September weather forecastRed Cliff, CO
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Red Cliff, Colorado, with an average temperature ranging between max 61.7°F (16.5°C) and min 34.3°F (1.3°C).Temperature
The transition into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from a refreshing 67.6°F (19.8°C) in August to a still enjoyable 61.7°F (16.5°C). In September, Red Cliff endures a notable temperature shift from day to night, with lows averaging at a cold 34.3°F (1.3°C).Humidity
The average relative humidity in September is 56%.Rainfall
The month with the least rainfall is September, when the rain falls for 6.3 days and typically collects 0.31" (8mm) of precipitation.Snowfall
January through December are months with snowfall. In Red Cliff, in September, during 2 snowfall days, 0.31" (8mm) of snow is typically accumulated. Throughout the year, there are 98.6 snowfall days, and 43.82" (1113mm) 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 6:34 am and sunset at 7:35 pm. On the last day of September, sunrise is at 7:01 am and sunset at 6:48 pm MDT.
Sunshine
The average sunshine in September in Red Cliff, Colorado, is 11.1h.UV index
In Red Cliff, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index, 3 during September, leads to the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Around midday, solar radiation is most harmful; hence, exposure should be limited. 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. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Red Cliff, CO
- Average high temperature in September: 61.7°F
The warmest month (with the highest average high temperature) is July (69.4°F).
The month with the lowest average high temperature is January (23.4°F).
- Average low temperature in September: 34.3°F
The month with the highest average low temperature is July (41.5°F).
The coldest month (with the lowest average low temperature) is January (0.7°F).
Average pressure in September
Red Cliff, CO
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The months with the lowest atmospheric pressure are April and May (29.94"Hg).
Average wind speed in September
Red Cliff, CO
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is June (6.4mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Red Cliff, CO
- Average humidity in September: 56%
The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is June (51%).
Average rainfall in September
Red Cliff, CO
- Average rainfall in September: 0.31"
The wettest month (with the highest rainfall) is May (1.38").
The driest month (with the least rainfall) is September (0.31").
Average rainfall days in September
Red Cliff, CO
- Average rainfall days in September: 6.3 days
The month with the highest number of rainy days is July (10.1 days).
The month with the least rainy days is November (2.7 days).
Average snowfall in September
Red Cliff, CO
- Average snowfall in September: 0.31"
The month with the highest snowfall is May (7.64").
The months with the least snowfall are July and August (0.04").
Average snowfall days in September
Red Cliff, CO
- Average snowfall days in September: 2 days
The month with the highest number of snowfall days is April (14.2 days).
The month with the least snowfall days is July (0.2 days).
Average daylight in September /
Average sunshine in September
Red Cliff, 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 24min).
- Average sunshine in September: 11h and 6min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).
Average sunshine days in September
Red Cliff, CO
- Average sunshine days in September: 20.8 days
The month with the most sunshine days is November (22.3 days).
The month with the least sunshine days is May (12.9 days).
Average UV index in September
Red Cliff, CO
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 4).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Red Cliff, CO
- Average cloud cover in September: 16
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 15).
Average visibility in September
Red Cliff, CO
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).
