September weather forecastWyarno, WY
September
Weather in September
September, the first month of the autumn in Wyarno, is still a pleasant month, with an average temperature ranging between min 48.7°F (9.3°C) and max 68.7°F (20.4°C).Temperature
With September's onset, the weather reveals a slight temperature decrease, transitioning from a warm 77.4°F (25.2°C) in August to an agreeable 68.7°F (20.4°C). Throughout the month of September, Wyarno witnesses an average low-temperature of 48.7°F (9.3°C).Humidity
The average relative humidity in September in Wyarno, Wyoming, is 48%.Rainfall
In September, the rain falls for 12.5 days. Throughout September, 1.42" (36mm) of precipitation is accumulated. In Wyarno, Wyoming, during the entire year, the rain falls for 165.2 days and collects up to 21.22" (539mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows in Wyarno. Throughout September, in the average 0.3 snowfall days, it receives 0.35" (9mm) of snow. In Wyarno, during the entire year, snow falls for 78.9 days and aggregates up to 46.3" (1176mm) of snow.Daylight
The average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:04 am and sunset at 6:48 pm MDT.
Sunshine
The average sunshine in September is 10.8h.UV index
In September, the average daily maximum UV index in Wyarno is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average maximum UV index of 4 in September leads to these recommendations:
Heed the precautions - It is counselled to guard against solar damage. The Sun's radiation is especially intense around midday; try to stay in shade during this period. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Wyarno, WY
- Average high temperature in September: 68.7°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is February (29.1°F).
- Average low temperature in September: 48.7°F
The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is February (14.4°F).
Average pressure in September
Wyarno, WY
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Wyarno, WY
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in September
Wyarno, WY
- Average humidity in September: 48%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is August (46%).
Average rainfall in September
Wyarno, WY
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is May (3.43").
The driest month (with the least rainfall) is December (0.75").
Average rainfall days in September
Wyarno, WY
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (22.3 days).
The month with the least rainy days is November (7.5 days).
Average snowfall in September
Wyarno, WY
- Average snowfall in September: 0.35"
The month with the highest snowfall is April (8.7").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Wyarno, WY
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is February (15.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Wyarno, 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 48min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 6min).
Average sunshine days in September
Wyarno, WY
- Average sunshine days in September: 13.6 days
The month with the most sunshine days is November (15.2 days).
The month with the least sunshine days is May (5.8 days).
Average UV index in September
Wyarno, 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
Wyarno, WY
- Average cloud cover in September: 18
The months with the most cloud cover are February and April (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in September
Wyarno, 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).
