Weather in Sarnia in July
Sarnia, Canada averages a high of 26.3°C (79.3°F) and low of 18.7°C (65.7°F) in July, with 10 rain days and 12.7 hours of daily sunshine. Travel score: 82.6/100 (Excellent). The best time to visit Sarnia is August.
High
26°C79°F
Low
19°C66°F
🌧️
10
rain days
☀️
12.7
hrs/day sunshine
💧
72%
humidity
83— Excellent
July in Sarnia is warm and occasionally wet — ideal for sightseeing and outdoor activities.
What are the average temperatures in Sarnia?
How much does it rain in Sarnia in July?
Sarnia receives an average of 71.2mm of rainfall across 10 rainy days in July. The annual total is 825mm.
What should I pack for Sarnia in July?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 26°C
🧴
Sunscreen SPF 30+
13 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Light rain jacket
Some rainy days expected (10 days)
☔
Umbrella
Be prepared for occasional showers
Traveling to Canada in July?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31