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 transition into September involves a decrease in the average high-temperature, falling from a warm 79.5°F (26.4°C) in August to an agreeable 70.3°F (21.3°C). Sweetwater Station's average nighttime temperature descends significantly from the day's peak in September, settling at a frosty 48.6°F (9.2°C).Humidity
In September, the average relative humidity is 38%.Rainfall
In Sweetwater Station, in September, it is raining for 6.1 days, with typically 0.47" (12mm) of accumulated precipitation. Throughout the year, there are 92.3 rainfall days, and 9.92" (252mm) of precipitation is accumulated.Snowfall
Months with snowfall in Sweetwater Station 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. Throughout the year, in Sweetwater Station, there are 56.6 snowfall days, and 39.65" (1007mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 6:38 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:55 pm MDT.
Sunshine
In September, the average sunshine is 10.9h.UV index
In Sweetwater Station, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: In September, the maximum UV index of 4 translates into these guidelines:
Put precautions into practice - Ensuring skin and eye safety is a necessity. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Frequently asked questions
What is the temperature in September in Sweetwater Station?
What is the average humidity in September in Sweetwater Station?
How much does it rain in Sweetwater Station in September?
When does it start snowing in Sweetwater Station?
What is the average length of the day in September in Sweetwater Station?
When are sunrise and sunset in September in Sweetwater Station?
How long on average sun shines in September in Sweetwater Station?
How high is the UV index in September in Sweetwater Station?
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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