What to pack for Montréal in May
- long sleeves and a warm layer
- a medium jacket
- a compact umbrella or rain shell — rain is frequent
Humidity averages 62%; max daily wind around 20 km/h.
How May compares
Best months in Montréal: May–July & September. See the full best time to visit Montréal guide.
Montréal in May: the details
In May, Montréal sees average daytime highs of 18°C (65°F) and overnight lows of 8°C (46°F). Rainfall totals roughly 71 mm across 9.3 rainy days, and the sun shines about 10.4 hours per day with 14.7 hours of daylight mid-month. Relative humidity averages 62%.
In context: May is the 5th-warmest month and the driest in Montréal. The sunniest month is July (11.8 h/day).
| Metric | May average |
|---|---|
| Daytime high | 18°C / 65°F |
| Overnight low | 8°C / 46°F |
| Rainfall | 71 mm over 9.3 rainy days |
| Sunshine | 10.4 h/day (14.7 h daylight) |
| Humidity | 62% |
| Travel score | 9.5 / 10 |
These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for Montréal, Canada (45.51, -73.59) — see our methodology. Actual conditions vary year to year.
Not set on Montréal? Browse the best places to visit in May ranked by travel score.
Frequently asked questions
How hot is Montréal in May?
Daytime highs in Montréal in May average 18°C (65°F); nights drop to about 8°C.
Does it rain in Montréal in May?
Expect around 9.3 rainy days and 71 mm of rainfall in May.
Is May a good time to visit Montréal?
May is one of the best months to visit Montréal. Overall travel score: 9.5/10. The best months are May–July & September.
Also good in May, near Montréal
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