September weather forecast
Carbondale, IL

Weather in September

The first month of the autumn, September, is still a warm month in Carbondale, Illinois, with an average temperature ranging between min 60.3°F (15.7°C) and max 80.4°F (26.9°C).

Temperature

In Carbondale, the average high-temperature in September marginally drops from 85.8°F (29.9°C) in August to a still warm 80.4°F (26.9°C). In Carbondale, in September, the average low-temperature is 60.3°F (15.7°C).

Humidity

In Carbondale, the average relative humidity in September is 73%.

Rainfall

The month with the least rainfall is September, when the rain falls for 12.7 days and typically collects 1.85" (47mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

In Carbondale, the average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 6:27 am and sunset at 7:26 pm. On the last day of September, in Carbondale, Illinois, sunrise is at 6:51 am and sunset at 6:41 pm CDT.

Sunshine

In Carbondale, Illinois, the average sunshine in September is 9.5h.

UV index

The average daily maximum UV index in September in Carbondale is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Carbondale?

In Carbondale, Illinois, in September, the average high-temperature is 80.4°F (26.9°C), and the average low-temperature is 60.3°F (15.7°C). in August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is computed to be 96.8°F (36°C).

What is the average humidity in September in Carbondale?

In Carbondale, the average relative humidity in September is 73%.

What is the driest month in Carbondale?

September is the month with the least rainfall in Carbondale. Rain falls for 12.7 days and accumulates 1.85" (47mm) of precipitation.

How much does it rain in Carbondale in September?

In Carbondale, Illinois, during September, the rain falls for 12.7 days and regularly aggregates up to 1.85" (47mm) of precipitation.

When it does not snow in Carbondale?

In Carbondale, snow does not fall in May through September.

Does it snow in Carbondale in September?

In Carbondale, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Carbondale have in September?

In Carbondale, Illinois, the average day length in September is 12h and 25min.

What time are sunrise and sunset in September in Carbondale?

On the first day of September, sunrise is at 6:27 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:41 pm CDT.

How many hours of sunshine does Carbondale have in September?

The average sunshine duration in September in Carbondale is 9.5h.

What is the UV index reading in September in Carbondale?

In September, the average daily maximum UV index in Carbondale, Illinois, is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Carbondale, IL

Average temperature in September - Carbondale, IL
  • Average high temperature in September: 80.4°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).

  • Average low temperature in September: 60.3°F

The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).

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Average pressure in September
Carbondale, IL

Average pressure in September - Carbondale, 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).

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Average wind speed in September
Carbondale, IL

Average wind speed in September - Carbondale, IL
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

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Average humidity in September
Carbondale, IL

Average humidity in September - Carbondale, IL
  • Average humidity in September: 73%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in September
Carbondale, IL

Average rainfall in September - Carbondale, IL
  • Average rainfall in September: 1.85"

The wettest month (with the highest rainfall) is April (4.49").
The driest month (with the least rainfall) is September (1.85").

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Average rainfall days in September
Carbondale, IL

Average rainfall days in September - Carbondale, IL
  • Average rainfall days in September: 12.7 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (9.4 days).

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Average snowfall in September
Carbondale, IL

Average snowfall in September - Carbondale, IL
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Carbondale, IL

Average snowfall days in September - Carbondale, IL
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Carbondale, IL

Average daylight in September / Average sunshine in September - Carbondale, IL
  • Average daylight in September: 12h and 25min

The month with the longest days is June (Average daylight: 14h and 44min).
The month with the shortest days is December (Average daylight: 9h and 37min).

  • Average sunshine in September: 9h and 30min

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).

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Average sunshine days in September
Carbondale, IL

Average sunshine days in September - Carbondale, IL
  • Average sunshine days in September: 16 days

The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (11.3 days).

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Average UV index in September
Carbondale, IL

Average UV index in September - Carbondale, 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).

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Average cloud cover in September
Carbondale, IL

Average cloud cover in September - Carbondale, IL
  • Average cloud cover in September: 28

The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 27).

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Average visibility in September
Carbondale, IL

Average visibility in September - Carbondale, 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).

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