Toronto

Ontario Weather in October

Average temperatures, rainfall, sunshine and the best places to visit in Ontario, Canada in October.

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Toronto Ottawa Niagara Falls Mississauga

Are you planning a trip a to Ontario, Canada in October and wondering what kind of weather to expect? This page has all the details you need.

What to Expect in Ontario in October

Ontario, Canada is a region in Canada. October in Ontario generally has temperatures that range from cold to mild, with precipitation levels ranging from moderate to high.

Temperatures

During the day the temperature is cold in Red Lake at 8°C (46°F) and mild in Chatham at 16°C (61°F). As night falls, temperatures generally drop to 8°C (46°F) in Chatham and 1°C (34°F) in Red Lake.

For specific regional insights in Ontario, Canada, refer to the map provided below.

Precipitation

In October, precipitation varies across different areas. From moderate rainfall in Fort Frances with an average of 58 mm (2.3 in) to high rainfall in Rockport with 133 mm (5.2 in).

Average sunshine

Sunshine levels are moderate in most locations. Toronto typically sees 160 hours of sunlight, creating comfortable conditions that aren't too bright or too dim. Looking for something sunnier? Our weather planner helps you discover destinations with more reliable sunshine.

Explore Ontario by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Best Places to Visit in Ontario in October

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Ontario.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Ontario

What is the weather like in October for some of the most popular destinations in Ontario, Canada?

Temperature range in Ontario (October)

Precipitation variation in Ontario (October)

Toronto

In October Toronto generally has moderate temperatures with maximum daytime temperatures around 16°C (61°F), minimum nighttime temperatures around 8°C (46°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« September
October
November »
September
October
November
Max temperature
22°C (72°F)
16°C (61°F)
9°C (48°F)
Min temperature
15°C (59°F)
8°C (46°F)
2°C (36°F)
Monthly sun hours
195 hours
160 hours
88 hours
Monthly rainfall
83 mm (3.3 in)
91 mm (3.6 in)
87 mm (3.4 in)
Monthly rainy days
10 days
11 days
12 days
Weather conditions
perfect
tolerable
poor
Climate in Toronto →

Ottawa

In October Ottawa generally has moderate temperatures with maximum daytime temperatures around 14°C (57°F), minimum nighttime temperatures around 4°C (39°F) and high monthly rainfall. So on average the conditions are unpleasant that month.

« September
October
November »
September
October
November
Max temperature
22°C (72°F)
14°C (57°F)
7°C (45°F)
Min temperature
10°C (50°F)
4°C (39°F)
-2°C (28°F)
Monthly sun hours
178 hours
138 hours
85 hours
Monthly rainfall
99 mm (3.9 in)
102 mm (4 in)
87 mm (3.4 in)
Monthly rainy days
12 days
12 days
14 days
Weather conditions
perfect
unpleasant
poor
Climate in Ottawa →

Niagara Falls

In October Niagara Falls generally has moderate temperatures with maximum daytime temperatures around 15°C (59°F), minimum nighttime temperatures around 7°C (45°F) and high monthly rainfall. So on average the conditions are unpleasant that month.

« September
October
November »
September
October
November
Max temperature
23°C (73°F)
15°C (59°F)
9°C (48°F)
Min temperature
13°C (55°F)
7°C (45°F)
1°C (34°F)
Monthly sun hours
206 hours
158 hours
82 hours
Monthly rainfall
86 mm (3.4 in)
103 mm (4.1 in)
60 mm (2.4 in)
Monthly rainy days
12 days
15 days
12 days
Weather conditions
perfect
unpleasant
poor
Climate in Niagara Falls →

Mississauga

In October Mississauga generally has moderate temperatures with maximum daytime temperatures around 15°C (59°F), minimum nighttime temperatures around 7°C (45°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« September
October
November »
September
October
November
Max temperature
23°C (73°F)
15°C (59°F)
9°C (48°F)
Min temperature
13°C (55°F)
7°C (45°F)
1°C (34°F)
Monthly sun hours
216 hours
165 hours
96 hours
Monthly rainfall
80 mm (3.1 in)
86 mm (3.4 in)
81 mm (3.2 in)
Monthly rainy days
9 days
10 days
11 days
Weather conditions
perfect
tolerable
poor
Climate in Mississauga →

Niagara on the Lake

In October Niagara on the Lake generally has low temperatures with maximum daytime temperatures around 12°C (54°F), minimum nighttime temperatures around 5°C (41°F) and moderate monthly rainfall. So on average the conditions are unpleasant that month.

« September
October
November »
September
October
November
Max temperature
17°C (63°F)
12°C (54°F)
7°C (45°F)
Min temperature
9°C (48°F)
5°C (41°F)
1°C (34°F)
Monthly sun hours
206 hours
158 hours
82 hours
Monthly rainfall
60 mm (2.4 in)
64 mm (2.5 in)
41 mm (1.6 in)
Monthly rainy days
9 days
11 days
9 days
Weather conditions
tolerable
unpleasant
poor
Climate in Niagara on the Lake →

Is your destination not in the list? Have a look at all destinations in Ontario, in Canada.

Popular cities in October

Day & night temperatures, rainfall and average weather in Ontario in October.

City Weather Day temp Night temp Rainfall
Toronto 16°C (61°F) 8°C (46°F) 91 mm (3.6 in)
Ottawa 14°C (57°F) 4°C (39°F) 102 mm (4 in)
Niagara Falls 15°C (59°F) 7°C (45°F) 103 mm (4.1 in)
Mississauga 15°C (59°F) 7°C (45°F) 86 mm (3.4 in)
Niagara on the Lake 12°C (54°F) 5°C (41°F) 64 mm (2.5 in)
Kingston 15°C (59°F) 7°C (45°F) 109 mm (4.3 in)

Ontario weather in October: frequently asked questions

What is the weather like in Ontario, Canada in October?

Ontario, Canada typically experiences tolerable weather in October, part of the season. Daytime highs in Toronto average around 16°C (61°F), and temperatures drop to about 8°C (46°F) at night.

What is the average temperature in Ontario, Canada in October?

Average temperatures in Ontario, Canada during October range from a nighttime low near 8°C (46°F) to a daytime high around 16°C (61°F) in Toronto.

Does Ontario, Canada get a lot of rain in October?

Not particularly. Toronto averages just 91 mm (3.6 in) of rain in October, making it a mostly dry month for Ontario, Canada.

Is October a Good Time to Visit Ontario, Canada?

In our opinion, October is a good time to visit Ontario, Canada with overall tolerable weather in Toronto. However, the weather conditions may vary depending on your destination.

On average, the best time to visit Ontario, Canada is in June, July, August and September with generally perfect weather in Toronto. In contrast, January, February, March, April, November and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in Ontario.

Weather and climate has detailed information for every country in the world. Are you going to Canada? Get detailed historical weather averages for many cities in Canada.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.

Visit Algonquin Park

Algonquin park is one of the best places to experience the Canadian wilderness and learn more about the nation’s cultural history. It is open year round and offers a variety of activities depending on the season.
Canoeing the south Nahannii

The South Nahanni in the northwest of Canada is one of the most impressive wilderness rivers in the world. Canoeing the south Nahanni is something you must add to your bucket list.
See Polar Bears in Churchill Canada

Thousands of bears gather at the small town of Churchill. In the evening the northern lights give a light show against the dark evening sky. An unforgettable experience.
Banff National Park

Snowy mountains, clear blue lakes and green forests make Banff National Park a wonderful bucket list destination. The pristine wilderness is a mecca for walkers.
Must visit in Canada →