<div itemscope itemtype="https://schema.org/VideoObject"><meta itemprop="uploadDate" content="Sun Aug 07 2022 19:36:01 GMT-0400 (Eastern Daylight Time)"/><meta itemprop="name" content="Razar sharp front divides summer and fall-like conditions across Ontario and Quebec"/><meta itemprop="description" content="Severe thunderstorms and flooding rains are in the forecast along a razor sharp boundary, diving high humidity and chilly temperatures. Meteorologist Rachel Modestino has more"/><meta itemprop="duration" content="P0Y0M0DT0H1M11S" /><meta itemprop="thumbnailUrl" content="https://content.jwplatform.com/thumbs/kCjuHY1x-1920.jpg"/><meta itemprop="contentUrl" content="https://content.jwplatform.com/videos/kCjuHY1x-JXpetW4I.mp4"/><script src="https://cdn.jwplayer.com/players/kCjuHY1x-pF5qn7BW.js"></script></div>

More widespread active weather is in store for southern Ontario and Quebec. A developing low-pressure system will trigger rainfall and thunderstorms in central Canada, but some regions will miss out on significant rainfall. The storm threat  should remain non-severe in nature. Any storms that do pop up may produce heavy rain and strong wind gusts. For details on the heat, humidity and thunderstorm risks for Monday, read below.

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__MUST READ: [What to take on a day trip to the sunflower fields](https://www.theweathernetwork.com/ca/news/article/shop-the-weather-tips-for-visiting-a-sunflower-field)__

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### __Monday: Stormy pattern lingers, but risk diminishes__

Beyond the weekend, the active weather pattern will continue Monday.

A developing low-pressure system early Monday will allow for more widespread rainfall and thunderstorms across southern Ontario and Quebec, but some regions will miss out on significant rainfall. 

![MonRiskONQC](//images.ctfassets.net/c55i45ef3o2a/pAuHgBMsjM20JqHv5EhbD/506a16e0132dbf51bdbb68ad9235a516/CF.jpg)

The storm threat will remain confined to southern Ontario and should remain non-severe in nature. Any storms that do pop up may produce heavy rain and strong wind gusts.

By Tuesday, the active weather wanes and temperatures will fall substantially compared to Monday and what was seen on the weekend.

As well, the extreme heat and humidity will ease by the middle and end of this week.

__MUST READ: [Your mid-summer guide to lawn maintenance products](https://www.theweathernetwork.com/ca/news/article/shop-the-weather-ongoing-lawn-maintenance)__

### __WATCH: How a single Ontario storm can skew your perception of summer__

<div itemscope itemtype="https://schema.org/VideoObject"><meta itemprop="uploadDate" content="Thu Aug 04 2022 12:21:38 GMT-0400 (Eastern Daylight Time)"/><meta itemprop="name" content="How a single Ontario storm can skew your perception of summer"/><meta itemprop="description" content="Some parched communities received an entire month&#39;s worth of rain on August 3, while others stayed perfectly dry. Meteorologist Jessie Uppal explains how this localized drenching occurs."/><meta itemprop="duration" content="P0Y0M0DT0H1M12S" /><meta itemprop="thumbnailUrl" content="https://content.jwplatform.com/thumbs/G9UinXXA-1920.jpg"/><meta itemprop="contentUrl" content="https://content.jwplatform.com/videos/G9UinXXA-JXpetW4I.mp4"/><script src="https://cdn.jwplayer.com/players/G9UinXXA-WnAZH7xE.js"></script></div>

*Stay tuned to The Weather Network for the latest forecast details for southern Ontario and Quebec.*

*Thumbnail courtesy of Louise, taken in Meaford, Ont.*

Growing storm chance with flooding risk in parts of Central Canada

Forecasts

The hot, muggy conditions in southern Ontario and Quebec could spark thunderstorms Monday, heightening a threat for flooding in some areas due to possible torrential rainfall.

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