September weather forecast
Andalusia, IL

Weather in September

The first month of the autumn, September, is also a moderately hot month in Andalusia, Illinois, with average temperature varying between 56.3°F (13.5°C) and 75.4°F (24.1°C).

Temperature

In Andalusia, Illinois, the average high-temperature in September marginally drops, from 80.8°F (27.1°C) in August, to a still moderately hot 75.4°F (24.1°C). In September, the average low-temperature is 56.3°F (13.5°C).

Humidity

In Andalusia, the average relative humidity in September is 76%.

Rainfall

In September, in Andalusia, the rain falls for 9.5 days. Throughout September, 1.38" (35mm) of precipitation is accumulated. Throughout the year, in Andalusia, there are 128 rainfall days, and 19.29" (490mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall in Andalusia.

Daylight

The average length of the day in September is 12.5h.

Sunshine

The average sunshine is 9.4h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
[Resources]

FAQ

What is the average humidity in September in Andalusia?

In Andalusia, Illinois, the average relative humidity in September is 76%.

How much does it rain in Andalusia in September?

In September, in Andalusia, Illinois, the rain falls for 9.5 days. Throughout September, 1.38" (35mm) of precipitation is accumulated.

When it does not snow in Andalusia?

In Andalusia, Illinois, snow does not fall in May through September.

Does it snow in Andalusia in September?

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

How many hours of daylight does Andalusia have in September?

In September, the average length of the day in Andalusia, Illinois, is 12.5h.

How many hours of sunshine does Andalusia have in September?

In Andalusia, Illinois, the average sunshine in September is 9.4h.

What is the UV index reading in September in Andalusia?

In Andalusia, Illinois, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in September
Andalusia, IL

Average temperature in September - Andalusia, IL
  • Average high temperature in September: 75.4°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.2°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).

[Resources]

Average pressure in September
Andalusia, IL

Average pressure in September - Andalusia, IL
  • Average pressure in September: 30.02"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is June (29.9").

[Resources]

Average wind speed in September
Andalusia, IL

Average wind speed in September - Andalusia, IL
  • Average wind speed in September: 7.8mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).

[Resources]

Average humidity in September
Andalusia, IL

Average humidity in September - Andalusia, IL
  • Average humidity in September: 76%

Months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).

[Resources]

Average rainfall in September
Andalusia, IL

Average rainfall in September - Andalusia, IL
  • Average rainfall in September: 1.38"

The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is December (0.75").

[Resources]

Average rainfall days in September
Andalusia, IL

Average rainfall days in September - Andalusia, IL
  • Average rainfall days in September: 9.5 days

The month with the highest number of rainy days is June (17 days).
The month with the least rainy days is January (4.2 days).

[Resources]

Average snowfall in September
Andalusia, IL

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

The month with the highest snowfall is February (2.52").
Months with the least snowfall are May, June, July, August and September (0").

[Resources]

Average snowfall days in September
Andalusia, IL

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

The month with the highest number of snowfall days is January (10.3 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

[Resources]

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

Average daylight in September / Average sunshine in September - Andalusia, IL
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in September: 9.4h

The month with the most sunshine is July (Average sunshine: 10.3h).
The month with the least sunshine is January (Average sunshine: 4h).

[Resources]

Average sunshine days in September
Andalusia, IL

Average sunshine days in September - Andalusia, IL
  • Average sunshine days in September: 18.5 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is June (10.8 days).

[Resources]

Average UV index in September
Andalusia, IL

Average UV index in September - Andalusia, IL
  • Average UV index in September: 4

Months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).

[Resources]

Average cloud cover in September
Andalusia, IL

Average cloud cover in September - Andalusia, IL
  • Average cloud cover in September: 30

The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 29).

[Resources]

Average visibility in September
Andalusia, IL

Average visibility in September - Andalusia, IL
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location