Weather in Montreal - 14-day forecast

Detailed weather forecast for Montreal, Canada: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.

Forecast for the next days in Montreal

today🌧️ 18°💧 0.3 mm

Sun🌤️ 18°💧 14.9 mm

Mon☀️ 23°💧 0.3 mm

Tue🌤️ 20°💧 4.8 mm

Wed🌧️ 17°💧 9.7 mm

Thu🌧️ 15°💧 0.6 mm

Fri☁️ 14°💧 1.9 mm

Sat🌤️ 16°💧 5.8 mm

Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Thursday 10 Sept in Montreal, the forecast high is 15°C. Typical daytime temperatures at this time of year range from 20°C to 27°C, so it will be exceptionally cool. It is cooler than 98% of similar days.

Saturday 5 Sept

18°Cexceptionally cool

usually 21°C–27°C

cooler than 95% of similar days

night: warmer than usual rain: typical rainfall wind: typical

Sunday 6 Sept

18°Cexceptionally cool

usually 21°C–27°C

cooler than 95% of similar days

night: warmer than usual rain: exceptionally wet wind: lighter than usual

Monday 7 Sept

23°Cnear normal

usually 20°C–27°C

night: exceptionally warm rain: typical rainfall wind: typical

Tuesday 8 Sept

20°Ccooler than usual

usually 20°C–27°C

cooler than 82% of similar days

night: exceptionally warm rain: more rain than usual wind: exceptionally light

Wednesday 9 Sept

17°Cexceptionally cool

usually 20°C–27°C

cooler than 95% of similar days

night: exceptionally warm rain: exceptionally wet wind: stronger than usual

Thursday 10 Sept

15°Cexceptionally cool

usually 20°C–27°C

cooler than 98% of similar days

night: near normal rain: typical rainfall wind: stronger than usual

Friday 11 Sept

14°Cexceptionally cool

usually 19°C–26°C

cooler than 98% of similar days

night: near normal rain: typical rainfall wind: exceptionally light

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →

cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 24°C by day. The coolest year was 1986 (19°C) and the warmest was 2015 (29°C). The current forecast averages 18°C - lower than in 100% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

14-day forecast - Montreal

Montreal - 14-day weather forecast infographic

Montreal 30 & 45-day weather - long-range outlook

Next 15 days · forecast

19°

around 17° at night · days with rain: 8

Weeks 3-4 · avg for September

22°

around 13° at night · rain chance 0%

Weeks 5-7 · avg for October

15°

around 7° at night · rain chance 0%

The 30 & 45-day outlook for Montreal: the next 15 days are a numerical forecast updated daily - on average 19° by day and 17° at night. Further out we rely on multi-year climate averages: around 22° in September, and about 15° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Montreal

Saturday5 September 2026

🌧️18°light rain

sunrise 06:20 · sunset 19:25 · night 16° · evening 18° · rain 0.29 mm · humidity 89% · wind 5 m/s · clouds 100%

Sunday6 September 2026

🌤️18°scattered clouds

sunrise 06:21 · sunset 19:23 · night 16° · evening 21° · rain 14.88 mm · humidity 55% · wind 4 m/s · clouds 27%

Monday7 September 2026

☀️23°clear sky

sunrise 06:23 · sunset 19:21 · night 19° · evening 23° · rain 0.32 mm · humidity 46% · wind 5 m/s · clouds 5%

Tuesday8 September 2026

🌤️20°scattered clouds

sunrise 06:24 · sunset 19:19 · night 18° · evening 22° · rain 4.8 mm · humidity 43% · wind 2 m/s · clouds 36%

Wednesday9 September 2026

🌧️17°moderate rain

sunrise 06:25 · sunset 19:18 · night 21° · evening 21° · rain 9.67 mm · humidity 95% · wind 7 m/s · clouds 100%

Thursday10 September 2026

🌧️15°light rain

sunrise 06:26 · sunset 19:16 · night 12° · evening 13° · rain 0.6 mm · humidity 59% · wind 8 m/s · clouds 78%

Friday11 September 2026

☁️14°broken clouds

sunrise 06:28 · sunset 19:14 · night 12° · evening 18° · rain 1.92 mm · humidity 46% · wind 3 m/s · clouds 67%

Saturday12 September 2026

🌤️16°scattered clouds

sunrise 06:29 · sunset 19:12 · night 14° · evening 19° · rain 5.76 mm · humidity 53% · wind 4 m/s · clouds 28%

Sunday13 September 2026

☁️20°overcast clouds

sunrise 06:30 · sunset 19:10 · night 18° · evening 24° · rain 0.12 mm · humidity 47% · wind 4 m/s · clouds 95%

Monday14 September 2026

🌧️23°light rain

sunrise 06:31 · sunset 19:08 · night 23° · evening 29° · rain 0.69 mm · humidity 64% · wind 3 m/s · clouds 92%

Tuesday15 September 2026

🌧️25°moderate rain

sunrise 06:32 · sunset 19:06 · night 23° · evening 30° · rain 15.63 mm · humidity 80% · wind 4 m/s · clouds 93%

Wednesday16 September 2026

🌧️27°light rain

sunrise 06:34 · sunset 19:04 · night 25° · evening 30° · rain 3.9 mm · humidity 73% · wind 3 m/s · clouds 99%

Thursday17 September 2026

🌧️27°light rain

sunrise 06:35 · sunset 19:02 · night 23° · evening 27° · rain 1.23 mm · humidity 62% · wind 5 m/s · clouds 61%

Friday18 September 2026

🌧️16°light rain

sunrise 06:36 · sunset 19:00 · night 9° · evening 13° · rain 0.12 mm · humidity 49% · wind 7 m/s · clouds 95%

Saturday19 September 2026

🌤️10°scattered clouds

sunrise 06:37 · sunset 18:58 · night 8° · evening 13° · humidity 46% · wind 5 m/s · clouds 46%

UV index in Montreal - is it safe to sunbathe?

Today the UV index in Montreal is 3 (low). You can safely stay outside. Sunscreen only matters for very long exposure.

Montreal weather through the year

Warmest, driest months on average: April, May, June, July.

Upcoming public holidays in Canada: Labour Day — 7 September · National Day for Truth and Reconciliation — 30 September · Thanksgiving — 12 October.

Nearby and related places

GatineauOttawaQuebec CityMarkhamMississaugaSurrey

FAQ - Montreal weather

What is the weather like in Montreal today?

Today it is about 18° during the day and 16° at night, light rain.

How far ahead can I check the forecast for Montreal?

This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.