October Temperatures in Ontario

Average temperatures for October 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 October temperatures
High °F	Low °F	Place	High °C	Low °C
57	42	Belleville	14	5
56	41	Cornwall	14	5
56	40	Kingston	13	5
55	39	Ottawa	13	4
54	34	Pembroke	12	1

Central Ontario

Average daily temperatures in October
High °F	Low °F	Place	High °C	Low °C
56	39	Barrie	13	4
58	39	Brantford	15	4
53	36	French River, Chaudiere Dam	12	2
58	42	Hamilton	15	5
54	37	Huntsville	12	3
55	38	Midland	13	3
59	44	Niagara Falls	15	7
56	42	Oshawa	13	6
56	39	Peterborough	13	4
59	42	St Catharines	15	6
57	45	Toronto	14	7

Southwestern Ontario

October temperatures: daily averages
High °F	Low °F	Place	High °C	Low °C
60	44	Chatham-Kent	16	7
56	37	Guelph	13	3
57	40	London	14	4
56	42	Owen Sound	13	6
59	46	Point Pelee National Park	15	8
59	42	Sarnia	15	5
56	37	Waterloo	14	3
61	44	Windsor	16	7

Northeastern Ontario

Average October temperatures
High °F	Low °F	Place	High °C	Low °C
48	31	Chapleau	9	0
53	39	Gore Bay	11	4
47	31	Kapuskasing	8	0
46	31	Moosonee	8	0
51	36	North Bay	10	2
53	37	Sault Ste Marie	12	3
52	39	South Baymouth	11	4
51	35	Sudbury	10	2
48	31	Timmins	9	0
49	33	Wawa	10	0

Northwestern Ontario

Average October temperatures
High °F	Low °F	Place	High °C	Low °C
49	33	Atikokan	9	1
40	29	Big Trout Lake	4	-2
47	32	Dryden	8	0
50	32	Fort Frances	10	0
48	35	Kenora	9	1
46	31	Red Lake	8	0
50	30	Thunder Bay	10	-1

Average Temperatures for Ontario in October

Eastern Ontario

Central Ontario

Southwestern Ontario

Northeastern Ontario

Northwestern Ontario

Reference

More Ontario Weather Information