Guelph (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Guelph.
Climate overview of Guelph
Guelph, Ontario, Canada, experiences significant temperature variation throughout the year. Summers bring daytime highs of 27°C (81°F) in July, while winters cool to -1°C (30°F) in January.
With around 976 mm (38 in) of annual rain/snowfall, the city has moderate precipitation levels. June is the wettest month and February the driest. It also has warm summers and very cold winters. The most sunshine falls in July, with an average of 10.2 hours of daily sunshine.
Guelph Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Guelph - and find the best time to visit.
Monthly Temperature in Guelph
Depending on the time of the year, temperatures range from comfortable to very cold in Guelph. Typically, average maximum daytime temperatures range from a comfortable 27°C (81°F) in July to a very cold -1°C (30°F) in the coolest month, January.
Nights vary from 15°C (59°F) in July to around -10°C (14°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Guelph
Generally, Guelph has a moderate amount of precipitation, averaging 976 mm (38 in) of rain/snowfall annually. Precipitation levels in Guelph remain relatively steady throughout the year. June has the most rain, with 101 mm (4 in) over 11 days. In the driest month February, this drops slightly to 65 mm (2.6 in), making the city's climate fairly predictable. For more details, please visit our Guelph Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Guelph
For those who appreciate different seasons, Guelph serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 10.2 hours of sunshine daily, and embrace the darker days in December, offering only 2.4 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Best Time to Visit Guelph
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Fewer rainy days: May, June, July, August and September
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -10°C (14°F).
Frequently asked questions about the climate in Guelph
What is the best time to visit Guelph?
May, July, August and September typically offer the most optimal weather in Guelph. In contrast, January, February, March, November and December tend to have less optimal conditions. Guelph has warm summers and very cold winters.
What temperatures can I expect in Guelph?
Daytime highs range from -1°C (30°F) in January to 27°C (81°F) in July. Nighttime lows range from -10°C (14°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Guelph get?
Annual rainfall is around 976 mm (38 in). June is the wettest month with 101 mm (4 in), while February is the driest with 65 mm (2.6 in).
How sunny is Guelph?
Guelph receives around 2,120 hours of sunshine per year. July is the sunniest month with 305 hours, while December is the cloudiest with just 72 hours. Overall, Guelph enjoys abundant sunshine.
Guelph 3-Day Forecast
Guelph on the map
Guelph is highlighted - select any city to see its climate.
Popular this month
Where to go in September - average daytime high across popular destinations.
Toronto
22°C (72°F) Niagara Falls23°C (73°F) Montréal
22°C (72°F) Ottawa22°C (72°F) Quebec City
20°C (68°F) Vancouver19°C (66°F) Calgary19°C (66°F) Whistler15°C (59°F) 
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