Lambton County (Sarnia)
May
Weather in Lambton County for May 2026
Your guide to Lambton County weather in May - trends and predictions
Frost Advisory - See hour by hour.
Until now, May 2026 in Lambton County is slightly cooler than the historical average by -1.2 °C.
The forecast for the upcoming days in Lambton County predicts a temperature of 15.3 °C, which is slightly above the historical average.
In general, the average temperature in Lambton County at the beginning of May is 12.9 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 17.4 °C by the end of May.
Lambton County in May brings notable rainfall, with an average of 20 rainy days and a total precipitation of 148.4 mm.
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Temperatures
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11
Dry days
20
Rainy days
0
Snow days
16°/8°
Temperatures
21 km/h
Avg max wind
78 %
Avg humidity
Lambton County Weather May
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Temperatures trend during May in Lambton County
See the weather trend as well as the moving average line
May weather in Lambton County 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 |  Sunny | 13° /4° | 0 mm | 6 | |
| 12 May | Patchy rain possible | 13° /3° | 2.1 mm | 6.1 | |
| 13 May | Patchy rain possible | 11° /6° | 2.7 mm | 2.9 | |
| 14 May | Patchy rain possible | 11° /5° | 0.3 mm | 4.4 | |
| 15 May | Patchy rain possible | 15° /4° | 0.8 mm | 0.5 | |
| 16 May | Partly cloudy | 14° /5° | 0 mm | 3 | |
| 17 May | Patchy rain possible | 20° /12° | 1.7 mm | 4 | |
| 18 May | Patchy rain possible | 14° /10° | 0.1 mm | 3 | |
| 19 May | Patchy rain possible | 22° /11° | 0.6 mm | 4 | |
| 20 May | Patchy rain possible | 16° /8° | 4.5 mm | 3 | |
| 21 May | Patchy rain possible | 18° /8° | 0.2 mm | 3 | |
| 22 May | Patchy rain possible | 18° /8° | 0.3 mm | 3 | |
| 23 May | Patchy rain possible | 15° /5° | 0.3 mm | 3 | |
| 24 May | Patchy rain possible | 14° /9° | 0.8 mm | 3 | |
| 25 May | Sunny | 15° /8° | 3.6 mm | 4 | |
| 26 May | Sunny | 17° /7° | 0 mm | 5 | |
| 27 May | Sunny | 19° /9° | 2.9 mm | 5 | |
| 28 May | Sunny | 17° /10° | 0.2 mm | 4 | |
| 29 May | Sunny | 15° /9° | 17 mm | 4 | |
| 30 May | Sunny | 19° /10° | 0 mm | 5 | |
| 31 May | Sunny | 20° /10° | 0.8 mm | 5 | |
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Important Notice
Our weather forecast for Lambton County 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 Lambton County forecast closer to your planned date for the most up-to-date weather information.
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Lambton County in May - FAQ
What are the expected maximum and minimum temperatures in Lambton County 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 Lambton County during May?
Significant rainfall exceeding 148.4 mm is expected in Lambton County during May, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Lambton County during May?
The average wind speed in Lambton County during May is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Lambton County
Explore the daily rainfall trends and prepare for Lambton Countys May weather 💧
Typically, Lambton County has 20 rainy days in May with a total of 148.4 mm of rainfall.
UV exposure in Lambton County during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Where is Lambton County?Get accurate weather forecasts for Lambton County, located at latitude 42.979 and longitude -82.404. Stay updated with localized weather information tailored for Lambton County.
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