September weather forecastDevils Den, WY
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Devils Den, Wyoming, with temperature in the range of an average low of 36.1°F (2.3°C) and an average high of 59.9°F (15.5°C).Temperature
September's onset corresponds with a shift in the average high-temperature, moving from an agreeable 69.6°F (20.9°C) in August to a mild 59.9°F (15.5°C). A considerable shift from the daytime highs is observed in Devils Den during September nights, with an average low of 36.1°F (2.3°C).Humidity
The average relative humidity in September is 57%.Rainfall
In Devils Den, during September, the rain falls for 9 days and regularly aggregates up to 1.61" (41mm) of precipitation. Throughout the year, in Devils Den, there are 102.8 rainfall days, and 23.98" (609mm) of precipitation is accumulated.Snowfall
January through December are months with snowfall in Devils Den. In September, in Devils Den, it is snowing for 4.5 days. Throughout September, 5.55" (141mm) of snow is accumulated. Throughout the year, in Devils Den, Wyoming, there are 186.1 snowfall days, and 135.16" (3433mm) of snow is accumulated.Daylight
In Devils Den, the average length of the day in September is 12h and 31min.On the first day of September in Devils Den, sunrise is at 6:44 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:03 pm MDT.
Sunshine
In Devils Den, the average sunshine in September is 10.1h.UV index
In Devils Den, the average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 2 during September translates into these guidelines:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Devils Den, WY
- Average high temperature in September: 59.9°F
The warmest month (with the highest average high temperature) is July (70.9°F).
The month with the lowest average high temperature is December (18.9°F).
- Average low temperature in September: 36.1°F
The month with the highest average low temperature is July (43.2°F).
The coldest month (with the lowest average low temperature) is December (2.5°F).
Average pressure in September
Devils Den, WY
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Devils Den, WY
- Average wind speed in September: 6.5mph
The windiest months (with the highest average wind speed) are February and June (7.3mph).
The calmest month (with the lowest average wind speed) is May (6mph).
Average humidity in September
Devils Den, WY
- Average humidity in September: 57%
The months with the highest relative humidity are February and March (93%).
The months with the lowest relative humidity are July and August (51%).
Average rainfall in September
Devils Den, WY
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is July (1.02").
Average rainfall days in September
Devils Den, WY
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in September
Devils Den, WY
- Average snowfall in September: 5.55"
The month with the highest snowfall is April (19.69").
The month with the least snowfall is July (0.24").
Average snowfall days in September
Devils Den, WY
- Average snowfall days in September: 4.5 days
The month with the highest number of snowfall days is March (25.6 days).
The month with the least snowfall days is July (0.4 days).
Average daylight in September /
Average sunshine in September
Devils Den, WY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 10h and 6min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 3h and 36min).
Average sunshine days in September
Devils Den, WY
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is September (15.6 days).
The month with the least sunshine days is May (3.1 days).
Average UV index in September
Devils Den, WY
- Average UV index in September: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).
Average cloud cover in September
Devils Den, WY
- Average cloud cover in September: 21
The month with the most cloud cover is February (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in September
Devils Den, WY
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August and September (6mi).
The month with the lowest visibility is February (3mi).
