September weather forecast
Goreville, IL

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Goreville, Illinois, with temperature in the range of an average high of 81.1°F (27.3°C) and an average low of 60.6°F (15.9°C).

Temperature

The beginning of September brings a minor change in the average high-temperature, shifting from a hot 86.5°F (30.3°C) in August to a moderately hot 81.1°F (27.3°C). Goreville observes an average low-temperature of 60.6°F (15.9°C) during September.

Heat index

September's average heat index is evaluated at a tropical 86°F (30°C). Exposure and extended activity could potentially cause a state of fatigue and lead to heat cramps.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.

Humidity

In September, the average relative humidity is 73%.

Rainfall

September is the month with the least rainfall. Rain falls for 8.3 days and accumulates 0.47" (12mm) of precipitation.

Snowfall

In Goreville, snow does not fall in April through October.

Daylight

The average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 6:26 am and sunset at 7:24 pm. On the last day of September, sunrise is at 6:51 am and sunset at 6:40 pm CDT.

Sunshine

In Goreville, the average sunshine in September is 9.4h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 5 in September interprets into the following advice:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Updated: Jun 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Goreville in September?

During September, Goreville experiences an average high-temperature of 81.1°F (27.3°C) and a low-temperature of 60.6°F (15.9°C). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is evaluated at 86°F (30°C).

What is the average humidity in September?

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

What is the driest month?

The month with the least rainfall is September, when the rain falls for 8.3 days and typically collects 0.47" (12mm) of precipitation.

How many days does it rain in September?

In September, the rain falls for 8.3 days. Throughout September, 0.47" (12mm) of precipitation is accumulated.

When it does not snow?

In Goreville, Illinois, snow does not fall in April through October.

How many hours of daylight does Goreville have in September?

The average day length in September is 12h and 25min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:26 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:40 pm CDT.

How many hours of sunshine does Goreville have in September?

In Goreville, the average sunshine duration in September is 9.4h.

How high is the UV index in September?

In Goreville, Illinois, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Goreville, IL

Average temperature in September - Goreville, IL
  • Average high temperature in September: 81.1°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.1°F).

  • Average low temperature in September: 60.6°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 (27°F).

Average pressure in September
Goreville, IL

Average pressure in September - Goreville, IL
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in September
Goreville, IL

Average wind speed in September - Goreville, IL
  • Average wind speed in September: 6.3mph

The windiest months (with the highest average wind speed) are January and February (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

Average humidity in September
Goreville, IL

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

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

Average rainfall in September
Goreville, IL

Average rainfall in September - Goreville, IL
  • Average rainfall in September: 0.47"

The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is September (0.47").

Average rainfall days in September
Goreville, IL

Average rainfall days in September - Goreville, IL
  • Average rainfall days in September: 8.3 days

The month with the highest number of rainy days is July (13.1 days).
The months with the least rainy days are January, February and December (7.3 days).

Average snowfall in September
Goreville, IL

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

The month with the highest snowfall is February (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Goreville, IL

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

The month with the highest number of snowfall days is January (3.3 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
Goreville, IL

Average daylight in September / Average sunshine in September - Goreville, IL
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in September: 9h and 2min

The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).

Average sunshine days in September
Goreville, IL

Average sunshine days in September - Goreville, IL
  • Average sunshine days in September: 19.1 days

The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is June (14.8 days).

Average UV index in September
Goreville, IL

Average UV index in September - Goreville, 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 and December (UV index 2).

Average cloud cover in September
Goreville, IL

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

The months with the most cloud cover are January and February (Cloud cover 51).
The month with the least cloud cover is September (Cloud cover 28).

Average visibility in September
Goreville, IL

Average visibility in September - Goreville, 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).

Goreville, Illinois, USA

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