11.9 | 13.6 | 15.1 | 15.9 | 15.5 | 14.2 | 12.6 | 10.9 | 9.3 | 8.5 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 2.9 | 6.3 | 6.8 | 6.8 | 9.3 | 13.6 | 11.8 | 10.2 | 10.1 | 7.5 | 3.4 | 2.9 |
| Precipitation (mm) | 51 | 20 | 141 | 125 | 92 | 35 | 185 | 110 | 38 | 99 | 232 | 168 |
| Sunny days | 9 | 15 | 11 | 4 | 10 | 18 | 7 | 10 | 22 | 16 | 4 | 11 |
| Rainy days | 18 | 11 | 20 | 26 | 21 | 12 | 24 | 21 | 8 | 15 | 26 | 18 |
| Snow days | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
The best time to visit Aarau during the most sunny months:
Months with the longest average daylight duration in Aarau:
The largest precipitation sum in Aarau is at