Ottawa ON Recent August Temperatures, 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

August temperature averages by year in Ottawa
High °F	Low °F	Year	High °C	Low °C
76	57	2023	25	14
80	60	2022	27	16
83	63	2021	28	17
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
2023	28	0
2022	28	1
2021	29	4
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

Rain

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
14	2023	4.8	123
17	2022	6.9	175
6	2021	1.6	41
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

Ottawa - Recent August Temperatures and Rainfall

Temperature

Rain

Reference

More on Weather in Ottawa