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
September's onset brings a reduction in the average high-temperature, from an agreeable 72.1°F in August to a refreshing 62.8°F. During September, Jackson notes a substantial drop from the daytime peak to an average minimum temperature of 37.2°F.Humidity
In Jackson, Wyoming, the average relative humidity in September is 57%.Rainfall
In September, in Jackson, the rain falls for 10.8 days. Throughout September, 1.77" of precipitation is accumulated. In Jackson, during the entire year, the rain falls for 103 days and collects up to 29.84" of precipitation.Snowfall
Months with snowfall in Jackson, Wyoming, are January through December. In Jackson, in September, snow falls for 3.3 days, with typically accumulated 5.12" of snow. Throughout the year, in Jackson, there are 173.6 snowfall days, and 181.26" of snow is accumulated.Daylight
In Jackson, the average length of the day in September is 12h and 29min.On the first day of September in Jackson, Wyoming, sunrise is at 6:47 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:06 pm MDT.
Sunshine
In September, the average sunshine in Jackson is 10h.UV index
The average daily maximum UV index in September in Jackson is 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The daily maximum UV index of 2 in September interprets into the following advice:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
FAQ
What is the average September temperature in Jackson?
What is the average humidity in September in Jackson?
How many days does it rain in September in Jackson?
How many days does it snow in September in Jackson?
How many hours of daylight does Jackson have in September?
What time are sunrise and sunset in September in Jackson?
How many hours of sunshine does Jackson have in September?
What is the UV index reading in September in Jackson?
Average temperature in September
Jackson, WY
- Average high temperature in September: 62.8°F
The warmest month (with the highest average high temperature) is July (73.4°F).
The month with the lowest average high temperature is December (21.9°F).
- Average low temperature in September: 37.2°F
The month with the highest average low temperature is July (43.5°F).
The coldest month (with the lowest average low temperature) is January (4.8°F).
Average pressure in September
Jackson, WY
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Jackson, WY
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is June (5.7mph).
The calmest month (with the lowest average wind speed) is December (4.3mph).
Average humidity in September
Jackson, WY
- Average humidity in September: 57%
The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is August (50%).
Average rainfall in September
Jackson, WY
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is February (3.54").
The driest month (with the least rainfall) is August (1.34").
Average rainfall days in September
Jackson, WY
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (2.9 days).
Average snowfall in September
Jackson, WY
- Average snowfall in September: 5.12"
The month with the highest snowfall is February (29.33").
The month with the least snowfall is August (0.12").
Average snowfall days in September
Jackson, WY
- Average snowfall days in September: 3.3 days
The month with the highest number of snowfall days is March (24.8 days).
The month with the least snowfall days is July (0.4 days).
Average daylight in September /
Average sunshine in September
Jackson, WY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 10h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days in September
Jackson, WY
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is July (15.6 days).
The month with the least sunshine days is April (3.8 days).
Average UV index in September
Jackson, WY
- Average UV index in September: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).
Average cloud cover in September
Jackson, WY
- Average cloud cover in September: 21
The month with the most cloud cover is February (Cloud cover 72).
The months with the least cloud cover are July and August (Cloud cover 16).
Average visibility in September
Jackson, WY
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March and December (3mi).
Jackson, Wyoming, USA
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