Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September is characterized by a slight reduction in average high-temperature, easing from 85.6°F (29.8°C) in August to a still moderately hot 77.2°F (25.1°C). Contrasting the daytime warmth, Dwyer's September nights cool down to an average of 54.3°F (12.4°C).Humidity
In Dwyer, the average relative humidity in September is 40%.Rainfall
In September, the rain falls for 7.4 days. Throughout September, 0.75" (19mm) of precipitation is accumulated. Throughout the year, there are 90.8 rainfall days, and 11.57" (294mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.94" (24mm) of snow. In Dwyer, during the entire year, snow falls for 46.4 days and aggregates up to 27.13" (689mm) of snow.Daylight
The average length of the day in September in Dwyer is 12h and 28min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:33 pm. On the last day of September, sunrise is at 6:56 am and sunset at 6:42 pm MDT.
Sunshine
The average sunshine in September is 10.6h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 5 during September translates into these guidelines:
Take necessary precautions - Protection from skin and eye injury is mandatory. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How much does it rain in September?
When does it start snowing?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September in Dwyer?
Average temperature in September
Dwyer, WY
- Average high temperature in September: 77.2°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is December (35.1°F).
- Average low temperature in September: 54.3°F
The month with the highest average low temperature is July (62.8°F).
The coldest months (with the lowest average low temperature) are February and December (21.6°F).
Average pressure in September
Dwyer, WY
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Dwyer, WY
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is January (15mph).
The calmest month (with the lowest average wind speed) is August (8.6mph).
Average humidity in September
Dwyer, WY
- Average humidity in September: 40%
The month with the highest relative humidity is February (66%).
The month with the lowest relative humidity is August (39%).
Average rainfall in September
Dwyer, WY
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in September
Dwyer, WY
- Average rainfall days in September: 7.4 days
The month with the highest number of rainy days is May (12.7 days).
The month with the least rainy days is January (3.6 days).
Average snowfall in September
Dwyer, WY
- Average snowfall in September: 0.94"
The month with the highest snowfall is April (4.45").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Dwyer, WY
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Dwyer, WY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 10h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are February and December (Average sunshine: 6h and 36min).
Average sunshine days in September
Dwyer, WY
- Average sunshine days in September: 20.1 days
The month with the most sunshine days is January (21.9 days).
The month with the least sunshine days is April (14.5 days).
Average UV index in September
Dwyer, WY
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Dwyer, WY
- Average cloud cover in September: 16
The month with the most cloud cover is April (Cloud cover 31).
The months with the least cloud cover are August and September (Cloud cover 16).
Average visibility in September
Dwyer, 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).
Dwyer, Wyoming, USA
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