Sarnia
July
Weather in Sarnia for July 2026
Your guide to Sarnia weather in July - trends and predictions
Squall Warning - See hour by hour.
So far, July 2026 in Sarnia shows a warmer trend than usual by 2.7 °C.
The forecast for the upcoming days in Sarnia predicts a temperature of 25.5 °C, which is slightly above the historical average.
In general, the average temperature in Sarnia at the beginning of July is 26.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 25.7 °C by the end of July.
Sarnia experiences heavy rainfall in July, with over 20 rainy days and an average total precipitation 144.5 mm.
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Temperatures
Rain 🌧️
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6
Dry days
25
Rainy days
0
Snow days
26°/17°
Temperatures
18 km/h
Avg max wind
78 %
Avg humidity
Sarnia Weather July
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Temperatures trend during July in Sarnia
See the weather trend as well as the moving average line
July weather in Sarnia day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Jul. |  Patchy rain possible | 27° /18° | 3.1 mm | 7 | |
| 2 Jul. |  Moderate or heavy rain shower | 28° /17° | 4 mm | 7 | |
| 3 Jul. | Moderate rain at times | 27° /18° | 2.7 mm | 7 | |
| 4 Jul. |  Overcast | 28° /17° | 1.5 mm | 7 | |
| 5 Jul. | Patchy rain possible | 28° /18° | 10.9 mm | 6 | |
| 6 Jul. | Light rain shower | 26° /18° | 8 mm | 7 | |
| 7 Jul. |  Sunny | 24° /16° | 0 mm | 7 | |
| 8 Jul. | Patchy rain possible | 26° /16° | 1.6 mm | 7 | |
| 9 Jul. | Moderate or heavy rain shower | 25° /18° | 12.3 mm | 7 | |
| 10 Jul. | Overcast | 24° /17° | 14.3 mm | 7 | |
| 11 Jul. | Moderate or heavy rain shower | 26° /17° | 4.7 mm | 7 | |
| 12 Jul. | Overcast | 27° /17° | 31.3 mm | 7 | |
| 13 Jul. | Patchy rain possible | 28° /17° | 5.5 mm | 7 | |
| 14 Jul. |  Cloudy | 30° /18° | 1.6 mm | 7 | |
| 15 Jul. | Sunny | 29° /20° | 3.3 mm | 8 | |
| 16 Jul. | Patchy rain possible | 28° /18° | 4.2 mm | 7 | |
| 17 Jul. | Overcast | 25° /17° | 0.2 mm | 7 | |
| 18 Jul. | Overcast | 24° /16° | 2.7 mm | 7 | |
| 19 Jul. | Sunny | 24° /14° | 3.3 mm | 7 | |
| 20 Jul. | Overcast | 25° /15° | 3.3 mm | 7 | |
| 21 Jul. | Overcast | 24° /17° | 5.3 mm | 6 | |
| 22 Jul. | Patchy rain possible | 24° /14° | 0.2 mm | 7 | |
| 23 Jul. | Patchy rain possible | 27° /15° | 1.2 mm | 7 | |
| 24 Jul. | Overcast | 27° /16° | 1.6 mm | 7 | |
| 25 Jul. | Overcast | 26° /16° | 4 mm | 7 | |
| 26 Jul. | Moderate rain at times | 27° /17° | 2.4 mm | 7 | |
| 27 Jul. | Overcast | 28° /18° | 0.7 mm | 7 | |
| 28 Jul. | Sunny | 23° /19° | 11.5 mm | 6.5 | |
| 29 Jul. | Sunny | 22° /17° | 0 mm | 7.8 | |
| 30 Jul. | Sunny | 25° /17° | 0 mm | 8.1 | |
| 31 Jul. | Sunny | 29° /17° | 0.5 mm | 7.8 | |
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Important Notice
Our weather forecast for Sarnia in July is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Sarnia forecast closer to your planned date for the most up-to-date weather information.
Change Month
Sarnia in July - FAQ
What are the expected maximum and minimum temperatures in Sarnia during July?
During July, expect a variety of temperatures with highs around 26° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Sarnia during July?
Significant rainfall exceeding 144.5 mm is expected in Sarnia during July, occurring over more than 25 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Sarnia during July?
The average wind speed in Sarnia during July is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
July rainfall patterns in Sarnia
Explore the daily rainfall trends and prepare for Sarnias July weather 💧
Typically, Sarnia has 25 rainy days in July with a total of 144.5 mm of rainfall.
UV exposure in Sarnia during July
Stay informed about UV levels for safe outdoor activities throughout the month of July ☀️
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