Ottawa weather in August 2020

  • 25°C maximum daytime temperature in August in Ottawa25
    25°C max day temperature
  • 8 hours of sunshine per day
  • 11 days with some rainfall in August in Ottawa11
    11 days with some rainfall
  • 14°C minimum night-time temperature in August in Ottawa14
    14°C min night temperature
  • 14 hours of daylight per day in August in Ottawa14
    14 hours of daylight per day
  • No heat & humidity in August in Ottawa0
    No heat & humidity
  • 86 mm monthly rainfall in August in Ottawa86
    86 mm of monthly rainfall
  • UV (maximum) index 7 (High) in August in Ottawa7
    7 (High) UV index
  • Top deals & discounts
  • Ottawa weather overview
  • Ottawa climate averages by month
  • More destinations
  • Best time to go to Ottawa
  • Ottawa 5-day weather forecast

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The August weather guide for Ottawa, Ontario 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.

  • Browse the best deals on hotel stays & compare prices
  • Check lowest rates by month & also by day of the week
  • Search by date or browse hotels by destination & map

How hot is it in Ottawa in August?

Daytime temperatures usually reach 25°C in Ottawa in August with no heat and humidity, falling to 14°C at night.

How sunny is it in Ottawa in August?

There are normally 8 hours of bright sunshine each day in Ottawa in August - that's 55% of daylight hours.

Does it rain in Ottawa in August?

There are usually 11 days with some rain in Ottawa in August and the average monthly rainfall is 86mm.

Ottawa sunrise & sunset times for August 2020

Browse the sunrise & sunset times for Ottawa in August 2020. Select a month to view Ottawa sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st August 2020 05:48 20:30
Sunday, 16th August 2020 06:05 20:08
Monday, 31st August 2020 06:24 19:41
  • Check out the latest low fares on flights worldwide
  • Explore cheap flights by destination or airline
  • Filter deals by departure airport, month & more

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

Discover more about Canada

Where's hot in Ontario in August?

Below are average maximum temperatures at popular destinations in Ontario in August. Select a destination to see more weather parameters.

More destinations & map >>

Related posts

Popular travel offers

Top ^

*affiliate links: find out how we are funded and why this helps us remain free to use.