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 arrival comes with a mild decrease in the average high-temperature, moving subtly from a warm 85.5°F (29.7°C) in August to a still moderately hot 79.5°F (26.4°C). In the month of September, Coulterville records a consistent average low-temperature of 60.1°F (15.6°C).Humidity
In Coulterville, the average relative humidity in September is 74%.Rainfall
In September, the rain falls for 10.3 days. Throughout September, 1.06" (27mm) of precipitation is accumulated. In Coulterville, during the entire year, the rain falls for 125.7 days and collects up to 18.31" (465mm) of precipitation.Snowfall
April through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 25min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:27 pm. On the last day of September, sunrise is at 6:53 am and sunset at 6:42 pm CDT.
Sunshine
In Coulterville, the average sunshine in September is 9.4h.UV index
In September, the average daily maximum UV index in Coulterville, Illinois, is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: A maximum UV index of 5 in September translates into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Coulterville?
What is the average humidity in September in Coulterville?
How much does it rain in Coulterville in September?
When it does not snow in Coulterville?
Does it snow in Coulterville in September?
How many hours of daylight does Coulterville have in September?
When are sunrise and sunset in September in Coulterville?
How long on average sun shines in September in Coulterville?
How high is the UV index in September in Coulterville?
Average temperature in September
Coulterville, IL
- Average high temperature in September: 79.5°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in September: 60.1°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).
Average pressure in September
Coulterville, 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 (29.93"Hg).
Average wind speed in September
Coulterville, IL
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity in September
Coulterville, IL
- Average humidity in September: 74%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Coulterville, IL
- Average rainfall in September: 1.06"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days in September
Coulterville, IL
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is July (15 days).
The month with the least rainy days is January (6.1 days).
Average snowfall in September
Coulterville, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.38").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Coulterville, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.8 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
Coulterville, 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 36min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in September
Coulterville, IL
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is December (21.7 days).
The month with the least sunshine days is July (13 days).
Average UV index in September
Coulterville, IL
- Average UV index in September: 5
The months with the highest UV index are 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
Coulterville, IL
- Average cloud cover in September: 28
The months with the most cloud cover are January and February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in September
Coulterville, 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).
Coulterville, Illinois, USA
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