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 indicates a decrease in the average high-temperature, moving from a moderately hot 79.5°F (26.4°C) in August to a pleasant 70.5°F (21.4°C). Atlantic City, after an intense day, registers a significant cooling to an average low-temperature of 48.6°F (9.2°C) throughout September.Humidity
In September, the average relative humidity in Atlantic City is 38%.Rainfall
In Atlantic City, in September, it is raining for 5.8 days, with typically 0.75" (19mm) of accumulated precipitation. Throughout the year, there are 92 rainfall days, and 10.2" (259mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 1.54" (39mm) of snow. Throughout the year, there are 56.8 snowfall days, and 40.94" (1040mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:57 pm MDT.
Sunshine
The average sunshine in September is 10.8h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the UV index of 4 transforms into the following advice:
Undertake precautions - Obligation exists to protect against skin and eye damage. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September?
When does it start snowing?
What is the average length of the day in September in Atlantic City?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Atlantic City, WY
- Average high temperature in September: 70.5°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
Atlantic City, 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
Atlantic City, WY
- Average wind speed in September: 6.9mph
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
Atlantic City, 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
Atlantic City, WY
- Average rainfall in September: 0.75"
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
Atlantic City, WY
- Average rainfall days in September: 5.8 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
Atlantic City, WY
- Average snowfall in September: 1.54"
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
Atlantic City, WY
- Average snowfall days in September: 0.3 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
Atlantic City, WY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
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 month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in September
Atlantic City, WY
- Average sunshine days in September: 22 days
The month with the most sunshine days is September (22 days).
The month with the least sunshine days is April (12.3 days).
Average UV index in September
Atlantic City, 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
Atlantic City, 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
Atlantic City, 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).
Atlantic City, Wyoming, USA
Weather forecast for your location
2. Allow the app to use your location