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
October brings a minor decrease, with the average high-temperature reducing from a moderately hot 79.9°F (26.6°C) in September to a refreshing 67.1°F (19.5°C). Throughout October, the average low-temperature records at a frosty 49.1°F (9.5°C).Humidity
October is the least humid month, with an average relative humidity of 71%.Rainfall
In Chester, during October, the rain falls for 10.5 days and regularly aggregates up to 2.87" (73mm) of precipitation. In Chester, Illinois, during the entire year, the rain falls for 156.4 days and collects up to 34.25" (870mm) 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 0.1 snowfall days, it receives 0.16" (4mm) of snow. Throughout the year, there are 16 snowfall days, and 6.89" (175mm) of snow is accumulated.Daylight
In Chester, Illinois, the average length of the day in October is 11h and 12min.On the first day of October, sunrise is at 6:55 am and sunset at 6:41 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 6:01 pm CDT.
Sunshine
In Chester, the average sunshine in October is 6.4h.UV index
In Chester, the average daily maximum UV index in October is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: In October, the maximum UV index of 3 transforms into these recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
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 much does it rain in October?
When does it start to snow?
How many hours of daylight does Chester have in October?
When are sunrise and sunset in October?
How many hours of sunshine does Chester have in October?
What is the UV index reading in October?
Average temperature in October
Chester, IL
- Average high temperature in October: 67.1°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).
- Average low temperature in October: 49.1°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in October
Chester, IL
- Average pressure in October: 30.04"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in October
Chester, IL
- Average wind speed in October: 7.7mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in October
Chester, IL
- Average humidity in October: 71%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in October
Chester, IL
- Average rainfall in October: 2.87"
The wettest month (with the highest rainfall) is April (4.13").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in October
Chester, IL
- Average rainfall days in October: 10.5 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in October
Chester, IL
- Average snowfall in October: 0.16"
The month with the highest snowfall is February (2.56").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in October
Chester, IL
- Average snowfall days in October: 0.1 days
The month with the highest number of snowfall days is February (5.2 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
Chester, IL
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in October: 6h and 2min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in October
Chester, IL
- Average sunshine days in October: 18.9 days
The month with the most sunshine days is October (18.9 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in October
Chester, IL
- Average UV index in October: 3
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in October
Chester, IL
- Average cloud cover in October: 32
The months with the most cloud cover are January and February (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in October
Chester, 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).
Chester, Illinois, USA
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