Weather For Mississauga

Home › Weather › Weather For Mississauga

By Hannah Walsh, Politics & Public Affairs EditorReviewed by Andrew LeblancForecast data: Open-Meteo & Environment and Climate Change Canada

Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Scope Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.

The live forecast above shows current conditions for Mississauga. This city, part of the Greater Toronto Area, has a humid continental climate with warm, humid summers and cold, snowy winters, moderated somewhat by Lake Ontario to the south.

What does the weather in Mississauga typically feel like?

Summers (June to August) bring average highs near 26 °C and overnight lows around 17 °C, often with humidity. Winters (December to February) see average highs near –1 °C and lows around –7 °C, with about 120 cm of seasonal snowfall. Spring and autumn are transitional, with cool mornings and milder afternoons. For weather mississauga hourly or weather in mississauga tomorrow, check the live forecast above for precise timings.

How does Lake Ontario affect local conditions?

Lake Ontario moderates temperature extremes: spring is cooler near the lake, while autumn stays warmer. The lake also fuels lake-effect snow bands, especially in areas like Erin Mills, so weather near erin mills mississauga can differ from the northern part of the city. For details on lake-effect risks, visit our Weather Warning page.

Highest avg. temp (July)26 °C (high) / 17 °C (low)

Coldest avg. temp (January)–1 °C (high) / –7 °C (low)

Annual precipitation~800 mm (rain + meltwater from snow)

Average seasonal snowfall~120 cm

Can I rely on a free 30 day weather forecast for Mississauga?

Long‑range forecasts offer a general trend but become unreliable beyond 10–14 days. For trip planning, use the 21 day weather forecast Mississauga products cautiously and always check the live forecast above for updates.

What’s the best month to visit Mississauga?

Many travellers prefer late May to early October, when temperatures are mild and outdoor activities are comfortable. July and August are warmest, but humidity can be high. The live forecast above shows current conditions for your travel dates.

How does the weather in Mississauga compare to nearby Toronto?

Mississauga is generally 1–2 °C cooler than downtown Toronto due to less urban heat island effect and proximity to Lake Ontario. However, rainfall and snow amounts are very similar. For Toronto details, see our Toronto Weather page.