AI-generatedMontreal at a glance
- Best time
- May – Sep
- Warmest month
- Jul · 25°
- Sunshine a year
- 2,040 h
- Rain a year
- 1,096 mm
- Climate
- Continental
- Time zone
- UTC−5 / UTC−4
- Elevation
- 216 m
Climate in Montreal
Montreal has warm to hot summers and cold winters with occasional snow. July is the warmest month with average highs of 25 °C, while January is the coolest at −6 °C. With around 2,040 hours of sunshine a year, Montreal is moderately sunny; July is the sunniest month with 8.0 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Fair
Best time to visit: May – September
A typical day in October
- Morning, 08:00: about 7°
- Midday, 13:00: about 12°
- Afternoon, 16:00: about 12°
- Evening, 20:00: about 9°
- Night, 23:00: about 7°
07:0918:11
Cold evenings: bring a warm jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 06:51–07:49 · evening 17:31–18:29
- Blue hour
- Morning 06:39–06:51 · evening 18:29–18:41
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
What is the weather like in Montreal in October?
In October, Montreal is cool: daytime highs average 12 °C, and nights cool down to about 5 °C. Expect around 5 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 108 mm in total. All in all, October is a so-so month for a holiday in Montreal.
More details for October
- Daylight
- 11 h 2 min07:09 – 18:11
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 17 km/haverage daily peakAll months
- Cloud cover
- 62 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 1 day1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/Toronto
How the score comes together
- Temperatureweight 50 %42 %
- Sunshineweight 20 %25 %
- Few rainy daysweight 30 %49 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- A jumper for the evenings
- Rain jacket or umbrella
Sunshine hours in Montreal
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 4.5 of 11.0 hours of daylight in Montreal, 41 % of the day.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in Montreal
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 3 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 9).
Minutes until sunburn in October
- Very fair skin
- about 45 min
- Fair skin
- about 55 min
- Light brown skin
- about 80 min
- Olive skin
- about 100 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in Montreal: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Montreal has about 11 rainy days with 108 mm of rain in total.
Wind and clouds in Montreal
How breezy and how cloudy Montreal is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Montreal typically peaks at 17 km/h during the day: Beaufort 3, light breeze.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 62 % of the sky over Montreal: variable cloud, with about 4.5 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in Montreal
How often the day gets hot in Montreal (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Montreal has about 0 hot days, with an average daytime high of 12 °C: pleasant. Heat plays no part this month.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Snow in Montreal
When Montreal is likely to be white: the chance of seeing snow during a week's stay, the days with fresh snow and how much falls. Tap a month to select it.
Snow calendar
- hardly any
- possible
- likely
- very likely
In October, Montreal has about 1 days with at least 1 cm of fresh snow, 3 cm in total. The chance of seeing snow during a week's stay is 11 out of 100: hardly any.
Snow days bring at least 1 cm of fresh snow. Fresh snow comes from ERA5 snowfall (1996–2025) at the height of the place, not on the slopes above it; the snow chance also weighs whether the snow settles. An estimate from climate averages, not a snow report.
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Montreal
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Frost below 0°
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
ColdOctober: nights around 5°. The room should be heated.
The coolest nights are in January (−15°), the warmest in July (16°). Nights are pleasant for sleeping (15 to 20 °C) from July to August. Nights fall below 8 °C on average from October to May, so the room should be heated.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|
| JanuaryJan | 19 | −6° | −15° | 3.6 h | 10 | 73 |
| FebruaryFeb | 24 | −4° | −13° | 4.6 h | 9 | 66 |
| MarchMar | 24 | 2° | −8° | 5.5 h | 11 | 76 |
| AprilApr | 34 | 10° | 0° | 6.4 h | 11 | 105 |
| MayMay | 76 | 18° | 7° | 7.2 h | 11 | 94 |
| JuneJun | 78 | 22° | 13° | 7.6 h | 12 | 108 |
| JulyJul | 78 | 25° | 16° | 8.0 h | 13 | 97 |
| AugustAug | 78 | 24° | 16° | 7.2 h | 12 | 101 |
| SeptemberSep | 79 | 20° | 12° | 6.1 h | 10 | 90 |
| OctoberOct | 41 | 12° | 5° | 4.5 h | 11 | 108 |
| NovemberNov | 16 | 5° | −2° | 3.3 h | 11 | 85 |
| DecemberDec | 12 | −2° | −9° | 2.9 h | 12 | 93 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
45.51° N, 73.59° W · 216 m · America/Toronto
Best time to visit Montreal
The best time to visit Montreal is from May to September. For sightseeing, day trips and hiking, conditions are most comfortable in May and from August to September. Rain is most frequent from June to July and in December; the wettest month is June with 108 mm.
