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
During the shift to September, Crested Butte records a mild decrease in average high-temperature, moving from a comfortable 64.6°F (18.1°C) in August to a still refreshing 58.8°F (14.9°C). With a significant daily temperature differential, Crested Butte's nighttime temperature in September falls to an average of 34.2°F (1.2°C).Humidity
In Crested Butte, the average relative humidity in September is 61%.Rainfall
In September, 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
January through December are months with snowfall. In September, it is snowing for 4.5 days. Throughout September, 1.89" (48mm) of snow is 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 in Crested Butte, 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 Crested Butte, the average sunshine in September is 10.7h.UV index
The average daily maximum UV index in September is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: In September, the UV index of 2 transforms into the following advice:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
How much does it snow in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
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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