Weather in Ottawa in August 2019

  • 25°C maximum daytime temperature in August in Ottawa25
    25°C max day temperature
  • 8 hours of sunshine per day (55% of daylight hours) in August in Ottawa8
    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

Going to Ottawa? Find the best month to visit Ottawa based on the weather.

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Expect 25°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Ottawa in August. Check more long-term weather averages for Ottawa in August before you book your next holiday to Ontario in 2019/2020.

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More about Ottawa

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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.

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

Guide to Ottawa weather in August

The average maximum daytime temperature in Ottawa in August is a warm 25°C (77°F). The average night-time temperature is usually a comfortable 14°C (57°F). There are usually 8 hours of bright sunshine each day, which represents 55% of the 14 hours of daylight.

Expect 86mm (3.4 inches) of rainfall across the whole of August with 11 days with some rain falling. Maximum UV levels will be high (7 UV index) at midday when the skies are clear.

Ottawa sunrise & sunset times for August 2019

Browse the sunrise & sunset times for Ottawa in August 2019. Select a month to view Ottawa sunrise & sunset times for the next twelve months.

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Date Sunrise times Sunset times
Thursday, 1st August 2019 05:47 20:31
Friday, 2nd August 2019 05:48 20:30
Saturday, 3rd August 2019 05:49 20:28
Sunday, 4th August 2019 05:50 20:27
Monday, 5th August 2019 05:51 20:25
Tuesday, 6th August 2019 05:53 20:24
Wednesday, 7th August 2019 05:54 20:23
Thursday, 8th August 2019 05:55 20:21
Friday, 9th August 2019 05:56 20:20
Saturday, 10th August 2019 05:57 20:18
Sunday, 11th August 2019 05:58 20:17
Monday, 12th August 2019 06:00 20:15
Tuesday, 13th August 2019 06:01 20:14
Wednesday, 14th August 2019 06:02 20:12
Thursday, 15th August 2019 06:03 20:10
Friday, 16th August 2019 06:04 20:09
Saturday, 17th August 2019 06:06 20:07
Sunday, 18th August 2019 06:07 20:05
Monday, 19th August 2019 06:08 20:04
Tuesday, 20th August 2019 06:09 20:02
Wednesday, 21st August 2019 06:11 20:00
Thursday, 22nd August 2019 06:12 19:59
Friday, 23rd August 2019 06:13 19:57
Saturday, 24th August 2019 06:14 19:55
Sunday, 25th August 2019 06:15 19:53
Monday, 26th August 2019 06:17 19:52
Tuesday, 27th August 2019 06:18 19:50
Wednesday, 28th August 2019 06:19 19:48
Thursday, 29th August 2019 06:20 19:46
Friday, 30th August 2019 06:22 19:44
Saturday, 31st August 2019 06:23 19:43
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