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 arrival of September corresponds with a temperature reduction, down from August's moderately hot 80.8°F (27.1°C) to a pleasant 71.6°F (22°C). Nightly temperatures drop to an average low of 50.9°F (10.5°C) in September.Humidity
In September, the average relative humidity is 38%.Rainfall
In September, the rain falls for 6.9 days. Throughout September, 0.51" (13mm) of precipitation is accumulated. In Alcova, during the entire year, the rain falls for 84.4 days and collects up to 8.78" (223mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. In Alcova, during the entire year, snow falls for 58.3 days and aggregates up to 29.33" (745mm) of snow.Daylight
In Alcova, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:32 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:49 pm MDT.
Sunshine
In Alcova, the average sunshine in September is 11h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A typical high UV index of 4 in September suggests the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. The Sun's radiation is especially intense around midday; try to stay in shade during this period. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Heed this! Snow reflection can almost augment the UV radiation of the sun by 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 many days does it rain in September?
When does it start snowing?
How many hours of daylight does Alcova have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Alcova, WY
- Average high temperature in September: 71.6°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (27.1°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (59.2°F).
The coldest months (with the lowest average low temperature) are January and December (13.5°F).
Average pressure in September
Alcova, WY
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Alcova, WY
- Average wind speed in September: 9.6mph
The windiest months (with the highest average wind speed) are January and November (11.1mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity in September
Alcova, WY
- Average humidity in September: 38%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (35%).
Average rainfall in September
Alcova, WY
- Average rainfall in September: 0.51"
The wettest month (with the highest rainfall) is May (1.34").
The driest month (with the least rainfall) is August (0.35").
Average rainfall days in September
Alcova, WY
- Average rainfall days in September: 6.9 days
The month with the highest number of rainy days is May (12.4 days).
The month with the least rainy days is January (3.7 days).
Average snowfall in September
Alcova, WY
- Average snowfall in September: 0.04"
The month with the highest snowfall is December (4.65").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Alcova, WY
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is February (10.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Alcova, 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: 11h and 0min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 6min).
Average sunshine days in September
Alcova, WY
- Average sunshine days in September: 19.9 days
The month with the most sunshine days is January (20.9 days).
The month with the least sunshine days is April (13.3 days).
Average UV index in September
Alcova, WY
- Average UV index in September: 4
The months with the highest UV index are July and August (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
Alcova, WY
- Average cloud cover in September: 14
The month with the most cloud cover is February (Cloud cover 37).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in September
Alcova, 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).
Alcova, Wyoming, USA
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