Guelph weather
Best months for weather: May–Sep. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Guelph, Ontario, Canada.
Best Time to Visit
Peak season May–SepOff season Nov–Mar
Guelph weather by month
When is the best time to visit Guelph?
Based on weather alone, the best time to visit Guelph is May–Sep, according to NASA's 2001–2025 climate averages. Nov–Mar tends to be the least pleasant. Average highs run from -2°C (28°F) in January to 29°C (83°F) in July.
What is the rainiest month in Guelph?
July is the wettest month, with about 78 mm (3.1 in) of rain on average. February is the driest, with about 48 mm (1.9 in).
What is the hottest month in Guelph?
July is the warmest, with average highs of 29°C (83°F) and lows of 16°C (61°F). January is the coolest, with highs of -2°C (28°F) and lows of -10°C (14°F).
Does Guelph have a rainy season?
Not a strong one. No month averages more than 150 mm of rain; the wettest is July at about 78 mm (3.1 in).
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), forecast and current conditions from Open-Meteo. Page updated . How we rate months