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
The onset of October entails a temperature shift, as the average high-temperature decreases from a moderately hot 77.9°F (25.5°C) in September to an enjoyable 64.8°F (18.2°C). Chesterfield observes an average low-temperature of 48.2°F (9°C) during October.Humidity
With an average relative humidity of 71%, October is the least humid month in Chesterfield.Rainfall
In October, the rain falls for 9.6 days. Throughout October, 1.73" (44mm) of precipitation is accumulated. In Chesterfield, during the entire year, the rain falls for 138.2 days and collects up to 23.31" (592mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Chesterfield, the average length of the day in October is 11h and 10min.On the first day of October, sunrise is at 6:57 am and sunset at 6:42 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 5:59 pm CDT.
Sunshine
In Chesterfield, the average sunshine in October is 6.2h.UV index
In Chesterfield, Illinois, the average daily maximum UV index in October is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In October, an average UV index of 3 transforms into the following instructions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in October?
What is the least humid month?
What is the average humidity in October?
How many days does it rain in October?
When it does not snow?
Does it snow in October?
How many hours of daylight does Chesterfield have in October?
What time are sunrise and sunset in October in Chesterfield?
How many hours of sunshine does Chesterfield have in October?
What is the UV index reading in October?
Average temperature in October
Chesterfield, IL
- Average high temperature in October: 64.8°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.9°F).
- Average low temperature in October: 48.2°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in October
Chesterfield, IL
- Average pressure in October: 30.03"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in October
Chesterfield, IL
- Average wind speed in October: 8.6mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in October
Chesterfield, IL
- Average humidity in October: 71%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in October
Chesterfield, IL
- Average rainfall in October: 1.73"
The wettest month (with the highest rainfall) is June (3.07").
The driest months (with the least rainfall) are January and February (1.22").
Average rainfall days in October
Chesterfield, IL
- Average rainfall days in October: 9.6 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in October
Chesterfield, IL
- Average snowfall in October: 0"
The month with the highest snowfall is February (2.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in October
Chesterfield, IL
- Average snowfall days in October: 0.1 days
The month with the highest number of snowfall days is February (6.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
Chesterfield, IL
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in October: 6h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in October
Chesterfield, IL
- Average sunshine days in October: 19.8 days
The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is May (11.1 days).
Average UV index in October
Chesterfield, 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, February, November and December (UV index 2).
Average cloud cover in October
Chesterfield, IL
- Average cloud cover in October: 33
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility in October
Chesterfield, 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).
Chesterfield, Illinois, USA
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