Simcoe County (Alliston)
May
Weather in Simcoe County for May 2026
Your guide to Simcoe County weather in May - trends and predictions
Until now, May 2026 in Simcoe County is cooler than usual, with temperatures averaging 10.9 °C, this is -2.9 °C below the typical seasonal average.
The forecast for the next days in Simcoe County predicts temperatures to be around 14 °C, close to the historical average.
In general, the average temperature in Simcoe County at the beginning of May is 13.6 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 18.9 °C by the end of May.
Simcoe County in May brings notable rainfall, with an average of 19 rainy days and a total precipitation of 134.8 mm.
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Temperatures
Rain 🌧️
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12
Dry days
19
Rainy days
0
Snow days
17°/7°
Temperatures
19 km/h
Avg max wind
77 %
Avg humidity
Simcoe County Weather May
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Temperatures trend during May in Simcoe County
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May weather in Simcoe County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Light rain | 12° /2° | 13.2 mm | 4 | |
| 2 May |  Overcast | 9° /3° | 0.1 mm | 4 | |
| 3 May |  Patchy rain possible | 13° /2° | 1.5 mm | 4 | |
| 4 May |  Fog | 18° /6° | 0.8 mm | 5 | |
| 5 May | Light drizzle | 15° /7° | 1 mm | 4 | |
| 6 May |  Sunny | 15° /6° | 5.2 mm | 5 | |
| 7 May | Overcast | 13° /3° | 7.1 mm | 5 | |
| 8 May | Patchy rain possible | 14° /3° | 1.4 mm | 5 | |
| 9 May | Light rain shower | 15° /3° | 1.7 mm | 5 | |
| 10 May | Patchy rain possible | 12° /3° | 0.2 mm | 4 | |
| 11 May | Sunny | 12° /1° | 0 mm | 5.9 | |
| 12 May | Patchy rain possible | 14° /0° | 2.5 mm | 6.4 | |
| 13 May | Patchy rain possible | 10° /4° | 4.7 mm | 3.2 | |
| 14 May | Patchy rain possible | 7° /3° | 0.6 mm | 1 | |
| 15 May | Patchy rain possible | 13° /2° | 4 mm | 0.7 | |
| 16 May | Sunny | 14° /1° | 0 mm | 3 | |
| 17 May | Patchy rain possible | 19° /6° | 1.9 mm | 3 | |
| 18 May | Overcast | 13° /7° | 0 mm | 2 | |
| 19 May |  Moderate rain | 10° /7° | 11.8 mm | 2 | |
| 20 May | Patchy rain possible | 14° /8° | 5 mm | 3 | |
| 21 May |  Partly cloudy | 17° /7° | 0 mm | 4 | |
| 22 May | Patchy rain possible | 16° /7° | 0.5 mm | 3 | |
| 23 May | Partly cloudy | 16° /4° | 0 mm | 4 | |
| 24 May | Patchy rain possible | 16° /10° | 0.8 mm | 3 | |
| 25 May | Sunny | 15° /5° | 1.2 mm | 4 | |
| 26 May | Mist | 20° /5° | 0 mm | 5 | |
| 27 May | Sunny | 21° /7° | 1.5 mm | 5 | |
| 28 May |  Cloudy | 18° /9° | 2 mm | 4 | |
| 29 May | Sunny | 18° /8° | 7 mm | 5 | |
| 30 May | Partly cloudy | 21° /8° | 0 mm | 5 | |
| 31 May | Partly cloudy | 19° /8° | 2.8 mm | 5 | |
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Important Notice
Our weather forecast for Simcoe 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 Simcoe County forecast closer to your planned date for the most up-to-date weather information.
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Simcoe County in May - FAQ
What are the expected maximum and minimum temperatures in Simcoe County during May?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Simcoe County during May?
Significant rainfall exceeding 134.8 mm is expected in Simcoe County during May, occurring over more than 19 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Simcoe County during May?
The average wind speed in Simcoe County during May is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Simcoe County
Explore the daily rainfall trends and prepare for Simcoe Countys May weather 💧
Typically, Simcoe County has 19 rainy days in May with a total of 134.8 mm of rainfall.
UV exposure in Simcoe County during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Where is Simcoe County?Get accurate weather forecasts for Simcoe County, located at latitude 44.15 and longitude -79.866. Stay updated with localized weather information tailored for Simcoe County.
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