September weather forecastSinclair, WY
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Sinclair, Wyoming, with an average temperature ranging between max 70.2°F (21.2°C) and min 49.6°F (9.8°C).Temperature
In Sinclair, the average high-temperature in September slightly decreases from a moderately hot 79°F (26.1°C) in August to an agreeable 70.2°F (21.2°C). During September, Sinclair witnesses a consistent average low-temperature of 49.6°F (9.8°C).Humidity
In September, the average relative humidity is 38%.Rainfall
In September, the rain falls for 7 days. Throughout September, 0.47" (12mm) of precipitation is accumulated. Throughout the year, there are 81.7 rainfall days, and 9.72" (247mm) of precipitation is accumulated.Snowfall
In Sinclair, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:05 am and sunset at 6:51 pm MDT.
Sunshine
The average sunshine in September in Sinclair is 11.1h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 4 during September translates into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. It's recommended to limit sun exposure when its radiation is at its peak during midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sinclair, WY
- Average high temperature in September: 70.2°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is December (26.4°F).
- Average low temperature in September: 49.6°F
The month with the highest average low temperature is July (57.9°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure in September
Sinclair, WY
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Sinclair, WY
- Average wind speed in September: 10.6mph
The windiest month (with the highest average wind speed) is November (13.2mph).
The calmest months (with the lowest average wind speed) are July and August (9.5mph).
Average humidity in September
Sinclair, 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
Sinclair, WY
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is April (1.42").
The driest month (with the least rainfall) is August (0.35").
Average rainfall days in September
Sinclair, WY
- Average rainfall days in September: 7 days
The month with the highest number of rainy days is May (11.7 days).
The month with the least rainy days is November (3.2 days).
Average snowfall in September
Sinclair, WY
- Average snowfall in September: 0"
The month with the highest snowfall is April (5.75").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Sinclair, WY
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is February (14.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Sinclair, WY
- Average daylight in September: 12h and 30min
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: 11h and 6min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days in September
Sinclair, WY
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is June (21.1 days).
The month with the least sunshine days is February (11.2 days).
Average UV index in September
Sinclair, 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
Sinclair, WY
- Average cloud cover in September: 13
The month with the most cloud cover is February (Cloud cover 45).
The months with the least cloud cover are August and September (Cloud cover 13).
Average visibility in September
Sinclair, 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).
