Sarnia
May
Weather in Sarnia for May 2027
Your guide to Sarnia weather in May - trends and predictions
In general, the average temperature in Sarnia at the beginning of May is 12.9 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 18.1 °C by the end of May.
Sarnia experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 134.8 mm.
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Temperatures
Rain 🌧️
More
9
Dry days
22
Rainy days
0
Snow days
16°/8°
Temperatures
22 km/h
Avg max wind
78 %
Avg humidity
Sarnia Weather May
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Temperatures trend during May in Sarnia
See the weather trend as well as the moving average line
May weather in Sarnia day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Patchy rain possible | 13° /4° | 5.4 mm | 4 | |
| 2 May |  Overcast | 9° /3° | 2.4 mm | 4 | |
| 3 May |  Moderate or heavy rain shower | 12° /4° | 7.2 mm | 4 | |
| 4 May | Patchy rain possible | 14° /6° | 7.3 mm | 5 | |
| 5 May | Patchy rain possible | 14° /6° | 4.9 mm | 4 | |
| 6 May |  Partly cloudy | 13° /6° | 3.7 mm | 5 | |
| 7 May | Moderate or heavy rain shower | 15° /5° | 3.3 mm | 5 | |
| 8 May | Overcast | 14° /6° | 0.1 mm | 4 | |
| 9 May | Overcast | 13° /5° | 1.5 mm | 4 | |
| 10 May | Overcast | 15° /5° | 0.4 mm | 5 | |
| 11 May | Partly cloudy | 13° /5° | 2.4 mm | 5 | |
| 12 May | Patchy rain possible | 18° /6° | 1.1 mm | 6 | |
| 13 May | Light rain shower | 18° /10° | 6.4 mm | 4 | |
| 14 May | Partly cloudy | 15° /8° | 4 mm | 4 | |
| 15 May |  Sunny | 19° /7° | 0 mm | 6 | |
| 16 May | Overcast | 22° /10° | 6.6 mm | 6 | |
| 17 May | Sunny | 17° /10° | 3 mm | 5 | |
| 18 May | Sunny | 19° /10° | 0.9 mm | 5 | |
| 19 May | Moderate or heavy rain shower | 20° /10° | 5.1 mm | 5 | |
| 20 May | Overcast | 17° /7° | 3 mm | 4 | |
| 21 May | Sunny | 17° /11° | 31.3 mm | 4 | |
| 22 May |  Cloudy | 19° /9° | 6.4 mm | 6 | |
| 23 May | Sunny | 16° /9° | 3.3 mm | 4 | |
| 24 May | Overcast | 16° /8° | 0.6 mm | 4 | |
| 25 May | Overcast | 17° /8° | 2.7 mm | 6 | |
| 26 May | Sunny | 19° /9° | 0 mm | 6 | |
| 27 May | Sunny | 19° /9° | 2.1 mm | 6 | |
| 28 May | Sunny | 16° /9° | 0.2 mm | 6 | |
| 29 May | Sunny | 17° /9° | 12.7 mm | 6 | |
| 30 May | Sunny | 18° /9° | 0 mm | 6 | |
| 31 May | Sunny | 21° /9° | 0.6 mm | 6 | |
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Important Notice
Our weather forecast for Sarnia in May 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 May - FAQ
What are the expected maximum and minimum temperatures in Sarnia during May?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Sarnia during May?
Significant rainfall exceeding 134.8 mm is expected in Sarnia during May, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Sarnia during May?
The average wind speed in Sarnia during May is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Sarnia
Explore the daily rainfall trends and prepare for Sarnias May weather 💧
Typically, Sarnia has 22 rainy days in May with a total of 134.8 mm of rainfall.
UV exposure in Sarnia during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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