September weather forecastCollbran, CO
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Collbran, Colorado, with an average temperature fluctuating between 71.2°F (21.8°C) and 46.9°F (8.3°C).Temperature
In the transition to September, Collbran observes a minor drop in the average high-temperature, shifting from a warm 78.6°F (25.9°C) in August to a pleasant 71.2°F (21.8°C). In Collbran, following the steep rise of daytime temperatures, an average nighttime low of 46.9°F (8.3°C) is anticipated during September.Humidity
In September, the average relative humidity is 47%.Rainfall
In Collbran, in September, during 11.4 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. Throughout the year, in Collbran, there are 122.7 rainfall days, and 17.91" (455mm) of precipitation is accumulated.Snowfall
In Collbran, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:41 am and sunset at 7:42 pm. On the last day of September, in Collbran, sunrise is at 7:07 am and sunset at 6:55 pm MDT.
Sunshine
The average sunshine in September is 11h.UV index
In Collbran, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Collbran, CO
- Average high temperature in September: 71.2°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in September: 46.9°F
The month with the highest average low temperature is July (54.3°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in September
Collbran, CO
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is May (29.91"Hg).
Average wind speed in September
Collbran, CO
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in September
Collbran, CO
- Average humidity in September: 47%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is June (37%).
Average rainfall in September
Collbran, CO
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is March (2.09").
The driest month (with the least rainfall) is August (0.83").
Average rainfall days in September
Collbran, CO
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is April (15.5 days).
The month with the least rainy days is November (6.2 days).
Average snowfall in September
Collbran, CO
- Average snowfall in September: 0"
The month with the highest snowfall is January (12.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Collbran, CO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Collbran, CO
- Average daylight in September: 12h and 24min
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: 11h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 48min).
Average sunshine days in September
Collbran, CO
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is August (20.8 days).
The month with the least sunshine days is February (10.7 days).
Average UV index in September
Collbran, CO
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Collbran, CO
- Average cloud cover in September: 14
The month with the most cloud cover is February (Cloud cover 40).
The months with the least cloud cover are June and September (Cloud cover 14).
Average visibility in September
Collbran, CO
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
