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Alliston Weather in May
In Alliston, May brings pleasant daytime temperatures around 20°C (68°F), with nights cooling to 7°C (45°F). Expect quite a bit of rainfall this month.
Rainfall in Alliston in May
You can typically expect 11 days of rain this month, averaging around 87 mm (3.4 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Alliston in May
May is one of the better months to visit Alliston. Expect 20°C (68°F) during the day and 7°C (45°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 7°C (45°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.
Sunshine in Alliston in May
The month enjoys around 230 hours of sunshine, creating mostly sunny days with good weather conditions.If you're inclined towards comfortable temperatures and drier conditions, May is a good time to visit Alliston.
Alliston Temperature in May
Min Temperature
7°C (45°F)
Max Temperature
20°C (68°F)
Chance of Rain
35%
Precipitation
87 mm (3.4 in)
Rainy days
11 days
Humidity
53% *
Sunshine
230 hours *
Percentage Sunshine
50% *
* Data from: Mississauga, Canada (65 KM, 40 Miles).
Alliston Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Alliston - and find the best time to visit.
Best Places in Canada in May
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in May →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Alliston in May
Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Alliston in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Camping4/10 -
Outdoor sports9/10
Alliston 3-Day Forecast
More climate data for Alliston
Temperature Rainfall Sunshine Humidity
See the full Alliston climate overview or explore weather in Canada.
Popular in May
Where to go in May - average daytime high across popular destinations.
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