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
In Williamson, entering October brings a temperature decrement, reducing from September's warm 77.9°F (25.5°C) to a comfortable 65.3°F (18.5°C). During October, an average low-temperature of 48.4°F (9.1°C) is observed.Humidity
The least humid month is October, with an average relative humidity of 71%.Rainfall
In Williamson, in October, during 8.5 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. In Williamson, during the entire year, the rain falls for 121.4 days and collects up to 14.72" (374mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In October, the average length of the day is 11h and 10min.On the first day of the month, sunrise is at 6:55 am and sunset at 6:41 pm. On the last day of October, sunrise is at 7:26 am and sunset at 5:59 pm CDT.
Sunshine
In Williamson, the average sunshine in October is 6.2h.UV index
In Williamson, the average daily maximum UV index in October is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The average daily UV index of 3 in October transforms into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average October temperature?
What is the least humid month?
What is the average humidity in October?
How much does it rain in October?
When it does not snow?
Does it snow in October?
What is the average length of the day in October in Williamson?
What time are sunrise and sunset in October?
How many hours of sunshine does Williamson have in October?
What is the UV index intensity in October?
Average temperature in October
Williamson, IL
- Average high temperature in October: 65.3°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in October: 48.4°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in October
Williamson, IL
- Average pressure in October: 30.03"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in October
Williamson, IL
- Average wind speed in October: 8.5mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in October
Williamson, IL
- Average humidity in October: 71%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in October
Williamson, IL
- Average rainfall in October: 1.1"
The wettest month (with the highest rainfall) is June (1.89").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in October
Williamson, IL
- Average rainfall days in October: 8.5 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in October
Williamson, IL
- Average snowfall in October: 0"
The month with the highest snowfall is December (0.98").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in October
Williamson, IL
- Average snowfall days in October: 0.1 days
The month with the highest number of snowfall days is January (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
Williamson, 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 months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in October
Williamson, IL
- Average sunshine days in October: 19.7 days
The month with the most sunshine days is January (20.9 days).
The month with the least sunshine days is July (12.5 days).
Average UV index in October
Williamson, 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
Williamson, IL
- Average cloud cover in October: 33
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are June, July, August and September (Cloud cover 29).
Average visibility in October
Williamson, 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).
Williamson, Illinois, USA
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