Toronto temperatures are going to swing by 15 C next week

Since the scorching, multi-day heat wave in southern Ontario last week, temperatures have remained warm and tolerable here in Toronto, but that will soon change again as we head into the new work week.

While humidex values won't reach the mid-40s mark like they did on Canada Day and last Thursday, temperatures will be heating up considerably over the weekend. According to Environment Canada's 7-day forecast, Toronto is looking at a daytime high of 28 degrees C on Friday, coupled with a 30 per cent chance of showers and thunderstorms.

Despite this, it's looking like it'll be a sunny, precipitation-free weekend, with daytime highs of 28 C and 29 C on Saturday and Sunday, respectively. On both days, nighttime lows will dip to 18 C.

Toronto's 7-day forecast for the week of July 9 to 15. Photo: Environment Canada. 

Things will really start to heat up on Monday, when the daytime high is expected to reach 31 C (which will feel much closer to 34 C with the humidity). A nighttime low of 20 C will provide some temporary relief, but temperatures will rebound again on Tuesday, reaching a peak of 33 C mid-day, which is expected to feel like 40 C, factoring in the humidity.

Temperatures will dip ever so slightly on Wednesday, when an afternoon high of 30 C is expected to feel like 37 C. According to The Weather Network's 14-day forecast, the remainder of the week is expected to remain just as hot, although cooler nighttime temperatures in the low-20s will provide some much-needed relief.

If you're wondering how the rest of July will play out, the Old Farmer's Almanac predicts in its long-range forecast for southern Ontario that the average temperature this month will be 21 C, which is 1 C below average in southeastern Ontario, and 1 C above average in southwestern Ontario.

Precipitation totals are expected to reach 95 mm, which is roughly 70 mm above average for the east, and 40 mm below average for the west.

Between July 16 and 25, more scattered thunderstorms are expected, along with cooler conditions in the east and warmer temperatures in the west. July is anticipated to end on a stormy, but hot note, according to the outlook, which predicts increased precipitation between July 26 and 31.