Average Temperatures for Ontario in August





You can jump to a separate table for each section of the province: Eastern, Central, Southwestern, Northeastern and Northwestern Ontario.

Average temperatures for August at cities, towns and parks throughout Ontario are given below.

The tables list the normals for maximum and minimum monthly temperatures, in degrees Celsius and Fahrenheit, based on weather data collected from 1981 to 2010.

Eastern Ontario

Average August temperatures
High °F Low °F Place High °C Low °C
78 61 Belleville 26 16
78 60 Cornwall 26 16
75 59 Kingston 24 15
78 58 Ottawa 25 14
76 51 Pembroke 25 11

Central Ontario

Average daily temperatures in August
High °F Low °F Place High °C Low °C
77 58 Barrie 25 14
78 58 Brantford 26 14
76 55 French River, Chaudiere Dam 25 13
79 60 Hamilton 26 16
75 56 Huntsville 24 13
77 56 Midland 25 13
79 62 Niagara Falls 26 17
76 60 Oshawa 24 16
77 58 Peterborough 25 14
78 60 St Catharines 26 16
78 63 Toronto 26 17

Southwestern Ontario

August temperatures: daily averages
High °F Low °F Place High °C Low °C
80 62 Chatham-Kent 26 17
76 55 Guelph 24 13
78 57 London 25 14
75 59 Owen Sound 24 15
78 63 Point Pelee National Park 26 17
77 59 Sarnia 25 15
77 55 Waterloo 25 13
80 63 Windsor 27 17

Northeastern Ontario

Average August temperatures
High °F Low °F Place High °C Low °C
71 50 Chapleau 22 10
75 57 Gore Bay 24 14
72 49 Kapuskasing 22 10
70 47 Moosonee 21 9
73 55 North Bay 23 13
74 53 Sault Ste Marie 23 12
73 56 South Baymouth 23 13
74 54 Sudbury 23 12
73 49 Timmins 23 9
70 50 Wawa 21 10

Northwestern Ontario

Average August temperatures
High °F Low °F Place High °C Low °C
75 55 Atikokan 24 13
68 51 Big Trout Lake 20 11
74 54 Dryden 23 12
75 52 Fort Frances 24 11
74 57 Kenora 23 14
73 52 Red Lake 23 11
74 51 Thunder Bay 23 10
Reference

Environment Canada. Meteorological Service of Canada. Canadian Climate Normals. 1981-2010 Climate Normals & Averages.

Ontario Temperatures
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