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Thornhill Weather in May
May in Thornhill brings pleasant temperatures, with highs of 18°C (64°F) and nights dropping to 8°C (46°F). Rainfall is on the higher side this month, averaging around 80 mm (3.1 in), so keep a rain jacket handy.
Rainfall in Thornhill in May
Historically, approximately 11 days this month are expected to have rain, averaging 80 mm (3.1 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Thornhill in May
May in Thornhill sees highs of 18°C (64°F) and lows of 8°C (46°F) overnight. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights fall to 8°C (46°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Thornhill in May
With approximately 227 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.If your ideal day consists of dry skies and pleasant temperatures, June, July, August and September typically offer the best circumstances for Thornhill.
Thornhill Temperature in May
Min Temperature
8°C (46°F)
Max Temperature
18°C (64°F)
Chance of Rain
36%
Precipitation
80 mm (3.1 in)
Rainy days
11 days
Humidity
76% *
Sunshine
227 hours *
Percentage Sunshine
50% *
* Data from: Toronto, Canada (16 KM, 10 Miles).
Thornhill Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Thornhill - 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 Thornhill 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. Rain gear is recommended, you can expect wet weather on multiple days. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Thornhill 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
Thornhill 3-Day Forecast
More climate data for Thornhill
Temperature Rainfall Sunshine Humidity
See the full Thornhill 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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