Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The start of September involves a subtle temperature drop, shifting from an enjoyable 64.6°F (18.1°C) in August to a mild 58.8°F (14.9°C). Crested Butte's temperature in September declines substantially from daytime highs, settling at a consistent average of 34.2°F (1.2°C) during the nights.Humidity
The average relative humidity in September is 61%.Rainfall
In September, in Crested Butte, the rain falls for 13.5 days. Throughout September, 1.81" (46mm) of precipitation is accumulated. In Crested Butte, during the entire year, the rain falls for 117.4 days and collects up to 29.33" (745mm) of precipitation.Snowfall
Months with snowfall in Crested Butte, Colorado, are January through December. In Crested Butte, in September, during 4.5 snowfall days, 1.89" (48mm) of snow is typically accumulated. Throughout the year, there are 159 snowfall days, and 149.53" (3798mm) of snow is accumulated.Daylight
In Crested Butte, the average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:37 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:51 pm MDT.
Sunshine
In September, the average sunshine in Crested Butte is 10.7h.UV index
In Crested Butte, the average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: In September, a regular UV index of 2 translates into these guidelines:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Experience reduced UV exposure by about half when donning a wide-brim hat. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Frequently asked questions
What are the temperatures in Crested Butte in September?
What is the average humidity in September in Crested Butte?
How many days does it rain in September in Crested Butte?
How many days does it snow in September in Crested Butte?
How many hours of daylight does Crested Butte have in September?
When are sunrise and sunset in September in Crested Butte?
How long on average sun shines in September in Crested Butte?
What is the UV index intensity in September in Crested Butte?
Average temperature in September
Crested Butte, CO
- Average high temperature in September: 58.8°F
The warmest month (with the highest average high temperature) is July (67.6°F).
The months with the lowest average high temperature are February and December (22.6°F).
- Average low temperature in September: 34.2°F
The month with the highest average low temperature is July (41°F).
The coldest month (with the lowest average low temperature) is January (0°F).
Average pressure in September
Crested Butte, CO
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The months with the lowest atmospheric pressure are April and May (29.95"Hg).
Average wind speed in September
Crested Butte, CO
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is June (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in September
Crested Butte, CO
- Average humidity in September: 61%
The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is June (52%).
Average rainfall in September
Crested Butte, CO
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is July (3.74").
The driest month (with the least rainfall) is November (1.61").
Average rainfall days in September
Crested Butte, CO
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (22.3 days).
The month with the least rainy days is November (3.1 days).
Average snowfall in September
Crested Butte, CO
- Average snowfall in September: 1.89"
The month with the highest snowfall is March (23.94").
The month with the least snowfall is July (0.16").
Average snowfall days in September
Crested Butte, CO
- Average snowfall days in September: 4.5 days
The month with the highest number of snowfall days is April (21.8 days).
The month with the least snowfall days is July (0.7 days).
Average daylight in September /
Average sunshine in September
Crested Butte, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 10h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in September
Crested Butte, CO
- Average sunshine days in September: 11.8 days
The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is April (5.3 days).
Average UV index in September
Crested Butte, CO
- Average UV index in September: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are February, March and December (UV index 1).
Average cloud cover in September
Crested Butte, CO
- Average cloud cover in September: 19
The month with the most cloud cover is February (Cloud cover 55).
The month with the least cloud cover is June (Cloud cover 17).
Average visibility in September
Crested Butte, CO
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).
Crested Butte, Colorado, USA
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