Thornhill Weather in September

Thornhill in September sees high temperatures, with highs around 23°C (73°F) and overnight lows of 12°C (54°F). Rainfall is fairly high at around 79 mm (3.1 in) on average, so pack waterproofs just in case.

Rainfall in Thornhill in September

Historically, September sees about 10 days of rain, with a monthly average of 79 mm (3.1 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Thornhill in September

September is a good time to be in Thornhill. Days are perfect, reaching 23°C (73°F), with nights around 12°C (54°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. With overnight lows of 12°C (54°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Thornhill in September

Enjoy a sunny month with about 195 hours of sunshine, the clear skies make Thornhill even more beautiful.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Thornhill.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Canada, check out our Thornhill's climate page.

Thornhill Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 23°C (73°F)  

Chance of Rain 32%  

Precipitation 79 mm (3.1 in)  

Rainy days 10 days  

Humidity 87% *  

Sunshine 195 hours *  

Percentage Sunshine 52% *  

* Data from: Toronto, Canada (16 KM, 10 Miles).

What to Wear in Thornhill in September

Pleasant temperatures in September 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 September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Canada, check out our Thornhill's climate page.

More climate data for Thornhill

Temperature Rainfall Sunshine Humidity

See the full Thornhill climate overview or explore weather in Canada.