Travel Weather Fairy🎊 Featured event
Festival International de Jazz de Montréal
📅 June–July each year
Downtown venues and street-event areas can attract large crowds during the festival.
Check official source →🇨🇦 Canada · Quebec · Montreal
Montreal Weather in September
Early autumnWeather in Montreal during September is typically mild in the daytime and cool after sunset, based on 2016–2025 averages of 22°C (71°F) / 13°C (56°F). The 10-year average shows around 8 rainy days and about 69 mm of monthly precipitation, so some wet days are normal.
Avg high70.7°F 21.5°CAvg low55.7°F 13.1°CRainy days~8.2 daysMonthly rain69.3 mm
🧳 Packing guide
What to wear in Montreal in September
For what to wear in Montreal in September, long sleeves or a T-shirt with a light jacket make a practical combination. A compact umbrella is worth carrying for passing showers or wetter days.
Travel takeaway: For many travelers, these temperatures are comfortable for city sightseeing when you pack one flexible layer.
🗓️ Travel timing at a glance
Montreal: 12-month travel weather
Montreal has a long, cold, snowy winter and a warm summer. The seasonal contrast is large, so packing and outdoor comfort vary sharply by month.
JanSevere cold · SnowFebMidwinter · SnowMarLate winter · SnowAprSpringMaySpringJunEarly summerJulSummerAugSummerSepEarly autumnOctAutumnNovEarly winterDecWinter · Snow
Monthly labels summarize typical climate patterns for trip planning. Always check the latest forecast and tropical-storm alerts before departure.
🎉 Trip planning check
Montreal 2026 events & busy periods
Check major events, holidays and periods that may affect crowds, transport or opening hours.
⚠️ Busy / closure period
Winter festivals and deep-cold period
📅 January–February
Winter events are a draw, but extreme cold or heavy snow can make outdoor time and transport more difficult.
Check official source →Event dates, holiday schedules and opening hours can change. Recheck the linked official tourism or government source before departure.
Montreal in September · recent 3 years
Compare the most recent complete year with the two years before it. Daily high / low temperatures are shown in °F.
CalendarNo measurable rain🌧️ Rain⛈️ Thunderstorm❄️ SnowHigh / Low · °F
⭐ September 2025 · latest complete year☔ 7 days · 33.7 mm
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1
24.8°C/13.8°C
No rain
2
24.2°C/16.7°C
No rain
3
25.1°C/15.7°C
No rain
4
26°C/16.4°C
🌧️ 12.6 mm
5
23.2°C/12.8°C
🌧️ 2 mm
6
19.1°C/14.2°C
🌧️ 5.4 mm
7
18.4°C/13.4°C
🌧️ 1.1 mm
8
18°C/11.1°C
No rain
9
19.5°C/10.4°C
No rain
10
21.4°C/12.3°C
No rain
11
22.2°C/13.2°C
No rain
12
19.7°C/10.4°C
No rain
13
21.9°C/13.6°C
No rain
14
23.3°C/14.6°C
No rain
15
22.1°C/12.2°C
No rain
16
23.9°C/12.3°C
No rain
17
23.9°C/13.8°C
No rain
18
24.9°C/15.7°C
No rain
19
19.5°C/12.4°C
No rain
20
15.8°C/7.7°C
No rain
21
21.8°C/8.1°C
No rain
22
22.4°C/14°C
🌧️ 2.3 mm
23
22.2°C/15.6°C
🌧️ 2.3 mm
24
21.6°C/13.9°C
No rain
25
20.1°C/15.2°C
🌧️ 7.1 mm
26
21.1°C/14.4°C
No rain
27
19.5°C/10.2°C
No rain
28
22.1°C/16.1°C
No rain
29
22.1°C/13.4°C
No rain
30
17°C/11.2°C
No rain
September 2024☔ 6 days · 55.6 mm
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1
25.3°C/15.5°C
🌧️ 4.4 mm
2
17.3°C/11.9°C
No rain
3
21.8°C/10.3°C
No rain
4
23.6°C/14.2°C
No rain
5
25.8°C/14.4°C
No rain
6
23.6°C/15.4°C
No rain
7
23.4°C/13.3°C
🌧️ 17.7 mm
8
13.4°C/9.2°C
🌧️ 1.4 mm
9
20.3°C/11.2°C
No rain
10
19.7°C/8.4°C
No rain
11
23.2°C/12.3°C
No rain
12
24.1°C/13.7°C
No rain
13
26.1°C/13.6°C
No rain
14
25.9°C/15.5°C
No rain
15
27.3°C/15.2°C
No rain
16
27.2°C/16.7°C
No rain
17
27.3°C/17.3°C
No rain
18
26.5°C/15.8°C
No rain
19
26.6°C/15.2°C
No rain
20
24.8°C/15.4°C
No rain
21
22.7°C/15.1°C
No rain
22
21.4°C/13°C
No rain
23
17.3°C/14.9°C
🌧️ 3.6 mm
24
20.9°C/12.9°C
No rain
25
16.9°C/12.6°C
🌧️ 6.9 mm
26
21.6°C/14°C
🌧️ 20.9 mm
27
19.7°C/12.6°C
No rain
28
21.2°C/11.6°C
No rain
29
21°C/11.7°C
No rain
30
21.3°C/13°C
No rain
September 2023☔ 6 days · 69.3 mm
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1
22.9°C/11.5°C
No rain
2
24.9°C/14.6°C
No rain
3
27.5°C/18.1°C
No rain
4
28.5°C/19.3°C
No rain
5
30.4°C/20.4°C
No rain
6
31.2°C/21.6°C
No rain
7
28.4°C/22.3°C
🌧️ 1 mm
8
25.8°C/19.9°C
🌧️ 14.3 mm
9
22°C/15.7°C
No rain
10
19.4°C/14.7°C
🌧️ 23.2 mm
11
22.6°C/13°C
No rain
12
22.3°C/14.3°C
No rain
13
22.7°C/16.2°C
🌧️ 14.5 mm
14
17°C/13°C
No rain
15
20.3°C/9.8°C
No rain
16
23.2°C/13.1°C
No rain
17
22.4°C/12.4°C
No rain
18
19.9°C/14.8°C
🌧️ 1 mm
19
16.8°C/14.8°C
🌧️ 15 mm
20
19.4°C/11.4°C
No rain
21
20.6°C/10°C
No rain
22
21.4°C/12°C
No rain
23
21.3°C/12°C
No rain
24
22°C/12.9°C
No rain
25
19.4°C/12.2°C
No rain
26
18.2°C/8.8°C
No rain
27
19.4°C/7.7°C
No rain
28
20.8°C/9.1°C
No rain
29
20.1°C/10.5°C
No rain
30
21.7°C/10.3°C
No rain
Historical calendars use Open-Meteo reanalysis data. A rainy day is counted when daily precipitation is at least 1 mm. Conditions at a specific hotel, beach or station can differ.
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Current Montreal weather and 7-day forecast
When departure is close, the latest forecast matters more than long-term averages.
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Forecast data: MET Norway · CC BY 4.0 · cached by Travel Weather Fairy
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Montreal weather in other months
Switch months to compare the seasonal pattern.