September weather forecast
Old Shawneetown, IL

Share

Weather in September

September, the first month of the autumn in Old Shawneetown, is also a moderately hot month, with an average temperature fluctuating between 60.8°F (16°C) and 79.9°F (26.6°C).

Temperature

The advent of September denotes an average high-temperature of a still moderately hot 79.9°F (26.6°C), subtly different from August's 84.9°F (29.4°C). An average nighttime temperature of 60.8°F (16°C) is recorded during September.

Humidity

The average relative humidity in September is 73%.

Rainfall

The month with the least rainfall is September, when the rain falls for 10.8 days and typically collects 1.14" (29mm) of precipitation.

Snowfall

In Old Shawneetown, snow does not fall in May through October.

Daylight

The average length of the day in September in Old Shawneetown is 12h and 25min.
On the first day of the month, sunrise is at 6:23 am and sunset at 7:21 pm. On the last day of September, sunrise is at 6:47 am and sunset at 6:36 pm CDT.

Sunshine

In September, the average sunshine is 9.2h.

UV index

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 5 during September translates into the following directions:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Updated: Aug 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

Old Shawneetown in September has an average high-temperature of 79.9°F (26.6°C) and an average low-temperature of 60.8°F (16°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in August is evaluated at 95°F (35°C).

What is the average humidity in September?

In September, the average relative humidity is 73%.

What is the driest month?

The month with the least rainfall in Old Shawneetown is September, when the rain falls for 10.8 days and typically collects 1.14" (29mm) of precipitation.

How many days does it rain in September?

In Old Shawneetown, during September, the rain falls for 10.8 days and regularly aggregates up to 1.14" (29mm) of precipitation.

When it does not snow?

In Old Shawneetown, snow does not fall in May through October.

What is the average length of the day in September?

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

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:23 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:36 pm CDT.

How many hours of sunshine does Old Shawneetown have in September?

The average sunshine duration in September is 9.2h.

What is the UV index reading in September?

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat 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
Old Shawneetown, IL

Average temperature in September - Old Shawneetown, IL
  • Average high temperature in September: 79.9°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (39.7°F).

  • Average low temperature in September: 60.8°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).

Average pressure in September
Old Shawneetown, IL

Average pressure in September - Old Shawneetown, 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 (29.95"Hg).

Average wind speed in September
Old Shawneetown, IL

Average wind speed in September - Old Shawneetown, IL
  • Average wind speed in September: 6.5mph

The windiest month (with the highest average wind speed) is February (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

Average humidity in September
Old Shawneetown, IL

Average humidity in September - Old Shawneetown, IL
  • Average humidity in September: 73%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (70%).

Average rainfall in September
Old Shawneetown, IL

Average rainfall in September - Old Shawneetown, IL
  • Average rainfall in September: 1.14"

The wettest month (with the highest rainfall) is April (3.27").
The driest month (with the least rainfall) is September (1.14").

Average rainfall days in September
Old Shawneetown, IL

Average rainfall days in September - Old Shawneetown, IL
  • Average rainfall days in September: 10.8 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is November (9 days).

Average snowfall in September
Old Shawneetown, IL

Average snowfall in September - Old Shawneetown, IL
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.87").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Old Shawneetown, IL

Average snowfall days in September - Old Shawneetown, IL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.8 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
Old Shawneetown, IL

Average daylight in September / Average sunshine in September - Old Shawneetown, 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 July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

Average sunshine days in September
Old Shawneetown, IL

Average sunshine days in September - Old Shawneetown, IL
  • Average sunshine days in September: 17 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is May (11.2 days).

Average UV index in September
Old Shawneetown, IL

Average UV index in September - Old Shawneetown, 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
Old Shawneetown, IL

Average cloud cover in September - Old Shawneetown, IL
  • Average cloud cover in September: 28

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 27).

Average visibility in September
Old Shawneetown, IL

Average visibility in September - Old Shawneetown, 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).

Old Shawneetown, Illinois, USA

Weather forecast for your location

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