September weather forecast
Goreville, IL

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Weather in September

September, the first month of the autumn in Goreville, is also a moderately hot month, 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

A minor decrease in the average high-temperature is observed during September, shifting from a tropical 86.5°F (30.3°C) in August to a moderately hot 81.1°F (27.3°C). Goreville, in September, experiences an average temperature of 60.6°F (15.9°C) at night.

Heat index

September's heat index is calculated to be a tropical 86°F (30°C). Prolonged activity during exposure might result in a state of fatigue and cause heat cramps.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.

Humidity

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

Rainfall

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

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in September in Goreville is 12h and 25min.
On the first day of September in Goreville, 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.

Sunshine

The average sunshine in September in Goreville is 9.4h.

UV index

In September, the average daily maximum UV index in Goreville is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
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Frequently asked questions

What are the temperatures in Goreville in September?

The high-temperature during September is 81.1°F (27.3°C) and the low-temperature is 60.6°F (15.9°C). The average heat index (a.k.a. 'feels like', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in September is calculated to be 86°F (30°C).

What is the average humidity in September in Goreville?

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

What is the driest month in Goreville?

The month with the least rainfall in Goreville 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 Goreville?

In Goreville, in September, during 8.3 rainfall days, 0.47" (12mm) of precipitation is typically accumulated.

When it does not snow in Goreville?

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

How many hours of daylight does Goreville have in September?

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

When is the sunrise / sunset in September in Goreville?

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?

In Goreville, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
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).

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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).

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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).

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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%).

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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").

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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).

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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").

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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).

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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).

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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).

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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).

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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).

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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).

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Goreville, Illinois, USA

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