September weather forecastPearl City, IL
September
Weather in September
Come September, the beautiful city of Pearl City witnesses the emergence of Autumn. Temperatures slide down from August, marking the onset of cooler days and colder nights. A dip in humidity levels and repair in visibility suggest clear and crisp autumn weather. The verdant green of summer starts giving way to various hues of red, orange, and yellow. September captures the transformation of Pearl City as it gracefully transitions into the fall season.Temperature
September signifies a minor drop in average high-temperature, transitioning from a moderately hot 78.1°F (25.6°C) in August to an agreeable 72.5°F (22.5°C). Pearl City in September anticipates an average nighttime temperature of 53.4°F (11.9°C).Humidity
The average relative humidity in September in Pearl City is 80%.Rainfall
In Pearl City, in September, during 11.6 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. Throughout the year, there are 145.9 rainfall days, and 22.8" (579mm) of precipitation is accumulated.Snowfall
In Pearl City, snow does not fall in May through September.Daylight
In Pearl City, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:25 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:41 pm CDT.
Sunshine
In September, the average sunshine in Pearl City is 8.9h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 4 during September translates into the following directions:
Prioritize safety - Recommendations to avert sunburn are shared. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Pearl City, IL
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (24.8°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (12.9°F).
Average pressure in September
Pearl City, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Pearl City, IL
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Pearl City, IL
- Average humidity in September: 80%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (76%).
Average rainfall in September
Pearl City, IL
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in September
Pearl City, IL
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is May (18.3 days).
The months with the least rainy days are January and February (5.3 days).
Average snowfall in September
Pearl City, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.46").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Pearl City, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Pearl City, IL
- Average daylight in September: 12h and 30min
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 12min).
- Average sunshine in September: 8h and 54min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Pearl City, IL
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (9.3 days).
Average UV index in September
Pearl City, IL
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Pearl City, IL
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in September
Pearl City, IL
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
