September weather forecast
Eldorado, IL

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Weather in September

September, the first month of the autumn in Eldorado, is still a warm month, with an average temperature varying between 60.4°F (15.8°C) and 80.8°F (27.1°C).

Temperature

The beginning of September reveals an average high-temperature of a still warm 80.8°F (27.1°C), showing minimal deviation from the previous month. Nightly temperatures in Eldorado drop to an average low of 60.4°F (15.8°C) in September.

Heat index

The heat index value for September is computed to be 84.2°F (29°C). Continuous exposure and activity could induce a sense of tiredness and subsequently, heat cramps.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', shows a temperature sensation when both heat and moisture conditions are combined. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.

Humidity

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

Rainfall

The month with the least rainfall in Eldorado is September, when the rain falls for 10.5 days and typically collects 1.57" (40mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in September is 12h and 25min.
On the first day of September, sunrise is at 6:24 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:37 pm CDT.

Sunshine

In Eldorado, the average sunshine in September is 9.2h.

UV index

The average daily maximum UV index in September in Eldorado is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, a regular UV index of 5 translates into these guidelines:
Take measures. Individuals with light skin might experience burns in under 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. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Updated: Jul 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

An average high-temperature, in September, in Eldorado, is 80.8°F (27.1°C) and the average low-temperature is 60.4°F (15.8°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, in September is computed to be 84.2°F (29°C).

What is the average humidity in September?

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 10.5 days and typically collects 1.57" (40mm) of precipitation.

How much does it rain in September?

In September, the rain falls for 10.5 days. Throughout September, 1.57" (40mm) of precipitation is accumulated.

When it does not snow?

May through September are months without snowfall.

Does it snow in Eldorado in September?

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

What is the average length of the day in September?

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

When are sunrise and sunset in September in Eldorado?

On the first day of September, sunrise is at 6:24 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:37 pm CDT.

How many hours of sunshine does Eldorado have in September?

The average sunshine duration in September is 9.2h.

What is the UV index reading in September?

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability 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
Eldorado, IL

Average temperature in September - Eldorado, IL
  • Average high temperature in September: 80.8°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 (39.7°F).

  • Average low temperature in September: 60.4°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 (26.2°F).

Average pressure in September
Eldorado, IL

Average pressure in September - Eldorado, 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
Eldorado, IL

Average wind speed in September - Eldorado, IL
  • Average wind speed in September: 6.4mph

The windiest months (with the highest average wind speed) are January and February (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

Average humidity in September
Eldorado, IL

Average humidity in September - Eldorado, 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 (70%).

Average rainfall in September
Eldorado, IL

Average rainfall in September - Eldorado, IL
  • Average rainfall in September: 1.57"

The wettest month (with the highest rainfall) is April (4.8").
The driest month (with the least rainfall) is September (1.57").

Average rainfall days in September
Eldorado, IL

Average rainfall days in September - Eldorado, IL
  • Average rainfall days in September: 10.5 days

The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is November (9.7 days).

Average snowfall in September
Eldorado, IL

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

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

Average snowfall days in September
Eldorado, IL

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

The month with the highest number of snowfall days is January (5.3 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
Eldorado, IL

Average daylight in September / Average sunshine in September - Eldorado, 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 1min

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 36min).

Average sunshine days in September
Eldorado, IL

Average sunshine days in September - Eldorado, IL
  • Average sunshine days in September: 17.1 days

The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is May (9.9 days).

Average UV index in September
Eldorado, IL

Average UV index in September - Eldorado, 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
Eldorado, IL

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

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

Average visibility in September
Eldorado, IL

Average visibility in September - Eldorado, 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).

Eldorado, Illinois, USA

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