Thornton Weather in September

Thornton in September averages 27°C (81°F) during the day and 10°C (50°F) at night. Some rainfall is typical for this time of year.

Rainfall in Thornton in September

You can expect rain on around 6 days based on historical patterns, with 40 mm (1.6 in) average for the month. The odd shower may pass through, but it usually doesn't amount to much. A largely dry month overall.

Temperature in Thornton in September

Thornton in September has perfect weather. Days reach 27°C (81°F) and nights cool to 10°C (50°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights drop to 10°C (50°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Thornton in September

Enjoy a sunny month with about 270 hours of sunshine, the clear skies make Thornton even more beautiful.

Wind Speed in Thornton in September

September sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.

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 the United States of America, check out our Thornton's climate page.

Thornton Temperature in September

Min Temperature 10°C (50°F)  

Max Temperature 27°C (81°F)  

Chance of Rain 21%  

Precipitation 40 mm (1.6 in)  

Rainy days 6 days  

Humidity 50% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 270 hours *  

Percentage Sunshine 73% *  

* Data from: Denver, the United States of America (15 KM, 9 Miles).

What to Wear in Thornton in September

Warm but pleasant conditions in Thornton in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Wet weather is likely, so pack waterproof gear for multiple rainy days. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Thornton in September

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

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

5/10

Outdoor sports

8/10

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 the United States of America, check out our Thornton's climate page.

More climate data for Thornton

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Thornton climate overview or explore weather in the United States of America.