Measured, not vibes
Best Time to Visit Montreal
By measured weather comfort, the top months for Montreal are September, June, May — and RouteVerdict's editorial pick, which also weighs crowds and prices, is June, July, August, September. The table below is computed from ERA5 reanalysis data for 2020–2024, measured at Montreal (216 m elevation).
Month by month
Montreal weather and comfort, 2020–2024
| Month | Avg high | Wet days | Comfort | Season |
|---|---|---|---|---|
| January | -4.9°C / 23°F | 8.7 | 1 | |
| February | -3.1°C / 26°F | 9.7 | 1 | |
| March | 3.5°C / 38°F | 10.8 | 8 | |
| April | 10.8°C / 51°F | 10.2 | 32 | Shoulder |
| May | 18.8°C / 66°F | 7 | 77 | Best |
| June | 23.5°C / 74°F | 10.7 | 79 | Best |
| July | 25.4°C / 78°F | 11.5 | 74 | |
| August | 24°C / 75°F | 11.5 | 77 | |
| September | 20.1°C / 68°F | 7.3 | 81 | Best |
| October | 13.8°C / 57°F | 9.2 | 48 | Shoulder |
| November | 6.1°C / 43°F | 8.5 | 14 | |
| December | -0.5°C / 31°F | 11.2 | 3 |
Comfort is RouteVerdict's 0–100 score: 100·exp(−(high−23)²/162) × (1 − min(0.35, wet days × 0.02)). The full method is on the methodology page. Weather data by Open-Meteo.com (ERA5, CC BY 4.0), 2020–2024 normals. Wet day = ≥1 mm precipitation.
What the seasons are actually like
Traveling to Montreal month by month
Montreal's comfort score peaks in September at 81.1, with an average high of 20.1°C and 7.3 wet days, just ahead of June's 78.5 and May's 77.1. Winter is severe: January averages −4.9°C with a comfort score of just 0.7, and December isn't far behind at 2.6 — among the coldest conditions RouteVerdict measures. RouteVerdict's editorial pick spans June through September, the reliable warm-weather window, while April and October sit as shoulder months with comfort scores of 31.8 and 48.4.
FAQ
Montreal timing questions
What is the best month to visit Montreal?
By measured weather comfort (ERA5 2020–2024), the top months are September, June, and May, with September scoring highest. RouteVerdict's editorial pick is June, July, August, and September, which also weighs crowds, prices, and events.
What is the hottest month in Montreal?
July, with an average daily high of 25.4°C (78°F).
What is the rainiest month in Montreal?
July, averaging 11.5 days with at least 1 mm of precipitation.
When is shoulder season in Montreal?
October and April — the best-scoring months outside both the measured top three and RouteVerdict's editorial peak-season pick.
How cold does Montreal get in winter?
January averages −4.9°C with a comfort score of just 0.7 — the lowest of the year — and December isn't much better at 2.6.
What is Montreal's single best month for weather?
September, with an average high of 20.1°C, 7.3 wet days, and a comfort score of 81.1 — the highest measured for any month.