October weather forecast
Illinois City, IL

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Weather in October

October, like September, in Illinois City, Illinois, is another enjoyable autumn month, with an average temperature ranging between min 45.1°F (7.3°C) and max 61.5°F (16.4°C).

Temperature

A shift in Illinois City's weather is observed as September turns into October, with the average high temperature reducing from a warm 75.4°F (24.1°C) to an enjoyable 61.5°F (16.4°C). During the nights in October, Illinois City experiences a consistent average temperature of 45.1°F (7.3°C).

Humidity

With an average relative humidity of 71%, October is the least humid month in Illinois City, Illinois.

Rainfall

In Illinois City, in October, it is raining for 11.1 days, with typically 1.5" (38mm) of accumulated precipitation. Throughout the year, in Illinois City, there are 128 rainfall days, and 19.29" (490mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, October through December. October is the first month it typically snows in Illinois City. Throughout October, in the average 0.7 snowfall days, it receives 0.43" (11mm) of snow. In Illinois City, during the entire year, snow falls for 35.4 days and aggregates up to 8.35" (212mm) of snow.

Daylight

In October, the average length of the day is 11h and 5min.
On the first day of October, sunrise is at 7:01 am and sunset at 6:44 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 5:59 pm CDT.

Sunshine

The average sunshine in October is 5.5h.

UV index

In October, the average daily maximum UV index is 3. 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 3 during October leads to these advisories:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. During bright days, sunglasses that offer UVA and UVB defense are recommended. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What is the average October temperature in Illinois City?

In Illinois City, 61.5°F (16.4°C) is the average high-temperature and 45.1°F (7.3°C) is the average low-temperature during October. The average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in August is calculated to be 86°F (30°C).

What is the least humid month in Illinois City?

October is the least humid month in Illinois City, with an average relative humidity of 71%.

What is the average humidity in October in Illinois City?

In Illinois City, the average relative humidity in October is 71%.

How many days does it rain in October in Illinois City?

In October, in Illinois City, Illinois, the rain falls for 11.1 days. Throughout October, 1.5" (38mm) of precipitation is accumulated.

When does it start to snow in Illinois City?

October is the first month it typically snows. Throughout October, in the average 0.7 snowfall days, it receives 0.43" (11mm) of snow.

What is the average length of the day in October in Illinois City?

In Illinois City, Illinois, the average day length in October is 11h and 5min.

What time are sunrise and sunset in October in Illinois City?

In October, on the first day of the month, sunrise is at 7:01 am and sunset at 6:44 pm. On the last day of the month, in Illinois City, sunrise is at 7:34 am and sunset at 5:59 pm CDT.

How long on average sun shines in October in Illinois City?

In October, the average sunshine duration in Illinois City, Illinois, is 5.5h.

What is the UV index reading in October in Illinois City?

The average daily maximum UV index in October in Illinois City, Illinois, is 3. 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 days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Illinois City, IL

Average temperature in October - Illinois City, IL
  • Average high temperature in October: 61.5°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 October: 45.1°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).

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Average pressure in October
Illinois City, IL

Average pressure in October - Illinois City, IL
  • Average pressure in October: 30.01"Hg

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

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Average wind speed in October
Illinois City, IL

Average wind speed in October - Illinois City, IL
  • Average wind speed in October: 9.6mph

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).

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Average humidity in October
Illinois City, IL

Average humidity in October - Illinois City, IL
  • Average humidity in October: 71%

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

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Average rainfall in October
Illinois City, IL

Average rainfall in October - Illinois City, IL
  • Average rainfall in October: 1.5"

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

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Average rainfall days in October
Illinois City, IL

Average rainfall days in October - Illinois City, IL
  • Average rainfall days in October: 11.1 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).

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Average snowfall in October
Illinois City, IL

Average snowfall in October - Illinois City, IL
  • Average snowfall in October: 0.43"

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

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Average snowfall days in October
Illinois City, IL

Average snowfall days in October - Illinois City, IL
  • Average snowfall days in October: 0.7 days

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

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Average daylight in October /
Average sunshine in October
Illinois City, IL

Average daylight in October / Average sunshine in October - Illinois City, IL
  • Average daylight in October: 11h and 1min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in October: 5h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days in October
Illinois City, IL

Average sunshine days in October - Illinois City, IL
  • Average sunshine days in October: 17.5 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).

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Average UV index in October
Illinois City, IL

Average UV index in October - Illinois City, IL
  • Average UV index in October: 3

The 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).

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Average cloud cover in October
Illinois City, IL

Average cloud cover in October - Illinois City, IL
  • Average cloud cover in October: 38

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

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Average visibility in October
Illinois City, IL

Average visibility in October - Illinois City, IL
  • Average visibility in October: 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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Illinois City, Illinois, USA

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