Montreal through the seasons
How the weather changes over the seasons, with averages for each.
Montreal in spring
Mar – May
Fair
- 2–18 °C by day
- 6 h of sun a day
- 34 rainy days in all
Montreal in summer
Jun – Aug
Good
- 22–25 °C by day
- 8 h of sun a day
- 36 rainy days in all
Montreal in autumn
Sep – Nov
Fair
- 5–20 °C by day
- 5 h of sun a day
- 32 rainy days in all
Montreal in winter
Dec – Feb
Poor
- -6–-2 °C by day
- 4 h of sun a day
- 31 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Montreal for you.
Your best months: June – August
Based on the climate averages; tap a month to see its details.
Compare two months in Montreal
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
September has the better holiday weather in Montreal: score 79 against 41. In September, days are 8 °C warmer than in October. September has one rainy day fewer. The sun shines 2 hours longer a day in September.
| Month | October | September |
|---|---|---|
| Weather score | 41 | 79better |
| Day high | 12° | 20° |
| Night low | 5° | 12° |
| Sunshine | 4.5 h | 6.1 hbetter |
| Rainy days | 11 | 10better |
| Rainfall | 108 mm | 90 mmbetter |
| Muggy days | 0better | 2 |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
May, Aug – Sep
15–28 °C and not too much rain
Rainy months
Jun – Jul, Dec
12 or more rainy days
Snow
Nov – Apr
Snow on 2 or more days
Montreal month by month
The typical weather for every month at a glance.
19January-6° · 4 h
In January, Montreal is freezing cold: daytime highs average −6 °C, and nights often drop below freezing (−15 °C). The sun is scarce, with only about 4 hours a day. Precipitation, often as snow, falls on about 10 days, totalling 73 mm. Snow falls on about 8 days. All in all, January is not an ideal month for a holiday in Montreal.
Montreal in January24February-4° · 5 h
In February, Montreal is freezing cold: daytime highs average −4 °C, and nights often drop below freezing (−13 °C). Expect around 5 hours of sunshine a day. Precipitation, often as snow, falls on about 9 days, totalling 66 mm. Snow falls on about 7 days. All in all, February is not an ideal month for a holiday in Montreal.
Montreal in February24March2° · 6 h
In March, Montreal is freezing cold: daytime highs average 2 °C, and nights often drop below freezing (−8 °C). Expect around 6 hours of sunshine a day. Precipitation, often as snow, falls on about 11 days, totalling 76 mm. Snow falls on about 6 days. All in all, March is not an ideal month for a holiday in Montreal.
Montreal in March34April10° · 6 h
In April, Montreal is cold: daytime highs average 10 °C, and nights often drop below freezing (0 °C). Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 105 mm in total. Snow falls on about 3 days. All in all, April is not an ideal month for a holiday in Montreal.
Montreal in April76May18° · 7 h
In May, Montreal is mild: daytime highs average 18 °C, and nights cool down to about 7 °C. The sun shines for around 7 hours a day. Rain is frequent, with about 11 rainy days and 94 mm in total. All in all, May is a good month for a holiday in Montreal.
Montreal in May78June22° · 8 h
In June, Montreal is warm: daytime highs average 22 °C, and nights cool down to about 13 °C. The sun shines for around 8 hours a day. Rain is frequent, with about 12 rainy days and 108 mm in total. All in all, June is a good month for a holiday in Montreal.
Montreal in June78July25° · 8 h
In July, Montreal is warm: daytime highs average 25 °C, and nights cool down to about 16 °C. The sun shines for around 8 hours a day. Rain is frequent, with about 13 rainy days and 97 mm in total. All in all, July is a good month for a holiday in Montreal.
Montreal in July78August24° · 7 h
In August, Montreal is warm: daytime highs average 24 °C, and nights cool down to about 16 °C. The sun shines for around 7 hours a day. Rain is frequent, with about 12 rainy days and 101 mm in total. All in all, August is a good month for a holiday in Montreal.
Montreal in August79September20° · 6 h
In September, Montreal is mild: daytime highs average 20 °C, and nights cool down to about 12 °C. Expect around 6 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 90 mm in total. All in all, September is a good month for a holiday in Montreal.
