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