September weather forecast
Crested Butte, CO

Scenic wooden holiday homes amid trees and great scenery in a village in Crested Butte, Colorado, a view of the snowy Mount Butte in the back
Scenic wooden holiday homes amid trees and great scenery in a village in Crested Butte, Colorado, a view of the snowy Mount Butte in the back

Weather in September

September, the first month of the autumn in Crested Butte, is still a mild month, with temperature in the range of an average low of 34.2°F (1.2°C) and an average high of 58.8°F (14.9°C).

Temperature

In Crested Butte, the average high-temperature in September marginally drops from an enjoyable 64.6°F (18.1°C) in August to a moderate 58.8°F (14.9°C). The average low-temperature, in September, is 34.2°F (1.2°C).

Humidity

In Crested Butte, Colorado, the average relative humidity in September is 61%.

Rainfall

In Crested Butte, in September, it is raining for 13.5 days, with typically 1.81" (46mm) of accumulated precipitation. Throughout the year, there are 117.4 rainfall days, and 29.33" (745mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Crested Butte are January through December. In September, it is snowing for 4.5 days. Throughout September, 1.89" (48mm) of snow is accumulated. Throughout the year, in Crested Butte, Colorado, there are 159 snowfall days, and 149.53" (3798mm) of snow is accumulated.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:37 am and sunset at 7:38 pm. On the last day of September, in Crested Butte, Colorado, sunrise is at 7:03 am and sunset at 6:52 pm MDT.

Sunshine

The average sunshine in September in Crested Butte, Colorado, is 10.7h.

UV index

In September, the average daily maximum UV index in Crested Butte is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The average daily UV index of 2 in September transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in September in Crested Butte?

The average relative humidity in September in Crested Butte is 61%.

How much does it rain in Crested Butte in September?

In Crested Butte, Colorado, in September, it is raining for 13.5 days, with typically 1.81" (46mm) of accumulated precipitation.

How many days does it snow in September in Crested Butte?

In Crested Butte, in September, snow falls for 4.5 days, with typically accumulated 1.89" (48mm) of snow.

How many hours of daylight does Crested Butte have in September?

In September, the average day length is 12h and 26min.

What time are sunrise and sunset in September in Crested Butte?

In September, on the first day of the month, sunrise is at 6:37 am and sunset at 7:38 pm. On the last day of the month, in Crested Butte, Colorado, sunrise is at 7:03 am and sunset at 6:52 pm MDT.

How long on average sun shines in September in Crested Butte?

The average sunshine duration in September in Crested Butte is 10.7h.

How high is the UV index in September in Crested Butte?

In Crested Butte, the average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to Sun's UV rays.

Average temperature in September
Crested Butte, CO

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).

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Average pressure in September
Crested Butte, CO

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).

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Average wind speed in September
Crested Butte, CO

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).

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Average humidity in September
Crested Butte, CO

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%).

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Average rainfall in September
Crested Butte, CO

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").

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Average rainfall days in September
Crested Butte, CO

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).

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Average snowfall in September
Crested Butte, CO

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").

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Average snowfall days in September
Crested Butte, CO

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).

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Average daylight in September /
Average sunshine in September
Crested Butte, CO

Average daylight in September / Average sunshine in September - Crested Butte, CO
  • Average daylight in September: 12h and 26min

The month with the longest days is June (Average daylight: 14h and 51min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 10.7h

The month with the most sunshine is June (Average sunshine: 11.6h).
The month with the least sunshine is February (Average sunshine: 5.1h).

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Average sunshine days in September
Crested Butte, CO

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).

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Average UV index in September
Crested Butte, CO

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).

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Average cloud cover in September
Crested Butte, CO

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).

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Average visibility in September
Crested Butte, CO

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).

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