October weather forecast
Naperville, IL

A covered bridge over a river along the famous Naperville Riverwalk in Naperville, Illinois
A covered bridge over a river along the famous Naperville Riverwalk in Naperville, Illinois

Weather in October

October, the same as September, in Naperville, Illinois, is another mild autumn month, with average temperature fluctuating between 60.6°F (15.9°C) and 45.5°F (7.5°C).

Temperature

In Naperville, the average high-temperature in October drops, from a warm 73.8°F (23.2°C) in September, to a mild 60.6°F (15.9°C). In October, the average low-temperature is 45.5°F (7.5°C).

Humidity

The least humid month in Naperville is October, with an average relative humidity of 73%.

Rainfall

In Naperville, in October, during 11 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. In Naperville, during the entire year, the rain falls for 132.2 days and collects up to 16.22" (412mm) of precipitation.

Snowfall

Months with snowfall in Naperville are January through April, October through December. October is the first month it typically snows. Throughout October, in the average 0.4 snowfall days, it receives 0.16" (4mm) of snow. In Naperville, during the entire year, snow falls for 38.7 days, and aggregates up to 6.93" (176mm) of snow.

Daylight

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

Sunshine

In October, the average sunshine is 5.7h.

UV index

The average daily maximum UV index in Naperville is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 Naperville?

With an average relative humidity of 73%, October is the least humid month.

What is the average humidity in October in Naperville?

The average relative humidity in October in Naperville, Illinois, is 73%.

How many days does it rain in October in Naperville?

In Naperville, in October, during 11 rainfall days, 1.42" (36mm) of precipitation is typically accumulated.

When does it start snowing in Naperville?

October is the first month it typically snows in Naperville. Throughout October, in the average 0.4 snowfall days, it receives 0.16" (4mm) of snow.

How many hours of daylight does Naperville have in October?

The average length of the day in October in Naperville is 11.1h.

How long on average sun shines in October in Naperville?

The average sunshine in October in Naperville is 5.7h.

How high is the UV index in October in Naperville?

The average daily maximum UV index in October in Naperville is 3. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to the Sun's UV rays.

Average temperature in October
Naperville, IL

Average temperature in October - Naperville, IL
  • Average high temperature in October: 60.6°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 (28.4°F).

  • Average low temperature in October: 45.5°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 (17.1°F).

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Average pressure in October
Naperville, IL

Average pressure in October - Naperville, 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
Naperville, IL

Average wind speed in October - Naperville, 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 (6mph).

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Average humidity in October
Naperville, IL

Average humidity in October - Naperville, IL
  • Average humidity in October: 73%

Months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in October
Naperville, IL

Average rainfall in October - Naperville, IL
  • Average rainfall in October: 1.42"

The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is December (0.71").

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Average rainfall days in October
Naperville, IL

Average rainfall days in October - Naperville, IL
  • Average rainfall days in October: 11 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (4.4 days).

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Average snowfall in October
Naperville, IL

Average snowfall in October - Naperville, IL
  • Average snowfall in October: 0.16"

The month with the highest snowfall is January (1.85").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in October
Naperville, IL

Average snowfall days in October - Naperville, IL
  • Average snowfall days in October: 0.4 days

The month with the highest number of snowfall days is January (11.1 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
Naperville, IL

Average daylight in October / Average sunshine in October - Naperville, 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: 5.7h

Months with the most sunshine are July and August (Average sunshine: 10h).
The month with the least sunshine is January (Average sunshine: 3.8h).

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Average sunshine days in October
Naperville, IL

Average sunshine days in October - Naperville, IL
  • Average sunshine days in October: 17.7 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (10.2 days).

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Average UV index in October
Naperville, IL

Average UV index in October - Naperville, IL
  • Average UV index in October: 3

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

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Average cloud cover in October
Naperville, IL

Average cloud cover in October - Naperville, IL
  • Average cloud cover in October: 42

The month with the most cloud cover is January (Cloud cover 60).
Months with the least cloud cover are August and September (Cloud cover 31).

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Average visibility in October
Naperville, IL

Average visibility in October - Naperville, 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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