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Mississauga Weather in October
October in Mississauga typically sees daytime highs of 15°C (59°F) and nighttime lows of 7°C (45°F). Rainfall is also possible this month, so it's worth packing an umbrella.
Rainfall in Mississauga in October
Based on our climate data of the past 30 years, about 10 days of rain are anticipated, with 86 mm (3.4 in) on average. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Mississauga in October
October in Mississauga brings typical temperatures with highs around 15°C (59°F) and lows of 7°C (45°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With lows around 7°C (45°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Mississauga in October
The area enjoys a balanced 165 hours of sunlight, ensuring it's neither too overcast nor too sunny.If you prefer dry days with pleasant temperatures, June, July, August and September typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Mississauga Temperature in October
Min Temperature
7°C (45°F)
Max Temperature
15°C (59°F)
Chance of Rain
34%
Precipitation
86 mm (3.4 in)
Rainy days
10 days
Humidity
62%
Sunshine
165 hours
Percentage Sunshine
48%
Mississauga Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Mississauga - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Mississauga typically drop from around 17°C (63°F) at the start of October to approximately 11°C (52°F) by the end. Nights are cold, with lows typically ranging from 3°C (37°F) to 10°C (50°F).
Average temperatures in October
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in October
Historical weather records for Mississauga in October
Browse day-by-day weather records for Mississauga spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Mississauga historical weather extremes in October
The extremes listed below come from historical weather data collected in Mississauga from 1976 through 2025.
- Mississauga recorded its highest October temperature of 29°C (84°F) on October 3, 2023.
- The lowest daytime temperature in October was 3°C (37°F), recorded on October 30, 2020.
- Mississauga registered its coldest October night on October 30, 1983, with temperatures dropping to -5°C (23°F).
Best Places in Canada in October
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in October →
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).
What to Wear in Mississauga in October
Pack for changing conditions in Mississauga in October. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes. Bring sunglasses since you'll have some sunny periods throughout the month
What To Do in Mississauga in October
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming5/10 -
Cycling6/10 -
Walking6/10 -
Camping4/10 -
Outdoor sports9/10
Mississauga 3-Day Forecast
More climate data for Mississauga
Temperature Rainfall Sunshine Humidity
See the full Mississauga climate overview or explore weather in Canada.
Popular in October
Where to go in October - average daytime high across popular destinations.
Toronto
16°C (61°F) Niagara Falls15°C (59°F) Montréal14°C (57°F) Ottawa14°C (57°F) Vancouver
14°C (57°F) Quebec City12°C (54°F) Calgary
12°C (54°F) Whistler7°C (45°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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