Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average snowfall in October
- Average snowfall days in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
Transition from September to October is accompanied by a temperature drop, with average high-temperatures decreasing from a warm 74.3°F (23.5°C) to a mild 60.6°F (15.9°C). In Lemont, an average nighttime temperature of 45.5°F (7.5°C) is expected during October.Humidity
October is the least humid month, with an average relative humidity of 73%.Rainfall
In October, the rain falls for 11.9 days. Throughout October, 2.01" (51mm) of precipitation is accumulated. Throughout the year, in Lemont, there are 145.4 rainfall days, and 22.83" (580mm) of precipitation is accumulated.Snowfall
January through May, 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 0.28" (7mm) of snow. Throughout the year, there are 44.4 snowfall days, and 11.93" (303mm) of snow is accumulated.Daylight
In Lemont, the average length of the day in October is 11h and 4min.On the first day of the month, sunrise is at 6:49 am and sunset at 6:33 pm. On the last day of October, sunrise is at 7:23 am and sunset at 5:47 pm CDT.
Sunshine
The average sunshine in October in Lemont is 5.7h.UV index
In October, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum daily UV index of 3 during October morphs into the following directions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. During bright days, sunglasses that offer UVA and UVB defense are recommended. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in October?
What is the least humid month?
What is the average humidity in October?
How many days does it rain in October?
When does it start to snow?
How many hours of daylight does Lemont have in October?
When are sunrise and sunset in October in Lemont?
How many hours of sunshine does Lemont have in October?
What is the UV index reading in October?
Average temperature in October
Lemont, IL
- Average high temperature in October: 60.6°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in October: 45.5°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in October
Lemont, 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
Lemont, 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
Lemont, 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
Lemont, IL
- Average rainfall in October: 2.01"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is December (1.06").
Average rainfall days in October
Lemont, IL
- Average rainfall days in October: 11.9 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in October
Lemont, IL
- Average snowfall in October: 0.28"
The month with the highest snowfall is January (3.11").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in October
Lemont, IL
- Average snowfall days in October: 0.4 days
The month with the highest number of snowfall days is January (12.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
Lemont, 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: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in October
Lemont, IL
- Average sunshine days in October: 16.3 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in October
Lemont, IL
- Average UV index in October: 3
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
Lemont, IL
- Average cloud cover in October: 41
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in October
Lemont, IL
- Average visibility in October: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Lemont, Illinois, USA
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