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
A mild shift in the average high-temperature occurs in September in Sundance, reducing from a moderately hot 77.2°F (25.1°C) in August to a pleasant 68.5°F (20.3°C). During September, the average low-temperature in Sundance is a frosty 48°F (8.9°C).Humidity
August and September, with an average relative humidity of 53%, are the least humid months.Rainfall
In Sundance, during September, the rain falls for 10 days and regularly aggregates up to 1.26" (32mm) of precipitation. Throughout the year, in Sundance, there are 123.2 rainfall days, and 19.37" (492mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall in Sundance. September is the first month it typically snows. Throughout September, in the average 0.8 snowfall days, it receives 0.94" (24mm) of snow. In Sundance, during the entire year, snow falls for 80.3 days and aggregates up to 41.73" (1060mm) of snow.Daylight
In Sundance, the average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:21 am and sunset at 7:33 pm. On the last day of September, in Sundance, sunrise is at 6:55 am and sunset at 6:39 pm MDT.
Sunshine
In Sundance, the average sunshine in September is 10.4h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 4 during September translates into the following directions:
Take necessary precautions - Protection from skin and eye injury is mandatory. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Sundance?
What are the least humid months in Sundance?
What is the average humidity in September in Sundance?
How many days does it rain in September in Sundance?
When does it start to snow in Sundance?
What is the average length of the day in September in Sundance?
What time are sunrise and sunset in September in Sundance?
How long on average sun shines in September in Sundance?
What is the UV index intensity in September in Sundance?
Average temperature in September
Sundance, WY
- Average high temperature in September: 68.5°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is December (26.2°F).
- Average low temperature in September: 48°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is February (10.8°F).
Average pressure in September
Sundance, WY
- Average pressure in September: 29.93"Hg
The months with the highest atmospheric pressure are January and December (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Sundance, WY
- Average wind speed in September: 8.6mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).
Average humidity in September
Sundance, WY
- Average humidity in September: 53%
The month with the highest relative humidity is February (84%).
The months with the lowest relative humidity are August and September (53%).
Average rainfall in September
Sundance, WY
- Average rainfall in September: 1.26"
The wettest months (with the highest rainfall) are June and July (2.68").
The driest month (with the least rainfall) is December (0.67").
Average rainfall days in September
Sundance, WY
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in September
Sundance, WY
- Average snowfall in September: 0.94"
The month with the highest snowfall is April (8.82").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Sundance, WY
- Average snowfall days in September: 0.8 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Sundance, WY
- Average daylight in September: 12h and 3min
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 2min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).
Average sunshine days in September
Sundance, WY
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (9.7 days).
Average UV index in September
Sundance, WY
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Sundance, WY
- Average cloud cover in September: 18
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Sundance, WY
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Sundance, Wyoming, USA
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