Denver Weather in September

September is one of the perfect months to visit Denver, with daytime temperatures of 26°C (79°F) and lows of 10°C (50°F) at night. Some rainfall is typical for this time of year.

Rainfall in Denver in September

Historically, September sees about 7 days of rain, with a monthly average of 53 mm (2.1 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 Denver in September

If you're visiting Denver in September, expect perfect temperatures with highs of 26°C (79°F) and overnight lows of 10°C (50°F). Overall, the month follows a fairly predictable daily temperature pattern. Nights fall to 10°C (50°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 Denver in September

The city usually sees around 270 hours of sunlight, indicating many sunny days — a great month for sightseeing.

Wind Speed in Denver in September

Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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 Denver's climate page.

Denver Temperature in September

Min Temperature 10°C (50°F)  

Max Temperature 26°C (79°F)  

Chance of Rain 23%  

Precipitation 53 mm (2.1 in)  

Rainy days 7 days  

Humidity 50%  

Windspeed 4 m/s (8 knots)  

Sunshine 270 hours  

Percentage Sunshine 73%  

What to Wear in Denver in September

Warm but pleasant conditions in Denver 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. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Denver 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

4/10

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 Denver's climate page.

More climate data for Denver

Temperature Rainfall Sunshine Humidity Wind Speed

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