October weather forecast
Mount Prospect, IL

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Weather in October

October continues the descent into cooler weather for Mount Prospect and the first occurrence of snow after summer — a minimal 0.35in. As the transition from summer to winter continues, the city sees a moderate amount of rainfall. The autumn highlights its full glory this month, with leaf color changes becoming prominent. Cooler days and crisp autumn air in October enhance outdoor activities like hiking or simply enjoying the beautiful fall scenery.

Temperature

Mount Prospect's transition into October involves a shift in temperature, receding from an agreeable 73.2°F (22.9°C) in September to a moderate 59.9°F (15.5°C). In Mount Prospect, October is marked by an average low-temperature of 46.4°F (8°C).

Humidity

The least humid month is October, with an average relative humidity of 72%.

Rainfall

In Mount Prospect, in October, during 13.9 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. In Mount Prospect, during the entire year, the rain falls for 153.3 days and collects up to 30.12" (765mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. October is the first month it typically snows. Throughout October, in the average 0.5 snowfall days, it receives 0.35" (9mm) of snow. Throughout the year, there are 43.6 snowfall days, and 17.95" (456mm) of snow is accumulated.

Daylight

In Mount Prospect, the average length of the day in October is 11h and 4min.
On the first day of October, sunrise is at 6:49 am and sunset at 6:32 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:46 pm CDT.

Sunshine

The average sunshine in October is 5.5h.

UV index

In October, the average daily maximum UV index in Mount Prospect is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum UV index of 2 during October translates into these guidelines:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Updated: Jul 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Mount Prospect in October?

October temperatures vary between a high-temperature of 59.9°F (15.5°C) and a low-temperature of 46.4°F (8°C). In July, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines air temperature and relative humidity, is evaluated at 86°F (30°C).

What is the least humid month?

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

What is the average humidity in October?

In Mount Prospect, the average relative humidity in October is 72%.

How much does it rain in Mount Prospect in October?

In Mount Prospect, in October, it is raining for 13.9 days, with typically 2.6" (66mm) of accumulated precipitation.

When does it start to snow?

October is the first month it typically snows. Throughout October, in the average 0.5 snowfall days, it receives 0.35" (9mm) of snow.

How many hours of daylight does Mount Prospect have in October?

In October, the average day length is 11h and 4min.

What time are sunrise and sunset in October in Mount Prospect?

On the first day of October, sunrise is at 6:49 am and sunset at 6:32 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:46 pm CDT.

How many hours of sunshine does Mount Prospect have in October?

In Mount Prospect, the average sunshine duration in October is 5.5h.

How high is the UV index in October?

In October, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to UV radiation.
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
Mount Prospect, IL

Average temperature in October - Mount Prospect, IL
  • Average high temperature in October: 59.9°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (28.2°F).

  • Average low temperature in October: 46.4°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 (18°F).

Average pressure in October
Mount Prospect, IL

Average pressure in October - Mount Prospect, IL
  • Average pressure in October: 30"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
Mount Prospect, IL

Average wind speed in October - Mount Prospect, IL
  • Average wind speed in October: 9.3mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

Average humidity in October
Mount Prospect, IL

Average humidity in October - Mount Prospect, IL
  • Average humidity in October: 72%

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

Average rainfall in October
Mount Prospect, IL

Average rainfall in October - Mount Prospect, IL
  • Average rainfall in October: 2.6"

The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is December (1.46").

Average rainfall days in October
Mount Prospect, IL

Average rainfall days in October - Mount Prospect, IL
  • Average rainfall days in October: 13.9 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (5.6 days).

Average snowfall in October
Mount Prospect, IL

Average snowfall in October - Mount Prospect, IL
  • Average snowfall in October: 0.35"

The month with the highest snowfall is January (4.96").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in October
Mount Prospect, IL

Average snowfall days in October - Mount Prospect, IL
  • Average snowfall days in October: 0.5 days

The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in October /
Average sunshine in October
Mount Prospect, IL

Average daylight in October / Average sunshine in October - Mount Prospect, 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 3min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in October
Mount Prospect, IL

Average sunshine days in October - Mount Prospect, IL
  • Average sunshine days in October: 14.9 days

The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is June (10.7 days).

Average UV index in October
Mount Prospect, IL

Average UV index in October - Mount Prospect, IL
  • Average UV index in October: 2

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

Average cloud cover in October
Mount Prospect, IL

Average cloud cover in October - Mount Prospect, IL
  • Average cloud cover in October: 43

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in October
Mount Prospect, IL

Average visibility in October - Mount Prospect, 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).

Mount Prospect, Illinois, USA

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