October weather forecast
Clarendon Hills, IL

Weather in October

October, like September, is another mild autumn month in Clarendon Hills, Illinois, with temperature in the range of an average high of 60.6°F (15.9°C) and an average low of 45.7°F (7.6°C).

Temperature

In October, the average high-temperature decreases, from a moderately hot 74.3°F (23.5°C) in September, to a moderate 60.6°F (15.9°C). The average low-temperature, in October, is 45.7°F (7.6°C).

Humidity

October is the least humid month in Clarendon Hills, with an average relative humidity of 72%.

Rainfall

In Clarendon Hills, during 9.8 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. Throughout the year, in Clarendon Hills, there are 118.5 rainfall days, and 13.74" (349mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Clarendon Hills, Illinois, are January through April, October through December. October is the first month it typically snows in Clarendon Hills. Throughout October, in the average 0.4 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, in Clarendon Hills, there are 34.9 snowfall days, and 7.2" (183mm) of snow is accumulated.

Daylight

In October, the average length of the day in Clarendon Hills is 11.1h.

Sunshine

In Clarendon Hills, the average sunshine is 5.6h.

UV index

In October, the average daily maximum UV index in Clarendon Hills is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 3 in October interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the least humid month in Clarendon Hills?

With an average relative humidity of 72%, October is the least humid month in Clarendon Hills, Illinois.

What is the average humidity in October in Clarendon Hills?

In Clarendon Hills, the average relative humidity in October is 72%.

How much does it rain in Clarendon Hills in October?

In Clarendon Hills, in October, during 9.8 rainfall days, 1.22" (31mm) of precipitation is typically accumulated.

When does it start to snow in Clarendon Hills?

October is the first month it typically snows in Clarendon Hills, Illinois. Throughout October, in the average 0.4 snowfall days, it receives 0.2" (5mm) of snow.

How many hours of daylight does Clarendon Hills have in October?

In October, the average length of the day in Clarendon Hills is 11.1h.

How many hours of sunshine does Clarendon Hills have in October?

In October, the average sunshine in Clarendon Hills is 5.6h.

What is the UV index reading in October in Clarendon Hills?

In Clarendon Hills, Illinois, the average daily maximum UV index in October is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in October
Clarendon Hills, IL

Average temperature in October - Clarendon Hills, IL
  • Average high temperature in October: 60.6°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in October: 45.7°F

The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

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Average pressure in October
Clarendon Hills, IL

Average pressure in October - Clarendon Hills, IL
  • Average pressure in October: 30.01"

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is June (29.92").

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Average wind speed in October
Clarendon Hills, IL

Average wind speed in October - Clarendon Hills, IL
  • Average wind speed in October: 8.6mph

The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

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Average humidity in October
Clarendon Hills, IL

Average humidity in October - Clarendon Hills, IL
  • Average humidity in October: 72%

Months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in October
Clarendon Hills, IL

Average rainfall in October - Clarendon Hills, IL
  • Average rainfall in October: 1.22"

The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is December (0.63").

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Average rainfall days in October
Clarendon Hills, IL

Average rainfall days in October - Clarendon Hills, IL
  • Average rainfall days in October: 9.8 days

The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is February (4.2 days).

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Average snowfall in October
Clarendon Hills, IL

Average snowfall in October - Clarendon Hills, IL
  • Average snowfall in October: 0.2"

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

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Average snowfall days in October
Clarendon Hills, IL

Average snowfall days in October - Clarendon Hills, IL
  • Average snowfall days in October: 0.4 days

The month with the highest number of snowfall days is January (9.7 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in October /
Average sunshine in October
Clarendon Hills, IL

Average daylight in October / Average sunshine in October - Clarendon Hills, IL
  • Average daylight in October: 11.1h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in October: 5.6h

The month with the most sunshine is August (Average sunshine: 10h).
The month with the least sunshine is January (Average sunshine: 3.7h).

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Average sunshine days in October
Clarendon Hills, IL

Average sunshine days in October - Clarendon Hills, IL
  • Average sunshine days in October: 19.6 days

The month with the most sunshine days is December (20.7 days).
The month with the least sunshine days is July (11.8 days).

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Average UV index in October
Clarendon Hills, IL

Average UV index in October - Clarendon Hills, IL
  • Average UV index in October: 3

Months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in October
Clarendon Hills, IL

Average cloud cover in October - Clarendon Hills, IL
  • Average cloud cover in October: 42

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in October
Clarendon Hills, IL

Average visibility in October - Clarendon Hills, IL
  • Average visibility in October: 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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