Average annual temperature is 13.2 °C
Absolute maximum temperature: 37.2 °C
Absolute minimum temperature: -15.9 °C
Number of sunny days: 204 days
Number of rainy days: 150 days
Number of snow days: 11 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) | 15.8 | 14.4 | 22.9 | 28.0 | 31.7 | 34.5 | 36.7 | 37.2 | 33.8 | 30.8 | 21.9 | 15.9 |
| Average daytime temperature (°C) | 4.8 | 8.3 | 10.0 | 19.1 | 26.0 | 30.4 | 30.6 | 28.9 | 27.5 | 19.5 | 12.1 | 8.2 |
| Average temperature (°C) | 0.3 | 2.1 | 4.4 | 11.9 | 19.3 | 24.1 | 24.7 | 24.0 | 21.2 | 14.4 | 6.7 | 4.1 |
| Average night temperature (°C) | -2.8 | -2.6 | 0.4 | 6.2 | 12.9 | 18.0 | 19.5 | 19.7 | 16.0 | 10.3 | 2.3 | 1.2 |
| Absolute minimum temperature (°C) | -13.8 | -15.9 | -11.1 | -1.3 | 4.9 | 10.2 | 15.3 | 13.1 | 11.9 | -2.3 | -9.0 | -6.5 |
| 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) | 9.7 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 10.0 | 9.3 |
| 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) | 5.2 | 7.6 | 6.8 | 10.0 | 11.9 | 12.4 | 12.2 | 10.4 | 10.2 | 7.3 | 7.7 | 4.8 |
| Precipitation (mm) | 56 | 74 | 98 | 51 | 41 | 17 | 111 | 210 | 19 | 79 | 16 | 88 |
| Sunny days | 15 | 18 | 10 | 16 | 22 | 20 | 14 | 15 | 19 | 15 | 25 | 15 |
| Rainy days | 9 | 8 | 20 | 14 | 9 | 10 | 17 | 16 | 11 | 16 | 4 | 16 |
| Snow days | 7 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
The best time to visit Waterloo during the most sunny months:
The largest precipitation sum in Waterloo is at