Average temperatures, rainfall and packing tips for Denver, United States in September
🌡️ Avg high
29°C
🌙 Avg low
11°C
🌧️ Rainfall
~17 mm
📊 Warmth rank
#4 of 12
September in Denver at a glance
September in Denver is typically hot, with average daytime highs around 29°C and nights near 11°C. Temperature-wise it sits mid-range for Denver (the 4th warmest month).
Rainfall is light in September: roughly 17 mm across the whole month.
What to pack for Denver in September
Light, breathable clothing (cotton or linen)
Sun protection: hat, sunglasses and SPF
A refillable water bottle
Denver - year at a glance
HighLow · September highlighted
Is September a good time to visit Denver?
🧳 September is one of the most comfortable months to visit Denver - daytime temperatures sit in a pleasant range and it's a good pick for sightseeing and time outdoors.
In September, Denver averages a daytime high of about 29°C and a night-time low of around 11°C, based on recent historical data.
Does it rain in Denver in September?
Rainfall is light in September: roughly 17 mm across the whole month.
Is September a good time to visit Denver?
September is one of the most comfortable months to visit Denver - daytime temperatures sit in a pleasant range and it's a good pick for sightseeing and time outdoors.