Weather in Ottawa in August 2018

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 2018.

Key weather averages for Ottawa in August

  • 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

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

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

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More about Ottawa

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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.

The weather in Ottawa in August is represented by Ottawa.

Ottawa sunrise & sunset times for August 2018

Browse the sunrise & sunset times for Ottawa in August 2018. Select a month to view Ottawa sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st August 2018 05:47 20:31
Thursday, 2nd August 2018 05:48 20:29
Friday, 3rd August 2018 05:49 20:28
Saturday, 4th August 2018 05:50 20:27
Sunday, 5th August 2018 05:52 20:25
Monday, 6th August 2018 05:53 20:24
Tuesday, 7th August 2018 05:54 20:22
Wednesday, 8th August 2018 05:55 20:21
Thursday, 9th August 2018 05:56 20:19
Friday, 10th August 2018 05:58 20:18
Saturday, 11th August 2018 05:59 20:16
Sunday, 12th August 2018 06:00 20:15
Monday, 13th August 2018 06:01 20:13
Tuesday, 14th August 2018 06:02 20:12
Wednesday, 15th August 2018 06:04 20:10
Thursday, 16th August 2018 06:05 20:08
Friday, 17th August 2018 06:06 20:07
Saturday, 18th August 2018 06:07 20:05
Sunday, 19th August 2018 06:08 20:03
Monday, 20th August 2018 06:10 20:02
Tuesday, 21st August 2018 06:11 20:00
Wednesday, 22nd August 2018 06:12 19:58
Thursday, 23rd August 2018 06:13 19:57
Friday, 24th August 2018 06:14 19:55
Saturday, 25th August 2018 06:16 19:53
Sunday, 26th August 2018 06:17 19:51
Monday, 27th August 2018 06:18 19:49
Tuesday, 28th August 2018 06:19 19:48
Wednesday, 29th August 2018 06:21 19:46
Thursday, 30th August 2018 06:22 19:44
Friday, 31st August 2018 06:23 19:42
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Ottawa weather by month

Check Ottawa weather for a particular month by selecting from the list below. Monthly weather guides include figures for temperature, rainfall, sunshine hours and sea temperature plus daily sunrise & sunset times.

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