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
Stepping into October, DeKalb observes a temperature decline, with the average high falling from September's agreeable 73°F (22.8°C) to a moderate 59.9°F (15.5°C). An average temperature of 44.1°F (6.7°C) is recorded during the nights in October.Humidity
The months with the lowest humidity are April and October, with an average relative humidity of 75%.Rainfall
In October, the rain falls for 13.1 days. Throughout October, 2.68" (68mm) of precipitation is accumulated. Throughout the year, there are 152.6 rainfall days, and 32.09" (815mm) 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 0.8 snowfall days, it receives 0.2" (5mm) of snow. In DeKalb, during the entire year, snow falls for 44.3 days and aggregates up to 17.87" (454mm) of snow.Daylight
The average length of the day in October is 11h and 4min.On the first day of October, sunrise is at 6:52 am and sunset at 6:36 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 5:49 pm CDT.
Sunshine
In DeKalb, Illinois, the average sunshine in October is 5.4h.UV index
In DeKalb, the average daily maximum UV index in October is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In October, an average UV index of 2 transforms into the following instructions:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. When the Sun is at its strongest around midday, find shade and limit exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are October temperatures in DeKalb?
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 snowing?
What is the average length of the day in October in DeKalb?
What time are sunrise and sunset in October?
How many hours of sunshine does DeKalb have in October?
How high is the UV index in October?
Average temperature in October
DeKalb, IL
- Average high temperature in October: 59.9°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in October: 44.1°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in October
DeKalb, 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
DeKalb, IL
- Average wind speed in October: 8.9mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in October
DeKalb, IL
- Average humidity in October: 75%
The months with the highest relative humidity are January and July (85%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall in October
DeKalb, IL
- Average rainfall in October: 2.68"
The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is February (1.65").
Average rainfall days in October
DeKalb, IL
- Average rainfall days in October: 13.1 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (4.7 days).
Average snowfall in October
DeKalb, IL
- Average snowfall in October: 0.2"
The month with the highest snowfall is January (5.55").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in October
DeKalb, IL
- Average snowfall days in October: 0.8 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
DeKalb, 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 2min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in October
DeKalb, IL
- Average sunshine days in October: 15.4 days
The month with the most sunshine days is November (17.2 days).
The months with the least sunshine days are June and July (10.3 days).
Average UV index in October
DeKalb, IL
- Average UV index in October: 2
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in October
DeKalb, IL
- Average cloud cover in October: 43
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 35).
Average visibility in October
DeKalb, IL
- Average visibility in October: 6mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
DeKalb, Illinois, USA
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