Average annual temperature is 10.6 °C
Absolute maximum temperature: 32.1 °C
Absolute minimum temperature: -21.6 °C
Number of sunny days: 154 days
Number of rainy days: 185 days
Number of snow days: 26 days
Look at detailed online map of Waterloo
* Weather data for Waterloo United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 11.7 | 15.1 | 16.8 | 26.4 | 30.8 | 31.2 | 32.1 | 31.8 | 31.5 | 28.4 | 16.5 | 14.7 |
| Average daytime temperature (°C) | 3.1 | 5.4 | 6.8 | 15.7 | 21.8 | 26.1 | 27.9 | 26.1 | 23.3 | 15.9 | 8.7 | 6.7 |
| Average temperature (°C) | -0.1 | -0.2 | 1.8 | 9.3 | 14.7 | 19.9 | 22.3 | 20.6 | 18.3 | 11.8 | 4.2 | 3.5 |
| Average night temperature (°C) | -2.6 | -4.0 | -2.0 | 4.2 | 8.5 | 14.3 | 17.5 | 16.1 | 14.1 | 8.5 | 0.6 | 1.3 |
| Absolute minimum temperature (°C) | -21.6 | -16.7 | -12.0 | -4.6 | 1.5 | 9.5 | 14.0 | 10.3 | 8.0 | -1.0 | -7.9 | -4.0 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.9 | 12.5 | 11.1 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 2.6 | 7.2 | 6.6 | 8.6 | 10.3 | 11.0 | 11.6 | 10.2 | 8.1 | 5.9 | 6.3 | 3.1 |
| Precipitation (mm) | 61 | 80 | 122 | 99 | 23 | 83 | 104 | 98 | 72 | 106 | 57 | 57 |
| Sunny days | 7 | 14 | 10 | 11 | 23 | 18 | 7 | 14 | 14 | 10 | 17 | 9 |
| Rainy days | 14 | 10 | 16 | 18 | 8 | 12 | 24 | 17 | 16 | 20 | 10 | 20 |
| Snow days | 10 | 4 | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 2 |
The best time to visit Waterloo during the most sunny months:
The largest precipitation sum in Waterloo is at