Average annual temperature is 11.0 °C
Absolute maximum temperature: 38.6 °C
Absolute minimum temperature: -26.9 °C
Number of sunny days: 200 days
Number of rainy days: 141 days
Number of snow days: 24 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) | 8.4 | 10.7 | 22.6 | 26.0 | 31.1 | 31.9 | 34.0 | 38.6 | 34.9 | 31.7 | 17.8 | 13.3 |
| Average daytime temperature (°C) | 0.3 | 3.3 | 6.9 | 16.0 | 24.3 | 28.5 | 28.5 | 28.9 | 26.7 | 17.3 | 9.9 | 6.1 |
| Average temperature (°C) | -3.9 | -2.4 | 1.3 | 9.6 | 17.6 | 22.7 | 23.0 | 23.6 | 20.7 | 12.6 | 4.8 | 1.7 |
| Average night temperature (°C) | -6.9 | -6.8 | -2.9 | 4.6 | 11.6 | 17.0 | 17.7 | 18.7 | 15.7 | 8.5 | 0.9 | -1.1 |
| Absolute minimum temperature (°C) | -26.9 | -25.1 | -14.6 | -3.9 | 1.6 | 9.0 | 12.2 | 12.7 | 10.0 | -4.6 | -13.0 | -7.3 |
| 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) | 4.3 | 7.0 | 7.4 | 9.4 | 11.9 | 12.1 | 12.4 | 11.5 | 10.0 | 7.2 | 7.1 | 4.4 |
| Precipitation (mm) | 57 | 46 | 74 | 48 | 67 | 32 | 81 | 52 | 55 | 65 | 12 | 37 |
| Sunny days | 19 | 19 | 14 | 15 | 19 | 12 | 13 | 17 | 16 | 17 | 22 | 17 |
| Rainy days | 6 | 7 | 10 | 13 | 12 | 18 | 18 | 14 | 14 | 13 | 7 | 9 |
| Snow days | 6 | 2 | 7 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 5 |
The best time to visit Waterloo during the most sunny months:
The largest precipitation sum in Waterloo is at