Denver weather in September
September in Denver averages 80°F by day and 48°F at night, with 1.5 inches of precipitation and 0.8 inches of snow. It is the 4th-warmest and 6th-wettest month of the year here.
- Average high
- 80°F-8° vs August
- Average low
- 48°F1 nights below freezing
- Precipitation
- 1.5 in3 days with 0.1 in. or more
- Snow
- 0.8 in4 days at 90°F+
Is September a good time to visit Denver?
Yes. September is one of the most comfortable months in Denver by our rule (highs of 62 to 86°F, lows of 42°F or more and under 4.5 inches of precipitation). The most comfortable months overall are May to June and September.
Get outside in Denver in September
September is made for being outside. Try Denver Zoo, Denver Botanic Gardens. All things to do in Denver.
On September 15 the sun rises at 6:41 am and sets at 7:08 pm, giving 12h 27m of daylight. Daylight all year.
What to pack for Denver in September
- Summer clothes, with a light layer for air conditioning
Based on 30-year averages, not a forecast. Check the forecast a few days before you go.
September nearby
| City | Distance | High | Low | Precip. |
|---|---|---|---|---|
| Denver | 80°F | 48°F | 1.5 in | |
| Westminster, CO | 7 mi | 80°F | 48°F | 1.5 in |
| Lakewood, CO | 8 mi | 80°F | 48°F | 1.5 in |
| Arvada, CO | 8 mi | 80°F | 48°F | 1.5 in |
| Thornton, CO | 9 mi | 80°F | 48°F | 1.5 in |
| Aurora, CO | 11 mi | 80°F | 48°F | 1.5 in |
| Centennial, CO | 12 mi | 77°F | 49°F | 1.3 in |
Frequently asked questions
What is the weather like in Denver in September?
In September, Denver averages a high of 80°F and a low of 48°F, with 1.5 inches of precipitation and 0.8 inches of snow (NOAA 1991-2020 normals).
Is September a good time to visit Denver?
Yes. September is one of Denver's most comfortable months by our rule: highs between 62°F and 86°F, lows of 42°F or more and modest rain.
Does it snow in Denver in September?
Yes. September averages 0.8 inches of snow.
Before and after: Denver in August and Denver in October. All twelve months: Denver weather by month.
NOAA NCEI 1991-2020 climate normals, station Denver-Stapleton, CO, 6.3 miles from the city center.