Colorado weather in September 2025
Colorado weather in September 2025
Day
19 °C
Night
1 °C
Precipitation
44 mm
in month
Rainy days
9 days
in month
Daylight
12 hours
average
Sunshine
9 hours
average
Humidity
49 %
Day
19 °C
Night
1 °C
Precipitation
44 mm
in month
Rainy days
9 days
in month
Daylight
12 hours
average
Sunshine
9 hours
average
Humidity
49 %
Overview: Colorado
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Destinations nearby and activities
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Activities in Colorado
🥾🏔️
Mountain hiking
in 8 places
🚶♂️🌳
Hiking
in 3 places
🧗♂️
Rock climbing
in 3 places
🚵♂️⛰️
Mountain biking
in 7 places
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Weather overview and FAQs
Weather overview
In Colorado in September, the average air temperature ranges from 19 °C (66 °F) during the day to 1 °C (34 °F) at night. There are 9 days of rain on average, where the rainfall is 44 mm (1.74 in).
Are there good conditions to visit in Colorado in September?
Colorado can be visited in September - the weather will be moderate. The night temperature of 1 °C (34 °F) is not inviting for evening and night activities except for visiting a bar and having beer or two.
What is the temperature in Colorado during the day in September?
In Colorado in September, the average daily temperatures will be 19 °C (66 °F). Nice temperature for walking around the city or on the beach, but you will probably get cold soon when wearing a swimsuit. When walking around all day, people used to cold conditions, pull out their shorts and get rid of their sweaters. On some days, when spending time in the direct sun, sunscreen can be useful, especially for people with more sensitive skin.
How heavy is the precipitation in September in Colorado?
There is precipitation of 44 mm (1.74 in) in September in Colorado, which means 2 mm (0.06 in) rainfall per day on average.
How long is the day (from dawn till dusk) in Colorado in September?
The length of daylight in Colorado in September is 12 hours.
How many rainy days can I expect in September in Colorado?
In September in Colorado, we can expect 9 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.2 days of the week, or in general - 31 % days.
How many hours of sun to expect in September in Colorado?
There is an average length of sunshine of 9 hours per day in September in Colorado.
Is September part of the wet season in Colorado?
No, there is no wet season in Colorado in September - you can expect 9 days of rain during the month.
Is the temperature rising or falling in the course of time in Colorado in September?
During September in Colorado, the day temperatures are decreasing - from 21 °C (70 °F) at the beginning of the month to 16 °C (61 °F) at the end of the month.
Is September part of the dry season in Colorado?
No, September is not a dry month in Colorado, expect rain approximately 9 days in a month.
Can I expect a freeze in Colorado in September?
It is possible that it will be freezing in September in Colorado, night temperatures will be 1 °C (34 °F) on average.
How windy is Colorado in September?
In Colorado in September, there will be an average wind scale of 3.
Is Colorado rainier in September than in October?
Yes, in Colorado in September it rains more than in October.
Is the weather in Colorado warmer in September than in August?
No, in Colorado in September the temperature is not higher than in August.
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