Average Precipitation for Ontario in September





The tables below give monthly averages for rainfall plus snowfall during September at cities, towns and parks in Ontario. Each place has a total for how many days of wet weather it usually gets this month and for the normal amount of precipitation.

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

The calculation of days only includes the days when precipitation totalled at least 0.2 millimetres (0.008 inches). The month's total precipitation is an average of weather data collected during 1981 to 2010.

Eastern Ontario

Average monthly precipitation in September
Days Place Inches Milli­metres
11 Belleville 3.6 92
12 Cornwall 3.9 98
12 Kingston 3.5 90
13 Ottawa 3.7 93
15 Pembroke 3.3 84

Central Ontario

September averages for total rainfall plus snowfall
Days Place Inches Milli­metres
13 Barrie 3.7 94
11 Brantford 3.4 87
13 French River, Chaudiere Dam 4.2 106
12 Hamilton 3.2 81
13 Huntsville 4.4 111
12 Midland 3.7 95
13 Niagara Falls 3.5 88
12 Oshawa 3.7 94
12 Peterborough 3.3 84
11 St Catharines 3.6 91
11 Toronto 3.3 85

Southwestern Ontario

Average amount of rain and snow in September
Days Place Inches Milli­metres
10 Chatham-Kent 3.5 89
14 Guelph 3.6 90
12 London 4.1 103
14 Owen Sound 4.2 106
12 Point Pelee National Park 3.6 93
11 Sarnia 4.1 105
12 Waterloo 3.5 88
10 Windsor 3.7 94

Northeastern Ontario

Precipitation totals for September
Days Place Inches Milli­metres
17 Chapleau 3.7 95
13 Gore Bay 3.5 88
17 Kapuskasing 4.0 101
18 Moosonee 3.8 95
14 North Bay 4.5 115
14 Sault Ste Marie 4.0 102
13 South Baymouth 3.7 95
13 Sudbury 4.0 101
16 Timmins 3.3 85
15 Wawa 4.8 122

Northwestern Ontario

Total precipitation during September
Days Place Inches Milli­metres
14 Atikokan 3.9 100
17 Big Trout Lake 3.6 90
15 Dryden 3.5 89
13 Fort Frances 3.3 83
13 Kenora 3.4 86
15 Red Lake 3.3 83
14 Thunder Bay 2.9 73
Reference

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

Ontario Precipitation
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