Ottawa weather by month
Ottawa has warm summers, very cold winters and moderate rain. The most pleasant months are June and September.
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Month by month
Average daytime high, night low, rain or snow, how the air feels and how strong the sun is, 1991–2020. Best months are highlighted.
| Month | High | Low | Rain | Air | Sun |
|---|---|---|---|---|---|
| January | 22°F -5°C | 6°F -14°C | 2.4 in 62 mm | Dry | Weak sun |
| February | 26°F -3°C | 8°F -14°C | 2.2 in 57 mm | Dry | Moderate sun |
| March | 37°F 3°C | 19°F -7°C | 2.5 in 63 mm | Dry | Moderate sun |
| April | 52°F 11°C | 33°F 1°C | 3.1 in 78 mm | Dry | Sunny |
| May | 67°F 19°C | 46°F 8°C | 3.4 in 87 mm | Dry | Sunny |
| June | 76°F 25°C | 56°F 13°C | 3.6 in 92 mm | Comfortable | Strong sun |
| July | 81°F 27°C | 60°F 16°C | 3.8 in 96 mm | A little humid | Strong sun |
| August | 79°F 26°C | 59°F 15°C | 3.6 in 92 mm | A little humid | Sunny |
| September | 72°F 22°C | 51°F 11°C | 3.2 in 82 mm | Comfortable | Sunny |
| October | 57°F 14°C | 40°F 5°C | 3.5 in 89 mm | Dry | Moderate sun |
| November | 43°F 6°C | 29°F -1°C | 3.0 in 75 mm | Dry | Weak sun |
| December | 29°F -1°C | 16°F -9°C | 3.0 in 76 mm | Dry | Weak sun |
Cities with a climate like Ottawa
Whole-year match out of 100, one city per country, seasons lined up across the equator.