September weather forecast
Virginia, IL

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Weather in September

The first month of the autumn, September, is still a warm month in Virginia, Illinois, with an average temperature varying between 77.7°F (25.4°C) and 58.6°F (14.8°C).

Temperature

The onset of September marks an average high-temperature of a still moderately hot 77.7°F (25.4°C), hardly differing from August's 82.4°F (28°C). Throughout September, an average nighttime temperature of 58.6°F (14.8°C) is experienced.

Humidity

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

Rainfall

In Virginia, during September, the rain falls for 12.3 days and regularly aggregates up to 2.95" (75mm) of precipitation. Throughout the year, there are 155 rainfall days, and 31.73" (806mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall in Virginia.

Daylight

The average length of the day in September in Virginia is 12h and 26min.
On the first day of the month, sunrise is at 6:29 am and sunset at 7:31 pm. On the last day of September, in Virginia, Illinois, sunrise is at 6:56 am and sunset at 6:44 pm CDT.

Sunshine

The average sunshine in September in Virginia is 9.4h.

UV index

The average daily maximum UV index in September in Virginia, Illinois, is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, the maximum UV index of 5 transforms into these recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
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Frequently asked questions

What are September temperatures in Virginia?

In Virginia, 77.7°F (25.4°C) is the average high-temperature and 58.6°F (14.8°C) is the average low-temperature during September. The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in August is estimated at 89.6°F (32°C).

What is the average humidity in September in Virginia?

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

How much does it rain in Virginia in September?

In September, in Virginia, Illinois, the rain falls for 12.3 days. Throughout September, 2.95" (75mm) of precipitation is accumulated.

When it does not snow in Virginia?

May through September are months without snowfall.

Does it snow in Virginia in September?

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

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

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

What time are sunrise and sunset in September in Virginia?

On the first day of September in Virginia, sunrise is at 6:29 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:44 pm CDT.

How many hours of sunshine does Virginia have in September?

The average sunshine duration in September is 9.4h.

What is the UV index intensity in September in Virginia?

The average daily maximum UV index in September in Virginia is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe 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
Virginia, IL

Average temperature in September - Virginia, IL
  • Average high temperature in September: 77.7°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.1°F).

  • Average low temperature in September: 58.6°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

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Average pressure in September
Virginia, IL

Average pressure in September - Virginia, 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 (29.91"Hg).

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Average wind speed in September
Virginia, IL

Average wind speed in September - Virginia, IL
  • Average wind speed in September: 7.1mph

The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).

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Average humidity in September
Virginia, IL

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

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

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Average rainfall in September
Virginia, IL

Average rainfall in September - Virginia, IL
  • Average rainfall in September: 2.95"

The wettest month (with the highest rainfall) is May (3.98").
The driest month (with the least rainfall) is December (1.57").

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Average rainfall days in September
Virginia, IL

Average rainfall days in September - Virginia, IL
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is February (6.6 days).

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Average snowfall in September
Virginia, IL

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

The month with the highest snowfall is January (3.9").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Virginia, IL

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

The month with the highest number of snowfall days is January (10 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
Virginia, IL

Average daylight in September / Average sunshine in September - Virginia, 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 24min).

  • 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 12min).

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Average sunshine days in September
Virginia, IL

Average sunshine days in September - Virginia, IL
  • Average sunshine days in September: 15.1 days

The months with the most sunshine days are November and December (18.6 days).
The month with the least sunshine days is June (8.3 days).

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Average UV index in September
Virginia, IL

Average UV index in September - Virginia, 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
Virginia, IL

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

The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are June, July, August and September (Cloud cover 30).

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Average visibility in September
Virginia, IL

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

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

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Virginia, Illinois, USA

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