Thornbury (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Thornbury.
Climate overview of Thornbury
Thornbury, Ontario, Canada, sees big temperature differences between seasons, with July peaking at 24°C (75°F) and February dropping to -2°C (28°F).
With around 1102 mm (43 in) of annual rain/snowfall, Thornbury has a notably wet climate. The wettest month is November.
Thornbury Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Thornbury — and find the best time to visit.
Monthly Temperature in Thornbury
Visitors to Thornbury can expect significant temperature changes throughout the year. Average daytime temperatures reach a comfortable 24°C (75°F) in July. In February, the coolest month of the year, temperatures drop to a very cold -2°C (28°F).
At night, temperatures range from around 17°C (63°F) in July to -10°C (14°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Thornbury
Thornbury is known for its substantial rain/snowfall, with annual precipitation reaching 1102 mm (43 in). Despite minor fluctuations, Thornbury enjoys fairly consistent precipitation throughout the year. In November, you can expect around 109 mm (4.3 in) of precipitation, while in March, Thornbury receives about 71 mm (2.8 in). For more details, please visit our Thornbury Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Thornbury
The weather does bring rainfall during this period, between 84 mm (3.3 in) and 98 mm (3.9 in). Planning your next adventure but unsure where to go? Our climate tool suggests perfect locations tailored to your preferred weather conditions. Discover your ideal travel destination with our weather planner.
Frequently asked questions about the climate in Thornbury
What is the best time to visit Thornbury?
June, July, August and September typically offer the most optimal weather in Thornbury. In contrast, January, February, March, April, November and December tend to have less optimal conditions.
What temperatures can I expect in Thornbury?
Daytime highs range from -2°C (28°F) in February to 24°C (75°F) in July. Nighttime lows range from -10°C (14°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Thornbury get?
Annual rainfall is around 1102 mm (43 in). November is the wettest month with 109 mm (4.3 in), while March is the driest with 71 mm (2.8 in).
Thornbury 3-Day Forecast
Thornbury (ON) 3-Day Forecast
Thornbury on the map
Thornbury is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
Niagara Falls
27°C (81°F) Montréal28°C (82°F) Ottawa27°C (81°F) Quebec City
26°C (79°F) Toronto26°C (79°F) Calgary24°C (75°F) Vancouver22°C (72°F) Whistler
19°C (66°F) 
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