Best time to visit Ottawa, Canada
Based on 2020–2024 of daily weather data, the best months to visit Ottawa are September, May, June — when temperatures are comfortable, rainfall is low, and sunshine is plentiful.
Months ranked by travel comfort
| Rank | Month | High | Low | Precip | Rainy days | Sun | Score |
|---|---|---|---|---|---|---|---|
| 1 ★ | September | 21.3° | 12.6° | 396.7 mm | 65 | 9.5 h | 84 |
| 2 ★ | May | 19.6° | 7.7° | 378.2 mm | 75 | 10.8 h | 80 |
| 3 ★ | June | 24.2° | 13.9° | 609.4 mm | 101 | 10.8 h | 78 |
| 4 | July | 26.4° | 17.3° | 584.6 mm | 105 | 11.8 h | 78 |
| 5 | August | 25.1° | 16.6° | 684.9 mm | 102 | 10.6 h | 75 |
| 6 | October | 14.8° | 6.9° | 415.3 mm | 91 | 6.6 h | 65 |
| 7 | April | 11.7° | 0.9° | 527.8 mm | 83 | 8.2 h | 55 |
| 8 | November | 6.8° | 0.1° | 338.9 mm | 88 | 5.4 h | 48 |
| 9 | March | 4.9° | -5.5° | 380.4 mm | 88 | 7.4 h | 43 |
| 10 | February | -1.5° | -12.1° | 327.4 mm | 88 | 6.2 h | 34 |
| 11 | January | -3.4° | -12° | 393.8 mm | 89 | 4.7 h | 29 |
| 12 | December | 0.5° | -5.7° | 483.9 mm | 98 | 3.4 h | 26 |
Score (0–100) blends ideal-temperature comfort (50%), low-rainfall (30%), and sunshine (20%). Higher is better for a typical sightseeing trip.
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