September weather forecastCheyenne, OK
September
Weather in September
September, the first month of the autumn in Cheyenne, is still a warm month, with an average temperature ranging between min 65.5°F (18.6°C) and max 84.6°F (29.2°C).Temperature
September suggests a modest reduction in the average high-temperature, shifting from a tropical 94.1°F (34.5°C) in August to a moderately hot 84.6°F (29.2°C). Throughout September, the average low-temperature dips to an enjoyable 65.5°F (18.6°C).Heat index
In September, the heat index is calculated to be a hot 87.8°F (31°C). Constant activity during exposure could result in a state of weariness and possibly heat cramps.From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', evaluates the perceived heat by adding the effect of moisture in the air. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
In September, the average relative humidity is 59%.Rainfall
In Cheyenne, in September, it is raining for 11.6 days, with typically 2.05" (52mm) of accumulated precipitation. In Cheyenne, during the entire year, the rain falls for 98.4 days and collects up to 18.78" (477mm) of precipitation.Snowfall
In Cheyenne, snow does not fall in May through September.Daylight
In Cheyenne, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 7:11 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 7:23 pm CDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
In Cheyenne, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In September, a daily UV index of 5 turns into the following recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. The solar radiation around mid-day is intense; avoid the Sun and stay safe. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cheyenne, OK
- Average high temperature in September: 84.6°F
The warmest month (with the highest average high temperature) is July (94.8°F).
The month with the lowest average high temperature is December (49.3°F).
- Average low temperature in September: 65.5°F
The month with the highest average low temperature is July (73.8°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).
Average pressure in September
Cheyenne, OK
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Cheyenne, OK
- Average wind speed in September: 9.9mph
The windiest month (with the highest average wind speed) is April (13.1mph).
The calmest month (with the lowest average wind speed) is August (9.4mph).
Average humidity in September
Cheyenne, OK
- Average humidity in September: 59%
The month with the highest relative humidity is May (62%).
The month with the lowest relative humidity is August (51%).
Average rainfall in September
Cheyenne, OK
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is May (3.11").
The driest months (with the least rainfall) are January and February (0.67").
Average rainfall days in September
Cheyenne, OK
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is May (12.1 days).
The month with the least rainy days is January (2.9 days).
Average snowfall in September
Cheyenne, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Cheyenne, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Cheyenne, OK
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 8h and 54min
The months with the most sunshine are June and July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in September
Cheyenne, OK
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is January (26.4 days).
The month with the least sunshine days is August (15.1 days).
Average UV index in September
Cheyenne, OK
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Cheyenne, OK
- Average cloud cover in September: 24
The months with the most cloud cover are March and April (Cloud cover 30).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Cheyenne, OK
- 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).
