October weather forecast
Naperville, IL

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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

Autumn is in full swing in Naperville during October, with average temperatures dipping noticeably to a high of 60.6°F (15.9°C) and a low of 45.5°F (7.5°C). Step outside and the city’s atmosphere is filled with the faint smell of dry leaves. The days are crisp, nights are cool, and the city is awash with fall colors.

Temperature

The start of October in Naperville involves a temperature drop, moving from a moderately hot 73.8°F (23.2°C) in September to a moderate 60.6°F (15.9°C). Naperville records an average low-temperature of 45.5°F (7.5°C) throughout the month of October.

Humidity

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

Rainfall

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

Snowfall

January through April, October through December are months with snowfall. 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

The average length of the day in October is 11h and 4min.
On the first day of the month, sunrise is at 6:50 am and sunset at 6:33 pm. On the last day of October, sunrise is at 7:24 am and sunset at 5:47 pm CDT.

Sunshine

In Naperville, the average sunshine in October is 5.7h.

UV index

The average daily maximum UV index in October is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In October, a daily maximum UV index of 3 leads to the following instructions:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in October?

The high-temperature during October is 60.6°F (15.9°C) and the low-temperature is 45.5°F (7.5°C). In July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is computed to be 87.8°F (31°C).

What is the least humid month?

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

What is the average humidity in October?

In October, the average relative humidity is 73%.

How much does it rain in October?

In Naperville, in October, it is raining for 11 days, with typically 1.42" (36mm) of accumulated precipitation.

When does it start snowing?

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

What is the average length of the day in October?

The average day length in October is 11h and 4min.

When is the sunrise / sunset in October?

In October, on the first day of the month, sunrise is at 6:50 am and sunset at 6:33 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:47 pm CDT.

How long on average sun shines in October?

In Naperville, the average sunshine duration in October is 5.7h.

What is the UV index reading in October?

In Naperville, the average daily maximum UV index in October is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability 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 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).

Average pressure in October
Naperville, IL

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

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

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).

Average humidity in October
Naperville, IL

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

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

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").

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).

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").
The months with the least snowfall are May, June, July, August and September (0").

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).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in October /
Average sunshine in October
Naperville, IL

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

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

  • Average sunshine in October: 5h and 4min

The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

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).

Average UV index in October
Naperville, IL

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

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

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).
The months with the least cloud cover are August and September (Cloud cover 31).

Average visibility in October
Naperville, IL

Average visibility in October - Naperville, 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).

Naperville, Illinois, USA

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