Average annual temperature is 11.1 °C
Absolute maximum temperature: 32.3 °C
Absolute minimum temperature: -16.7 °C
Number of sunny days: 174 days
Number of rainy days: 174 days
Number of snow days: 17 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) | 15.4 | 15.0 | 16.7 | 25.5 | 30.5 | 32.1 | 32.3 | 31.6 | 31.4 | 28.0 | 17.4 | 14.5 |
| Average daytime temperature (°C) | 3.6 | 6.4 | 7.5 | 16.1 | 21.6 | 26.7 | 28.4 | 26.5 | 23.7 | 16.4 | 9.6 | 6.9 |
| Average temperature (°C) | 0.3 | 0.8 | 2.4 | 9.5 | 15.3 | 20.4 | 22.9 | 21.3 | 18.6 | 12.0 | 4.7 | 3.7 |
| Average night temperature (°C) | -2.4 | -3.2 | -1.3 | 4.0 | 9.2 | 14.7 | 17.9 | 16.6 | 14.1 | 8.4 | 1.0 | 1.2 |
| Absolute minimum temperature (°C) | -15.1 | -16.7 | -7.8 | -3.9 | 1.9 | 9.4 | 14.2 | 10.7 | 8.3 | -3.9 | -8.1 | -4.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.0 | 7.3 | 6.6 | 8.9 | 10.6 | 10.8 | 11.8 | 10.5 | 8.7 | 6.7 | 6.7 | 3.8 |
| Precipitation (mm) | 69 | 94 | 176 | 92 | 50 | 50 | 97 | 92 | 31 | 108 | 25 | 72 |
| Sunny days | 10 | 15 | 13 | 15 | 19 | 15 | 10 | 16 | 18 | 9 | 23 | 11 |
| Rainy days | 15 | 11 | 13 | 15 | 12 | 15 | 21 | 15 | 12 | 21 | 6 | 18 |
| Snow days | 6 | 2 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 |
The best time to visit Waterloo during the most sunny months:
The largest precipitation sum in Waterloo is at