Average Temperatures for Ontario in September





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

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

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 September temperatures
High °F Low °F Place High °C Low °C
70 53 Belleville 21 12
70 52 Cornwall 21 11
67 51 Kingston 20 11
69 50 Ottawa 20 10
67 43 Pembroke 19 6

Central Ontario

Average daily temperatures in September
High °F Low °F Place High °C Low °C
69 50 Barrie 21 10
71 50 Brantford 22 10
66 46 French River, Chaudiere Dam 19 8
70 52 Hamilton 21 11
66 48 Huntsville 19 9
68 48 Midland 20 9
70 54 Niagara Falls 21 12
68 53 Oshawa 20 12
68 50 Peterborough 20 10
71 53 St Catharines 22 12
70 56 Toronto 21 13

Southwestern Ontario

September temperatures: daily averages
High °F Low °F Place High °C Low °C
73 55 Chatham-Kent 23 13
68 47 Guelph 20 8
70 50 London 21 10
68 52 Owen Sound 20 11
71 56 Point Pelee National Park 22 14
71 52 Sarnia 22 11
69 48 Waterloo 20 9
73 55 Windsor 23 13

Northeastern Ontario

Average September temperatures
High °F Low °F Place High °C Low °C
62 42 Chapleau 17 6
65 49 Gore Bay 18 10
62 42 Kapuskasing 17 5
60 41 Moosonee 16 5
64 47 North Bay 18 8
66 46 Sault Ste Marie 19 8
63 49 South Baymouth 17 10
64 46 Sudbury 18 8
63 41 Timmins 17 5
62 43 Wawa 17 6

Northwestern Ontario

Average September temperatures
High °F Low °F Place High °C Low °C
64 45 Atikokan 18 7
54 40 Big Trout Lake 12 5
62 44 Dryden 17 7
65 44 Fort Frances 18 7
63 47 Kenora 17 8
61 43 Red Lake 16 6
64 42 Thunder Bay 18 6
Reference

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

Ontario Temperatures
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