September weather forecast
Antioch, IL

Weather in September

The first month of the autumn, September, is also an agreeable month in Antioch, Illinois, with average temperature fluctuating between 55°F (12.8°C) and 71.6°F (22°C).

Temperature

In September, the average high-temperature slightly decreases, from a warm 77.5°F (25.3°C) in August, to a pleasant 71.6°F (22°C). In September, in Antioch, the average low-temperature is 55°F (12.8°C).

Humidity

The average relative humidity in September is 80%.

Rainfall

In Antioch, it is raining for 12.5 days, with typically 1.89" (48mm) of accumulated precipitation. Throughout the year, in Antioch, there are 139.6 rainfall days, and 26.18" (665mm) of precipitation is accumulated.

Snowfall

In Antioch snow does not fall in June through September.

Daylight

In Antioch, Illinois, the average length of the day is 12.5h.

Sunshine

The average sunshine in September is 8.9h.

UV index

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the average humidity in September in Antioch?

In Antioch, Illinois, the average relative humidity in September is 80%.

How many days does it rain in September in Antioch?

In Antioch, during September, the rain falls for 12.5 days and regularly aggregates up to 1.89" (48mm) of precipitation.

When it does not snow in Antioch?

June through September are months without snowfall in Antioch, Illinois.

Does it snow in Antioch in September?

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

How many hours of daylight does Antioch have in September?

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

How long on average sun shines in September in Antioch?

The average sunshine in September in Antioch is 8.9h.

What is the UV index intensity in September in Antioch?

In Antioch, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV rays.

Average temperature in September
Antioch, IL

Average temperature in September - Antioch, IL
  • Average high temperature in September: 71.6°F

The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (26.2°F).

  • Average low temperature in September: 55°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).

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Average pressure in September
Antioch, IL

Average pressure in September - Antioch, IL
  • Average pressure in September: 30.03"

Months with the highest atmospheric pressure are January and February (30.1").
The month with the lowest atmospheric pressure is June (29.92").

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Average wind speed in September
Antioch, IL

Average wind speed in September - Antioch, IL
  • Average wind speed in September: 7.5mph

The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

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Average humidity in September
Antioch, IL

Average humidity in September - Antioch, IL
  • Average humidity in September: 80%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (76%).

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Average rainfall in September
Antioch, IL

Average rainfall in September - Antioch, IL
  • Average rainfall in September: 1.89"

The wettest month (with the highest rainfall) is June (3.54").
The driest month (with the least rainfall) is December (1.06").

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Average rainfall days in September
Antioch, IL

Average rainfall days in September - Antioch, IL
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is February (3.4 days).

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Average snowfall in September
Antioch, IL

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

The month with the highest snowfall is January (4.33").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Antioch, IL

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

The month with the highest number of snowfall days is January (10.1 days).
Months with the least snowfall days are June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in September: 8.9h

Months with the most sunshine are July and August (Average sunshine: 9.9h).
Months with the least sunshine are January and February (Average sunshine: 3.6).

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Average sunshine days in September
Antioch, IL

Average sunshine days in September - Antioch, IL
  • Average sunshine days in September: 14.6 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (9.9 days).

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Average UV index in September
Antioch, IL

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

Months with the highest UV index are May, June, July and August (UV index 5).
Months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in September
Antioch, IL

Average cloud cover in September - Antioch, IL
  • Average cloud cover in September: 32

The month with the most cloud cover is January (Cloud cover 63).
Months with the least cloud cover are July, August and September (Cloud cover 32).

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Average visibility in September
Antioch, IL

Average visibility in September - Antioch, 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).

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