September weather forecast
Horseshoe, IL

Share

Weather in September

September, the first month of the autumn in Horseshoe, 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 commencement of September brings an average high-temperature of a still moderately hot 80.8°F (27.1°C), marking an inconsequential divergence from August. In September, the nighttime temperature lowers to an average of 60.4°F (15.8°C).

Heat index

September's heat index is calculated to be 84.2°F (29°C). With unrelenting exposure and activity, one might experience exhaustion, leading to potential heat cramps.
For clarity, heat index numbers account for light winds and areas under shade. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.

Humidity

In September, the average relative humidity is 73%.

Rainfall

September is the month with the least rainfall. Rain falls for 10.5 days and accumulates 1.57" (40mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 6:24 am and sunset at 7:22 pm. On the last day of September, sunrise is at 6:48 am and sunset at 6:37 pm CDT.

Sunshine

The average sunshine in September is 9.2h.

UV index

In Horseshoe, Illinois, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 5 during September leads to these advisories:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Updated: Aug 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

Horseshoe in September has an average high-temperature of 80.8°F (27.1°C) and an average low-temperature of 60.4°F (15.8°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, in September is calculated to be 84.2°F (29°C).

What is the average humidity in September?

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

What is the driest month in Horseshoe?

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 many days does it rain in September in Horseshoe?

In Horseshoe, in September, it is raining for 10.5 days, with typically 1.57" (40mm) of accumulated precipitation.

When it does not snow?

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

Does it snow in September?

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

How many hours of daylight does Horseshoe have in September?

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

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:24 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:37 pm CDT.

How many hours of sunshine does Horseshoe have in September?

The average sunshine duration in September is 9.2h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe 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
Horseshoe, IL

Average temperature in September - Horseshoe, 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
Horseshoe, IL

Average pressure in September - Horseshoe, 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
Horseshoe, IL

Average wind speed in September - Horseshoe, 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
Horseshoe, IL

Average humidity in September - Horseshoe, 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
Horseshoe, IL

Average rainfall in September - Horseshoe, 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
Horseshoe, IL

Average rainfall days in September - Horseshoe, 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
Horseshoe, IL

Average snowfall in September - Horseshoe, 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
Horseshoe, IL

Average snowfall days in September - Horseshoe, 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
Horseshoe, IL

Average daylight in September / Average sunshine in September - Horseshoe, 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
Horseshoe, IL

Average sunshine days in September - Horseshoe, 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
Horseshoe, IL

Average UV index in September - Horseshoe, 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
Horseshoe, IL

Average cloud cover in September - Horseshoe, 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
Horseshoe, IL

Average visibility in September - Horseshoe, 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).

Horseshoe, Illinois, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location