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
Mount Crested Butte experiences a moderate temperature shift at the start of September, with average high-temperatures adjusting a bit from an enjoyable 64.6°F (18.1°C) in August to a moderate 58.8°F (14.9°C). Despite the significant gap from daytime peaks, Mount Crested Butte experiences an average low-temperature of 34.2°F (1.2°C) in September.Humidity
In Mount Crested Butte, the average relative humidity in September is 61%.Rainfall
In Mount Crested Butte, during September, the rain falls for 13.5 days and regularly aggregates up to 1.81" (46mm) of precipitation. In Mount 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 Mount Crested Butte are January through December. In Mount Crested Butte, in September, snow falls for 4.5 days, with typically accumulated 1.89" (48mm) of snow. Throughout the year, there are 159 snowfall days, and 149.53" (3798mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:37 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:51 pm MDT.
Sunshine
In September, the average sunshine is 10.7h.UV index
In September, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 2 during September translates into the following directions:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How many days does it rain in September?
How many days does it snow in September in Mount Crested Butte?
How many hours of daylight does Mount Crested Butte have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Mount 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
Mount 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
Mount 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
Mount 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
Mount 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
Mount 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
Mount 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
Mount 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
Mount Crested Butte, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
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
Mount 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
Mount 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
Mount 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
Mount 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).
Mount Crested Butte, Colorado, USA
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