September weather forecast
Colonial Meadows, IL

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Weather in September

The first month of the autumn, September, is still a warm month in Colonial Meadows, Illinois, with an average temperature fluctuating between 75.6°F (24.2°C) and 57.4°F (14.1°C).

Temperature

Colonial Meadows observes a minor difference in average high-temperatures between August's 79.9°F (26.6°C) and September's 75.6°F (24.2°C). In Colonial Meadows, an average temperature of 57.4°F (14.1°C) is noted during September nights.

Humidity

In Colonial Meadows, the average relative humidity in September is 77%.

Rainfall

In September, the rain falls for 13.2 days. Throughout September, 2.2" (56mm) of precipitation is accumulated. In Colonial Meadows, during the entire year, the rain falls for 163.1 days and collects up to 33.62" (854mm) of precipitation.

Snowfall

In Colonial Meadows, snow does not fall in May through September.

Daylight

The average length of the day in September in Colonial Meadows is 12h and 27min.
On the first day of September, sunrise is at 6:23 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:38 pm CDT.

Sunshine

The average sunshine in September is 8.8h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 5 during September translates into the following directions:
Make use of precautions - It is urged to ward off sun damage. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Enhance your sun protection with tightly woven, yet airy clothing.
Updated: Aug 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

During September, Colonial Meadows experiences an average high-temperature of 75.6°F (24.2°C) and a low-temperature of 57.4°F (14.1°C). In July, the average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, is appraised at 87.8°F (31°C).

What is the average humidity in September?

In Colonial Meadows, Illinois, the average relative humidity in September is 77%.

How much does it rain in September?

In Colonial Meadows, Illinois, during September, the rain falls for 13.2 days and regularly aggregates up to 2.2" (56mm) of precipitation.

When it does not snow?

May through September are months without snowfall in Colonial Meadows.

Does it snow in September?

In Colonial Meadows, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Colonial Meadows have in September?

The average day length in September is 12h and 27min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:23 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:38 pm CDT.

How long on average sun shines in September?

In September, the average sunshine duration is 8.8h.

What is the UV index intensity in September?

In Colonial Meadows, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to the Sun's 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
Colonial Meadows, IL

Average temperature in September - Colonial Meadows, IL
  • Average high temperature in September: 75.6°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.7°F).

  • Average low temperature in September: 57.4°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

Average pressure in September
Colonial Meadows, IL

Average pressure in September - Colonial Meadows, IL
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in September
Colonial Meadows, IL

Average wind speed in September - Colonial Meadows, IL
  • Average wind speed in September: 7.7mph

The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

Average humidity in September
Colonial Meadows, IL

Average humidity in September - Colonial Meadows, IL
  • Average humidity in September: 77%

The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is October (71%).

Average rainfall in September
Colonial Meadows, IL

Average rainfall in September - Colonial Meadows, IL
  • Average rainfall in September: 2.2"

The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is December (1.93").

Average rainfall days in September
Colonial Meadows, IL

Average rainfall days in September - Colonial Meadows, IL
  • Average rainfall days in September: 13.2 days

The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is February (6.9 days).

Average snowfall in September
Colonial Meadows, IL

Average snowfall in September - Colonial Meadows, IL
  • Average snowfall in September: 0"

The month with the highest snowfall is January (5.04").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
Colonial Meadows, IL

Average snowfall days in September - Colonial Meadows, IL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (12.8 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
Colonial Meadows, IL

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

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in September
Colonial Meadows, IL

Average sunshine days in September - Colonial Meadows, IL
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is May (8.4 days).

Average UV index in September
Colonial Meadows, IL

Average UV index in September - Colonial Meadows, 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, October, November and December (UV index 2).

Average cloud cover in September
Colonial Meadows, IL

Average cloud cover in September - Colonial Meadows, IL
  • Average cloud cover in September: 33

The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 33).

Average visibility in September
Colonial Meadows, IL

Average visibility in September - Colonial Meadows, IL
  • Average visibility in September: 6mi

The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).

Colonial Meadows, Illinois, USA

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