Ottawa Climate: Weather by Month and Best Time to Visit
Best months for Ottawa: September, August, July.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 0°C | -8°C | 55 mm | 8 | – | – | 4.0 |
| February | 3°C | -5°C | 51 mm | 7 | – | – | 4.6 |
| March | 10°C | 0°C | 72 mm | 10 | – | – | 5.7 |
| April | 17°C | 6°C | 109 mm | 12 | – | – | 6.5 |
| May | 23°C | 12°C | 122 mm | 13 | – | – | 7.1 |
| June | 27°C | 17°C | 112 mm | 12 | – | – | 7.3 |
| July | 29°C | 19°C | 97 mm | 11 | – | – | 7.6 |
| August | 28°C | 18°C | 89 mm | 10 | – | – | 7.8 |
| September | 25°C | 14°C | 79 mm | 8 | – | – | 8.0 |
| October | 18°C | 7°C | 78 mm | 9 | – | – | 7.3 |
| November | 10°C | 1°C | 68 mm | 9 | – | – | 5.9 |
| December | 3°C | -4°C | 56 mm | 8 | – | – | 4.5 |