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
Jackson's average high-temperature decreases in September, falling from an agreeable 72.1°F (22.3°C) in August to a comfortable 62.8°F (17.1°C). Jackson measures a considerable dip from daytime highs with an average low-temperature of 37.2°F (2.9°C) during September.Humidity
In Jackson, the average relative humidity in September is 57%.Rainfall
In Jackson, during September, the rain falls for 10.8 days and regularly aggregates up to 1.77" (45mm) of precipitation. Throughout the year, there are 103 rainfall days, and 29.84" (758mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through December. In Jackson, during September, snow falls for 3.3 days and regularly aggregates up to 5.12" (130mm) of snow. In Jackson, during the entire year, snow falls for 173.6 days and aggregates up to 181.26" (4604mm) of snow.Daylight
In September, the average length of the day is 12h and 29min.On the first day of the month, sunrise is at 6:47 am and sunset at 7:57 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:05 pm MDT.
Sunshine
The average sunshine in September is 10h.UV index
In September, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index, 2 in September, converts into the following recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How much does it rain in September?
How many days does it snow in September?
How many hours of daylight does Jackson have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
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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