September weather forecastRollinsville, CO
September
Weather in September
September, the first month of the autumn in Rollinsville, is also an enjoyable month, with temperature in the range of an average low of 43°F (6.1°C) and an average high of 66.4°F (19.1°C).Temperature
With the onset of September, Rollinsville's average high-temperature slightly adjusts, moderately receding from August's agreeable 73°F (22.8°C) to an enjoyable 66.4°F (19.1°C). Rollinsville registers a substantial downturn from daytime peaks throughout September nights, with an average low-temperature of 43°F (6.1°C).Humidity
The average relative humidity in September in Rollinsville is 49%.Rainfall
In Rollinsville, Colorado, in September, it is raining for 12 days, with typically 1.5" (38mm) of accumulated precipitation. In Rollinsville, Colorado, during the entire year, the rain falls for 112.5 days and collects up to 21.65" (550mm) of precipitation.Snowfall
Months with snowfall are January through June, August through December. In Rollinsville, during September, snow falls for 1.8 days and regularly aggregates up to 0.91" (23mm) of snow. Throughout the year, there are 94.8 snowfall days, and 86.42" (2195mm) of snow is accumulated.Daylight
The average length of the day in September in Rollinsville is 12h and 26min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:32 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:45 pm MDT.
Sunshine
In Rollinsville, the average sunshine in September is 10.6h.UV index
In Rollinsville, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index, 3 in September, converts into the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rollinsville, CO
- Average high temperature in September: 66.4°F
The warmest month (with the highest average high temperature) is July (73.9°F).
The month with the lowest average high temperature is December (30°F).
- Average low temperature in September: 43°F
The month with the highest average low temperature is July (49.6°F).
The coldest month (with the lowest average low temperature) is February (13.5°F).
Average pressure in September
Rollinsville, CO
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is April (29.92"Hg).
Average wind speed in September
Rollinsville, CO
- Average wind speed in September: 6.1mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.9mph).
Average humidity in September
Rollinsville, CO
- Average humidity in September: 49%
The month with the highest relative humidity is February (76%).
The month with the lowest relative humidity is June (48%).
Average rainfall in September
Rollinsville, CO
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is May (3.7").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in September
Rollinsville, CO
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is November (2.6 days).
Average snowfall in September
Rollinsville, CO
- Average snowfall in September: 0.91"
The month with the highest snowfall is April (16.54").
The month with the least snowfall is July (0").
Average snowfall days in September
Rollinsville, CO
- Average snowfall days in September: 1.8 days
The month with the highest number of snowfall days is March (14.5 days).
The month with the least snowfall days is July (0 days).
Average daylight in September /
Average sunshine in September
Rollinsville, CO
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 10h and 36min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 18min).
The month with the least sunshine is February (Average sunshine: 6h and 6min).
Average sunshine days in September
Rollinsville, CO
- Average sunshine days in September: 15 days
The month with the most sunshine days is November (20.3 days).
The month with the least sunshine days is July (9 days).
Average UV index in September
Rollinsville, CO
- Average UV index in September: 3
The month with the highest UV index is August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Rollinsville, CO
- Average cloud cover in September: 21
The month with the most cloud cover is May (Cloud cover 36).
The month with the least cloud cover is June (Cloud cover 20).
Average visibility in September
Rollinsville, CO
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
