September weather forecastAntelope, WY
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Antelope, Wyoming, with an average temperature varying between 69.3°F (20.7°C) and 48.4°F (9.1°C).Temperature
The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a warm 77.7°F (25.4°C) in August to an agreeable 69.3°F (20.7°C). In the month of September, the nighttime temperature dips to a steady average of 48.4°F (9.1°C).Humidity
In September, the average relative humidity is 38%.Rainfall
In Antelope, in September, during 6.5 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. In Antelope, during the entire year, the rain falls for 78.2 days and collects up to 7.48" (190mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.7 snowfall days, it receives 0.51" (13mm) of snow. In Antelope, Wyoming, during the entire year, snow falls for 58.7 days and aggregates up to 24.72" (628mm) of snow.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:49 am and sunset at 7:54 pm. On the last day of September, sunrise is at 7:18 am and sunset at 7:04 pm MDT.
Sunshine
In September, the average sunshine is 10.4h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Undertake protective steps - Preventing sun damage is advised. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Antelope, WY
- Average high temperature in September: 69.3°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is December (26.6°F).
- Average low temperature in September: 48.4°F
The month with the highest average low temperature is July (55.9°F).
The coldest months (with the lowest average low temperature) are January and December (12°F).
Average pressure in September
Antelope, WY
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Antelope, WY
- Average wind speed in September: 9.2mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (8mph).
Average humidity in September
Antelope, WY
- Average humidity in September: 38%
The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are July and August (35%).
Average rainfall in September
Antelope, WY
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is May (1.18").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in September
Antelope, WY
- Average rainfall days in September: 6.5 days
The month with the highest number of rainy days is May (11.4 days).
The month with the least rainy days is November (3.5 days).
Average snowfall in September
Antelope, WY
- Average snowfall in September: 0.51"
The month with the highest snowfall is March (5.04").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Antelope, WY
- Average snowfall days in September: 0.7 days
The month with the highest number of snowfall days is February (10.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Antelope, WY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 10h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in September
Antelope, WY
- Average sunshine days in September: 19.3 days
The months with the most sunshine days are January and October (22.3 days).
The month with the least sunshine days is July (15.9 days).
Average UV index in September
Antelope, WY
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Antelope, WY
- Average cloud cover in September: 13
The month with the most cloud cover is February (Cloud cover 37).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in September
Antelope, WY
- 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).
