Montréal
Canada · North America
Year-round range: 9°F to 79°F
September
Excellent conditions this month
Your monthly fit score
Comfort fit by month.
Climate details▼
Temperature
Average highs and lows.
September has comfortable temperatures — not too hot, not too cold.
Shaded band = typical daily swing (P10 of night lows to P90 of afternoon peaks) — spans wider than avg high/low lines because it captures day-to-day variation.
| = SepPrecipitation
Monthly precipitation, wet-day risk, and snow signal where relevant.
September has moderate rainfall — occasional showers but mostly manageable.
Sunshine
Average hours of bright sun per day.
September has decent sunshine — a mix of sun and cloud.
Clear sky
Clear-sky share is the inverse of average cloud cover (100% minus cloud cover). Band labels follow standard meteorological categories; distribution within each band varies by day.
Air comfort by month
Humidity and heat feel by month.
September is mostly comfortable — low heat and humidity pressure.
Time-of-day patterns
Typical hourly rhythm for September.
Temperature by hour
Temperature by hour and month
Typical temperature through the day across the year (1996-2025 normals, local time). Shaded cells are nighttime.
In September, afternoons reach about 69° and nights settle near 56°.
▶Full month-by-month data
| Month | High °F | Low °F | Rain days | Rain (in) | Sun h/day | Humidity |
|---|---|---|---|---|---|---|
| Jan | 24°F | 9°F | 13 | 3.2in | 2.9h | 75.42857142857142% |
| Feb | 27°F | 11°F | 11 | 2.6in | 3.7h | 73% |
| Mar | 38°F | 22°F | 12 | 2.9in | 4.4h | 68% |
| Apr | 52°F | 35°F | 13 | 3.8in | 4.9h | 61.99999999999999% |
| May | 66°F | 48°F | 14 | 3.3in | 5.8h | 61.857142857142854% |
| Jun | 75°F | 59°F | 15 | 3.8in | 6.2h | 67% |
| Jul | 79°F | 64°F | 16 | 3.7in | 7.1h | 70.28571428571428% |
| Aug | 77°F | 63°F | 13 | 3.7in | 6.5h | 71.42857142857143% |
| Sep | 70°F | 56°F | 10 | 3.2in | 5.9h | 72.57142857142857% |
| Oct | 57°F | 44°F | 13 | 4.1in | 4.1h | 72.28571428571428% |
| Nov | 43°F | 33°F | 13 | 3.1in | 3.1h | 73.28571428571428% |
| Dec | 31°F | 19°F | 15 | 3.7in | 2.5h | 75.42857142857142% |