Montreal in September41October12° · 5 h
In October, Montreal is cool: daytime highs average 12 °C, and nights cool down to about 5 °C. Expect around 5 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 108 mm in total. All in all, October is a so-so month for a holiday in Montreal.
Montreal in October16November5° · 3 h
In November, Montreal is cold: daytime highs average 5 °C, and nights often drop below freezing (−2 °C). The sun is scarce, with only about 3 hours a day. Rain is frequent, with about 11 rainy days and 85 mm in total. Snow falls on about 3 days. All in all, November is not an ideal month for a holiday in Montreal.
Montreal in November12December-2° · 3 h
In December, Montreal is freezing cold: daytime highs average −2 °C, and nights often drop below freezing (−9 °C). The sun is scarce, with only about 3 hours a day. Precipitation, often as snow, falls on about 12 days, totalling 93 mm. Snow falls on about 8 days. All in all, December is not an ideal month for a holiday in Montreal.
Montreal in DecemberMontreal compared
Put Montreal side by side with another destination.
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Montreal vs. Mont-Tremblant
In October Montreal has the better holiday weather (score 41 vs. 29). During the day Mont-Tremblant is 1 °C cooler than Montreal. Mont-Tremblant gets one hour less sunshine a day.
| in October | Montreal | Mont-Tremblant |
|---|---|---|
| Holiday score | 41 | 29 |
| Daytime high | 12° | 11° |
| Sunshine | 5 h | 4 h |
| Rainy days | 11 | 13 |
| Best time | May – Sep | May – Sep |
Through the year
Canada in October: the best places
In October, Montreal ranks 11 among the 31 nearest destinations in this country.
- Hamilton15°53
- 2Toronto14°52
- 3Niagara-on-the-Lake15°51
- 4Niagara Falls15°51
- 5London15°50
- 6Halifax14°14°49
- 7Collingwood (Blue Mountains)13°47
- 8Ottawa13°44
- 11MontrealThis page12°41
Planning a trip to Montreal
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Montreal in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Montreal has its best school-holiday weather during the summer holidays (score 78) and its weakest during the Christmas holidays (score 16).
- 31
Easter holidays
Mar – Apr
Poor
- 7 °C by day
- 6.1 h of sun a day
- 11 rainy days a month
Keep in mind: Snow
- 76
May half-term
May – Jun
Good
- 18 °C by day
- 7.3 h of sun a day
- 12 rainy days a month
Good for: Sightseeing & walks
- 78
Summer holidays
Jul – Aug
GoodBest holidays
- 24 °C by day
- 7.5 h of sun a day
- 12 rainy days a month
Keep in mind: Frequent rain
- 41
October half-term
Oct
Fair
- 12 °C by day
- 4.5 h of sun a day
- 11 rainy days a month
- 16
Christmas holidays
Dec – Jan
Poor
- −4 °C by day
- 3.3 h of sun a day
- 11 rainy days a month
Keep in mind: Frequent rain, Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 6 h 45 min
- Distance
- 5,200 km
- Time zone
- UTC−4
- Jet lag
- About 3 days (5 h west)
Rule of thumb for flying west: for a few days before, stay up a little later, and get afternoon and evening light at your destination.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Frequently asked questions about Montreal
When is the best time to visit Montreal?
The best time to visit Montreal is from May to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
What is the warmest month in Montreal?
July is the warmest month, with average highs of 25 °C and nights around 16 °C. January is the coolest month at −6 °C.
When does it rain most in Montreal?
Rain is most frequent from June to July and in December; the wettest month is June with 108 mm. The driest month is February with 66 mm.
How many hours of sunshine does Montreal get?
Montreal gets around 2,040 hours of sunshine a year. The sunniest month is July with 8.0 hours a day; in December there are 2.9 hours a day.
What time zone is Montreal in?
Montreal uses the time zone America/Toronto: UTC−5 in January and UTC−4 in July.
How long is the flight from London to Montreal?
A nonstop flight from London to Montreal takes about 6 h 45 min, for a straight-line distance of about 5,200 km.
Which school holidays are best for Montreal?
Montreal has its best school-holiday weather during the summer holidays (score 78) and its weakest during the Christmas holidays (score 16). Holiday ratings (0–100): Easter holidays 31, May half-term 76, Summer holidays 78, October half-term 41, Christmas holidays 16.
Near Montreal
Other destinations close by.
Places with a climate like Montreal
Destinations whose weather through the year is closest to Montreal's – good alternatives.