September weather forecast
Ashley, IL

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Ashley, Illinois, with temperature in the range of an average high of 79.2°F (26.2°C) and an average low of 59.9°F (15.5°C).

Temperature

The introduction of September notes a subtle temperature variation to a still warm 79.2°F (26.2°C) from August's 84.4°F (29.1°C). Throughout September, Ashley experiences a low-temperature average of 59.9°F (15.5°C).

Humidity

The average relative humidity in September is 74%.

Rainfall

In Ashley, in September, during 14.1 rainfall days, 2.09" (53mm) of precipitation is typically accumulated. In Ashley, during the entire year, the rain falls for 166.8 days and collects up to 37.83" (961mm) of precipitation.

Snowfall

Months with snowfall are January through April, September, November and December. September is the first month it typically snows in Ashley. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Ashley, during the entire year, snow falls for 23.2 days and aggregates up to 7.87" (200mm) of snow.

Daylight

The average length of the day in September is 12h and 25min.
On the first day of September, sunrise is at 6:26 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:40 pm CDT.

Sunshine

The average sunshine in September is 9.3h.

UV index

In Ashley, Illinois, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index of 5 during September translates into these guidelines:
Undertake precautions - Obligation exists to protect against skin and eye damage. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Updated: Jul 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

The average high-temperature, in September, in Ashley, is 79.2°F (26.2°C), while the average low-temperature is 59.9°F (15.5°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is appraised at 95°F (35°C).

What is the average humidity in September?

In Ashley, Illinois, the average relative humidity in September is 74%.

How many days does it rain in September?

In September, the rain falls for 14.1 days. Throughout September, 2.09" (53mm) of precipitation is accumulated.

When does it start snowing?

September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow.

How many hours of daylight does Ashley have in September?

In Ashley, 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 6:26 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:40 pm CDT.

How many hours of sunshine does Ashley have in September?

The average sunshine duration in September is 9.3h.

How high is the UV index in September?

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

Average temperature in September - Ashley, IL
  • Average high temperature in September: 79.2°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in September: 59.9°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 (25°F).

Average pressure in September
Ashley, IL

Average pressure in September - Ashley, 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 (29.93"Hg).

Average wind speed in September
Ashley, IL

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

The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).

Average humidity in September
Ashley, IL

Average humidity in September - Ashley, IL
  • Average humidity in September: 74%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (71%).

Average rainfall in September
Ashley, IL

Average rainfall in September - Ashley, IL
  • Average rainfall in September: 2.09"

The wettest month (with the highest rainfall) is April (4.45").
The driest month (with the least rainfall) is February (2.01").

Average rainfall days in September
Ashley, IL

Average rainfall days in September - Ashley, IL
  • Average rainfall days in September: 14.1 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is December (9.2 days).

Average snowfall in September
Ashley, IL

Average snowfall in September - Ashley, IL
  • Average snowfall in September: 0.04"

The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August and October (0").

Average snowfall days in September
Ashley, IL

Average snowfall days in September - Ashley, IL
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are May, June, July and August (0 days).

Average daylight in September /
Average sunshine in September
Ashley, IL

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

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

Average sunshine days in September
Ashley, IL

Average sunshine days in September - Ashley, IL
  • Average sunshine days in September: 14.5 days

The months with the most sunshine days are October and November (17.5 days).
The month with the least sunshine days is May (9.3 days).

Average UV index in September
Ashley, IL

Average UV index in September - Ashley, 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
Ashley, IL

Average cloud cover in September - Ashley, IL
  • Average cloud cover in September: 29

The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 28).

Average visibility in September
Ashley, IL

Average visibility in September - Ashley, 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).

Ashley, Illinois, USA

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