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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Toronto Post Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
The live forecast above shows Guelph’s high near the seasonal norm of 23°C with a 40% chance of showers this afternoon. A weak cold front will bring a noticeable drop in humidity by evening, making for a comfortable night.
What’s the forecast for today and tonight?
Highs will reach 22–24°C under partly cloudy skies, with the best chance of rain (40–50%) between 2 p.m. and 6 p.m. Winds shift from southwest 15 km/h to northwest 10 km/h after sunset. Overnight lows settle near 12°C with clearing skies. If you’re checking weather in guelph tomorrow, expect similar temperatures but less rain.
How does this week shape up?
For those looking at guelph weather 7 days or weather in guelph 10 days, a ridge of high pressure builds in by Wednesday, pushing highs to 26°C and keeping rain chances below 20% through Friday. The guelph weather 30 days outlook from Environment Canada suggests a return to near‑average temperatures by late month. This weekend’s weather for guelph this weekend looks dry and sunny, with highs near 25°C on Saturday.
Will it rain on the weekend?
No. A dry high‑pressure system moves in Friday, keeping Saturday and Sunday mostly sunny with highs near 25°C. The weather for guelph today is the only wet day until Monday.
What’s the UV index today?
Moderate (5) between 11 a.m. and 3 p.m. Health Canada recommends sunscreen if you’re spending more than 30 minutes outdoors, especially with partly cloudy skies that can amplify exposure.
How reliable is the 10‑day forecast?
For weather in guelph 10 days, the first 5 days have high confidence (70–80%) from Environment Canada. Days 6–10 are more uncertain; check guelph weather hourly updates for changes.