Waterloo Climate: Weather by Month and Best Time to Visit
Best months for Waterloo: September, August, July.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -3°C | -11°C | 35 mm | 7 | – | – | 4.2 |
| February | 0°C | -9°C | 37 mm | 6 | – | – | 4.2 |
| March | 8°C | -2°C | 63 mm | 9 | – | – | 5.3 |
| April | 16°C | 4°C | 109 mm | 11 | – | – | 6.5 |
| May | 22°C | 11°C | 129 mm | 13 | – | – | 7.1 |
| June | 27°C | 16°C | 131 mm | 12 | – | – | 7.2 |
| July | 28°C | 18°C | 106 mm | 10 | – | – | 7.6 |
| August | 27°C | 17°C | 100 mm | 10 | – | – | 7.7 |
| September | 24°C | 12°C | 94 mm | 8 | – | – | 7.9 |
| October | 16°C | 6°C | 72 mm | 8 | – | – | 7.1 |
| November | 8°C | -1°C | 55 mm | 8 | – | – | 5.6 |
| December | 0°C | -8°C | 42 mm | 7 | – | – | 4.2 |