September weather forecast
Carlinville, IL

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Weather in September

September, the first month of the autumn in Carlinville, is still a warm month, with an average temperature varying between 59.4°F (15.2°C) and 77.9°F (25.5°C).

Temperature

September's presence marks an average high-temperature of a still moderately hot 77.9°F (25.5°C), subtly varied from August's 82.6°F (28.1°C). Carlinville, during September nights, observes an average temperature of 59.4°F (15.2°C).

Humidity

The average relative humidity in September in Carlinville is 75%.

Rainfall

In September, the rain falls for 11.5 days. Throughout September, 1.73" (44mm) of precipitation is accumulated. Throughout the year, there are 138.2 rainfall days, and 23.31" (592mm) of precipitation is accumulated.

Snowfall

In Carlinville, snow does not fall in April through October.

Daylight

In Carlinville, the average length of the day in September is 12h and 26min.
On the first day of September in Carlinville, sunrise is at 6:28 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:43 pm CDT.

Sunshine

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

UV index

In Carlinville, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 5 during September leads to these advisories:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
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Frequently asked questions

What are September temperatures in Carlinville?

The average high-temperature, in September, in Carlinville, is 77.9°F (25.5°C), while the average low-temperature is 59.4°F (15.2°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, is calculated to be 89.6°F (32°C).

What is the average humidity in September in Carlinville?

In September, the average relative humidity in Carlinville is 75%.

How many days does it rain in September in Carlinville?

In September, in Carlinville, the rain falls for 11.5 days. Throughout September, 1.73" (44mm) of precipitation is accumulated.

When it does not snow in Carlinville?

April through October are months without snowfall.

What is the average length of the day in September in Carlinville?

In Carlinville, the average day length in September is 12h and 26min.

What time are sunrise and sunset in September in Carlinville?

On the first day of September, sunrise is at 6:28 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:43 pm CDT.

How many hours of sunshine does Carlinville have in September?

The average sunshine duration in September in Carlinville is 9.4h.

What is the UV index intensity in September in Carlinville?

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

Average temperature in September - Carlinville, IL
  • Average high temperature in September: 77.9°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.9°F).

  • Average low temperature in September: 59.4°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

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Average pressure in September
Carlinville, IL

Average pressure in September - Carlinville, IL
  • Average pressure in September: 30.02"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in September
Carlinville, IL

Average wind speed in September - Carlinville, IL
  • Average wind speed in September: 6.6mph

The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).

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Average humidity in September
Carlinville, IL

Average humidity in September - Carlinville, IL
  • Average humidity in September: 75%

The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in September
Carlinville, IL

Average rainfall in September - Carlinville, IL
  • Average rainfall in September: 1.73"

The wettest month (with the highest rainfall) is June (3.07").
The driest months (with the least rainfall) are January and February (1.22").

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Average rainfall days in September
Carlinville, IL

Average rainfall days in September - Carlinville, IL
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (6.3 days).

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Average snowfall in September
Carlinville, IL

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

The month with the highest snowfall is February (2.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Carlinville, IL

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

The month with the highest number of snowfall days is February (6.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 54min).
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 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

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Average sunshine days in September
Carlinville, IL

Average sunshine days in September - Carlinville, IL
  • Average sunshine days in September: 16 days

The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is May (11.1 days).

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Average UV index in September
Carlinville, IL

Average UV index in September - Carlinville, IL
  • Average UV index in September: 5

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Carlinville, IL

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

The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are August and September (Cloud cover 29).

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Average visibility in September
Carlinville, IL

Average visibility in September - Carlinville, 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).

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Carlinville, Illinois, USA

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