Month guide · Montreal · Canada
Montreal in September
What September is really like in Montreal: weather, crowds, prices, events and what to pack.
Updated By the AMZBooking editorial team
Photo: Thomas Ledl, CC BY-SA 4.0
Quick answer
September is one of the best months to visit Montreal. Expect average highs of 21°C (70°F), lows of 10°C (50°F), about 11 rainy days and roughly 12.5 hours of daylight. Warm days, cool nights and thinner crowds; the Botanical Garden's lantern festival begins.
Key facts
- Average high / low
- 21°C (70°F) / 10°C (50°F)
- Rainy days
- About 11
- Daylight
- About 12.5 hours
- Crowds
- Moderate
- Hotel prices
- High
Weather in September
September is the 4th-warmest month in Montreal: days average 21°C (70°F) against a yearly average high of 12°C (54°F), and nights fall to about 10°C (50°F). Rain falls on roughly 11 of its 30 days. Compared with August (25°C (77°F)), September is cooler; by October highs drop to around 13°C (55°F).
- Sunrise (15 September)
- About 06:32
- Sunset (15 September)
- About 19:06
- Daylight
- About 12.5 hours
Autumn (September–November). Crisp, sunny September and October days with red and gold maples on Mount Royal, then a grey, cold November.
Crowds and prices
On a 1–5 scale, September rates 3 for crowds (the peak is July at 5) and 4 for hotel prices (highest in June). Book accommodation early: September is one of the pricier months.
Events in September
- Gardens of Light at the Botanical Garden (usually September–October)
- POP Montreal — independent music festival (usually late September)
Dates move from year to year. Check the organiser’s site before booking travel around an event.
What to do in September
With frequent rain, plan around indoor sights and keep outdoor time flexible.
Museum · Old Montreal
Pointe-à-Callière
Start with the multimedia show on the city's history, then go below ground to the excavations.
- Time needed
- 2 hours
- Cost
- Mid-priced
- History
- Rainy day
- Kids
- Off the beaten path
Zoo · Olympic Park
Montreal Biodôme
Inside the velodrome built for the 1976 Olympics, the Biodôme recreates four ecosystems of the Americas that visitors walk through: a tropical rainforest, a Laurentian maple forest, the Gulf of St.
- Time needed
- 1.5–2 hours
- Cost
- Mid-priced
- Kids
- Rainy day
- Nature
Experience · Downtown
Underground City (RÉSO)
Follow the RÉSO signs between metro stations on a cold day; the food courts of the big shopping centres make an inexpensive lunch.
- Time needed
- 1 hour
- Cost
- Free
- Free
- Rainy day
- Shopping
- Food
Museum · Old Port
Montreal Science Centre
On King Edward Pier in the Old Port, the Montreal Science Centre has hands-on exhibitions on technology, the human body and engineering aimed at children and teenagers, plus an IMAX cinema.
- Time needed
- 2–3 hours
- Cost
- Mid-priced
- Kids
- Rainy day
What to pack
For highs near 21°C, lows near 10°C and 11 wet days: light layers for the day and a light jacket for the evening; a packable rain jacket for showers; comfortable walking shoes.
Is September a good time to visit Montreal?
One of the best months to visit Montreal, with 2 notable events on the calendar. The other best months are June–August and October. Compare every month.
Montreal in other months
Questions travellers ask
+Is September a good time to visit Montreal?
It is one of the best months to visit Montreal. Warm days, cool nights and thinner crowds; the Botanical Garden's lantern festival begins.
+How warm is Montreal in September?
Average highs are around 21°C (70°F) and lows around 10°C (50°F).
+Does it rain a lot in Montreal in September?
Expect rain on about 11 days of the month.