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
A modest decline in the average high-temperature is seen during September, decreasing from a warm 84°F (28.9°C) in August to a still moderately hot 78.6°F (25.9°C). Edwardsville throughout September, experiences an average nighttime temperature of 59.4°F (15.2°C).Humidity
In September, the average relative humidity in Edwardsville is 75%.Rainfall
In Edwardsville, during September, the rain falls for 11.8 days and regularly aggregates up to 1.69" (43mm) of precipitation. Throughout the year, in Edwardsville, there are 138 rainfall days, and 23.9" (607mm) of precipitation is accumulated.Snowfall
In Edwardsville, snow does not fall in May through October.Daylight
The average length of the day in September in Edwardsville is 12h and 26min.On the first day of the month, sunrise is at 6:29 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:43 pm CDT.
Sunshine
In September, the average sunshine in Edwardsville is 9.3h.UV index
In Edwardsville, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the UV index of 5 transforms into the following advice:
Adopt protective measures - It is advised to guard against sun damage. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Frequently asked questions
What are September temperatures in Edwardsville?
What is the average humidity in September in Edwardsville?
How much does it rain in Edwardsville in September?
When it does not snow in Edwardsville?
How many hours of daylight does Edwardsville have in September?
When is the sunrise / sunset in September in Edwardsville?
How long on average sun shines in September in Edwardsville?
What is the UV index intensity in September in Edwardsville?
Average temperature in September
Edwardsville, IL
- Average high temperature in September: 78.6°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in September: 59.4°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in September
Edwardsville, IL
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Edwardsville, IL
- Average wind speed in September: 6.3mph
The windiest months (with the highest average wind speed) are January and February (9.6mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).
Average humidity in September
Edwardsville, IL
- Average humidity in September: 75%
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Edwardsville, IL
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is February (1.14").
Average rainfall days in September
Edwardsville, IL
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is January (5.6 days).
Average snowfall in September
Edwardsville, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Edwardsville, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Edwardsville, IL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 30min).
Average sunshine days in September
Edwardsville, IL
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in September
Edwardsville, IL
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Edwardsville, IL
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility in September
Edwardsville, IL
- 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).
Edwardsville, Illinois, USA
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