Kingston weather in August 2025

Expect 25°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Kingston in August. Check more long-term weather averages for Kingston in August before you book your next holiday to Ontario in 2025/2026.

  • 25°C maximum daytime temperature in August in Kingston25
    25°C max day temperature
  • 8 hours of sunshine per day
  • 11 days with some rainfall in August in Kingston11
    11 days with some rainfall
  • 15°C minimum night-time temperature in August in Kingston15
    15°C min night temperature
  • 14 hours of daylight per day in August in Kingston14
    14 hours of daylight per day
  • No heat & humidity in August in Kingston0
    No heat & humidity
  • 81 mm monthly rainfall in August in Kingston81
    81 mm of monthly rainfall
  • UV (maximum) index 7 (High) in August in Kingston7
    7 (High) UV index
  • 21°C sea temperature in August in Kingston21
    21°C sea temperature

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The August weather guide for Ontario (Kingston) 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 / mm)  |  Imperial (°F / inches)

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More about Ontario

How hot is it in Kingston in August?

Daytime temperatures usually reach 25°C in Kingston in August with no heat and humidity, falling to 15°C at night.

How sunny is it in Kingston in August?

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

How warm is the sea around Kingston in August?

The average sea temperature around Kingston in August is 21°C.

Does it rain in Kingston in August?

There are usually 11 days with some rain in Kingston in August and the average monthly rainfall is 81mm.

Kingston August sunrise & sunset times

Browse the sunrise and sunset times for Kingston in August 2025. Select a month to view Kingston sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:54 19:30
Saturday, 16th August 2025 05:11 19:09
Sunday, 31st August 2025 05:28 18:43

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