Denver Weather in September
United States · 30-year monthly averages
🌟 Great time to visit
September in Denver is warm, with average daytime highs around 27°C (80°F) and nighttime lows near 9°C (48°F). Expect roughly 38mm of precipitation spread over about 5 rainy days, with little rainfall.
Avg high
27°C
80°F
Avg low
9°C
48°F
Rainfall
38mm
dry
Rainy days
5
days with ≥1mm
🎒 What to pack
- light summer clothing
- sunscreen and sunglasses
September vs the rest of the year
FAQ
- How hot is Denver in September?
- September in Denver is warm, with average daytime highs around 27°C (80°F) and nighttime lows near 9°C (48°F). Expect roughly 38mm of precipitation spread over about 5 rainy days, with little rainfall.
- Does it rain a lot in Denver in September?
- Denver sees around 38mm of precipitation in September on average — dry by global standards.
- Is September a good time to visit Denver?
- September is one of the best months to visit Denver — comfortable temperatures and manageable rainfall.