Mainly cloudy skies will start the day with showers expected to begin early in the afternoon.
As the rain moves in, there is a risk of a thunderstorm as well with winds out of the southwest at 20 km/h and gusts to 40 km/h late in the morning.
Wednesday's high is expected to hit 21C with the humidex reaching 25C.
Gas prices jumped overnight so fill up if you can find a lower price.
Cheapest gas in the city this morning according to GasBuddy is 102.9 at the Mac's 617 Main St E & John St.
Most expensive is 111.3 at the PetroCanada, 1119 Algonquin Ave & Greenwood Ave.
Ontario average is 105.7 with prices rising.