Montreal weather in August 2026

Expect daytime maximum temperatures of 77°F in Montreal, Quebec in August based on long-term weather averages. There are 7 hours of sunshine per day on average with 13 days with some rainfall and typically 4.0 inches of rainfall in the month.

  • 77°F maximum daytime temperature in August in Montreal77
    77°F max day temperature
  • 7 hours of sunshine per day
  • 13 days with some rainfall in August in Montreal13
    13 days with some rainfall
  • 59°F minimum night-time temperature in August in Montreal59
    59°F min night temperature
  • 14 hours of daylight per day in August in Montreal14
    14 hours of daylight per day
  • Low heat & humidity in August in MontrealL
    Low heat & humidity
  • 4.0 inches monthly rainfall in August in Montreal4.0
    4.0 inches of monthly rainfall
  • UV (maximum) index 7 (High) in August in Montreal7
    7 (High) UV index

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The August weather guide for Quebec (Montreal) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How hot is it in Montreal in August?

Daytime temperatures usually reach 75°F in Montreal in August, falling to 55°F at night.

How sunny is it in Montreal in August?

There are normally 7 hours of bright sunshine each day in Montreal in August - that's 50% of daylight hours.

Does it rain in Montreal in August?

There are usually 14 days with some rain in Montreal in August and the average monthly rainfall is 4.4 inches.

Montreal August sunrise & sunset times

Browse the sunrise and sunset times for Montreal in August 2026. Select a month to view Montreal sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st August 2026 04:38 19:22
Sunday, 16th August 2026 04:56 19:00
Monday, 31st August 2026 05:14 18:34

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