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
The beginning of September involves a decrease in the average high-temperature, transitioning from a warm 79.5°F (26.4°C) in August to a pleasant 70.3°F (21.3°C). September nights see a notable contrast from daytime highs, with the nighttime temperature averaging at a chilly 48.6°F (9.2°C).Humidity
In September, the average relative humidity is 38%.Rainfall
In Sweetwater Station, in September, during 6.1 rainfall days, 0.47" (12mm) of precipitation is typically accumulated. In Sweetwater Station, during the entire year, the rain falls for 92.3 days and collects up to 9.92" (252mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.08" (2mm) of snow. In Sweetwater Station, during the entire year, snow falls for 56.6 days and aggregates up to 39.65" (1007mm) of snow.Daylight
In Sweetwater Station, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:38 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:55 pm MDT.
Sunshine
The average sunshine in September in Sweetwater Station is 10.9h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 4 during September translates into the following recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Sweetwater Station in September?
What is the average humidity in September in Sweetwater Station?
How many days does it rain in September?
When does it start snowing?
What is the average length of the day in September in Sweetwater Station?
When is the sunrise / sunset in September?
How many hours of sunshine does Sweetwater Station have in September?
What is the UV index intensity in September?
Average temperature in September
Sweetwater Station, WY
- Average high temperature in September: 70.3°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (28.4°F).
- Average low temperature in September: 48.6°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is December (13.1°F).
Average pressure in September
Sweetwater Station, 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 (29.89"Hg).
Average wind speed in September
Sweetwater Station, WY
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in September
Sweetwater Station, WY
- Average humidity in September: 38%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is August (34%).
Average rainfall in September
Sweetwater Station, WY
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is April (1.81").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in September
Sweetwater Station, WY
- Average rainfall days in September: 6.1 days
The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is November (4.8 days).
Average snowfall in September
Sweetwater Station, WY
- Average snowfall in September: 0.08"
The month with the highest snowfall is April (8.15").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Sweetwater Station, WY
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (10.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Sweetwater Station, WY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 10h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and February (Average sunshine: 6h and 54min).
Average sunshine days in September
Sweetwater Station, WY
- Average sunshine days in September: 21.6 days
The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is April (12.3 days).
Average UV index in September
Sweetwater Station, 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
Sweetwater Station, WY
- Average cloud cover in September: 13
The months with the most cloud cover are February and April (Cloud cover 28).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in September
Sweetwater Station, 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).
Sweetwater Station, Wyoming, USA
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