Ontario

Guelph Facing Thunderstorm Risk and Showers This Week

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boringnews
August 17, 2026 2:40 pm

Guelph, Ontario is in for an unsettled stretch of weather this week, with a mix of sun and cloud, a risk of thunderstorms, and several chances of showers through mid-week. According to Environment Canada, Tuesday is among the warmest days this week, reaching 26°C with a humidex of 31, but unsettled conditions keep rain in the forecast.

As of Monday afternoon, no weather alerts are in effect for Guelph. The Weather Network reported partly cloudy skies with a temperature of 22°C, feeling like 25°C, and a humidity of 73 per cent. Environment Canada’s station at the Guelph Turfgrass Institute recorded 22.9°C with a humidex of 27 and light northwest winds.

The forecast for Tuesday calls for sunny skies becoming a mix of sun and cloud with southwest winds gusting to 40 km/h. Tuesday night brings a 60 per cent chance of showers, and Wednesday holds a 40 per cent chance of showers with a high of 24°C. Residents planning outdoor activities should keep an eye on the sky and be prepared for sudden changes.

This week’s pattern follows a hot and stormy start to August across Ontario. Environment Canada issued a severe thunderstorm warning for Guelph and surrounding areas on August 12, with strong wind gusts, quarter-size hail, and heavy rain possible. While no alerts are currently active, the atmosphere remains unstable enough for possible afternoon thunderstorms.

Drier, sunnier conditions are expected later in the week, with highs of 25°C to 26°C. However, until the system moves out, locals should stay updated on forecasts and be aware of the risk of localized flooding and gusty winds.

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