Daily Forecast: July 17, 2025

A mix of sun and cloud is expected for Southwestern Ontario and the GTA tomorrow. Some rounds of rain will affect Central and Eastern Ontario.

There will be a risk for thunderstorms tomorrow in Eastern Ontario as well, with some becoming strong to severe.

Heat Warnings remain in place this evening. As a cold front passes through the area tomorrow, more comfortable temperatures are expected for Friday.

Rainfall Warnings are in effect for some areas tonight. Local rainfall amounts up to 80 millimetres are possible by tomorrow morning.

Temperatures in red represent forecasted humidex values.