Ottawa - Recent August Temperatures and Rainfall





The numbers here describe what the August weather in Ottawa, Ontario Canada was like for every year since 2010. A series of tables gives August data by year for temperature and precipitation.

They begin with average maximum and minimum temperatures in degrees Fahrenheit and Celsius. That's followed by how many really hot days occurred each August. Then there's information on how much rain actually landed this month during recent years, as well as how often Ottawa had wet weather.

The climate data come from weather measurements made near downtown Ottawa.

Temperature Weather iconTemperature

August temperature averages by year in Ottawa
High °F Low °F Year High °C Low °C
76 59 2020 25 15
79 57 2019 26 14
80 62 2018 27 17
76 58 2017 24 14
83 62 2016 28 16
78 59 2015 26 15
76 57 2014 24 14
78 59 2013 25 15
81 61 2012 27 16
79 60 2011 26 15
79 58 2010 26 15
Number of days in August when the temperature in Ottawa rose to at least 21 or 32 degrees Celsius
Year 21 °C
70 °F
32 °C
90 °F
2020 24 0
2019 30 0
2018 29 0
2017 28 0
2016 31 4
2015 31 0
2014 25 0
2013 30 0
2012 31 2
2011 30 0
2010 28 1

Rainy Weather iconRain

This table gives the total precipitation that fell on Ottawa during August in each year from 2010. The number of days with precipitation counts the days when rainfall amounted to 0.254 millimeters (0.01 inches) or more.

Total rainfall for August in Ottawa
Days Year Inches Milli­metres
18 2020 7.5 190
12 2019 2.6 67
11 2018 2.7 68
10 2017 3.2 82
9 2016 4.8 122
4 2015 3.0 76
6 2014 4.1 104
6 2013 3.0 75
8 2012 3.7 95
6 2011 3.0 77
8 2010 7.4 187
Reference

Environment and Climate Change Canada. Historical Climate Data. Historical Data

Jay Lawrimore. 2016. Global Summary of the Month, Version 1.0. NOAA National Centers for Environmental Information. 

Ottawa - Recent Years
Ottawa - Extremes
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