Hamilton weather in August 2026

Expect daytime maximum temperatures of 79°F in Hamilton, Ontario in August based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 3.6 inches of rainfall in the month.

  • 79°F maximum daytime temperature in August in Hamilton79
    79°F max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in August in Hamilton9
    9 days with some rainfall
  • 59°F minimum night-time temperature in August in Hamilton59
    59°F min night temperature
  • 14 hours of daylight per day in August in Hamilton14
    14 hours of daylight per day
  • Low heat & humidity in August in HamiltonL
    Low heat & humidity
  • 3.6 inches monthly rainfall in August in Hamilton3.6
    3.6 inches of monthly rainfall
  • UV (maximum) index 7 (High) in August in Hamilton7
    7 (High) UV index
  • 70°F sea temperature in August in Hamilton70
    70°F sea temperature

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The August weather guide for Ontario (Hamilton) 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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More about Ontario

How hot is it in Hamilton in August?

Daytime temperatures usually reach 77°F in Hamilton in August with low heat and humidity, falling to 59°F at night.

How sunny is it in Hamilton in August?

There are normally 8 hours of bright sunshine each day in Hamilton in August - that's 56% of daylight hours.

How warm is the sea around Hamilton in August?

The average sea temperature around Hamilton in August is 70°F.

Does it rain in Hamilton in August?

There are usually 10 days with some rain in Hamilton in August and the average monthly rainfall is 3.3 inches.

Hamilton August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st August 2026 05:10 19:41
Sunday, 16th August 2026 05:26 19:20
Monday, 31st August 2026 05:43 18:56

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