October weather forecastMount Vernon, IL
October
Weather in October
October, the same as September, is another enjoyable autumn month in Mount Vernon, Illinois, with an average temperature ranging between max 66.4°F (19.1°C) and min 49.1°F (9.5°C).Temperature
Start of October brings a shift in the average high-temperature, falling from September's warm 79°F (26.1°C) to a refreshing 66.4°F (19.1°C). October nights are marked by an average temperature drop to a chilly 49.1°F (9.5°C).Humidity
With an average relative humidity of 71%, October is the least humid month.Rainfall
In Mount Vernon, in October, it is raining for 9.5 days, with typically 2.09" (53mm) of accumulated precipitation. In Mount Vernon, during the entire year, the rain falls for 145.8 days and collects up to 29.13" (740mm) of precipitation.Snowfall
In Mount Vernon, Illinois, snow does not fall in May through October.Daylight
In October, the average length of the day in Mount Vernon is 11h and 11min.On the first day of October in Mount Vernon, sunrise is at 6:52 am and sunset at 6:38 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 5:56 pm CDT.
Sunshine
In October, the average sunshine in Mount Vernon is 6.5h.UV index
In Mount Vernon, the average daily maximum UV index in October is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: A maximum high daily UV index of 3 during October translates into the following directions:
Put precautions into practice - Protective measures against sun-induced damage are advised. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Mount Vernon, IL
- Average high temperature in October: 66.4°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in October: 49.1°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in October
Mount Vernon, 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
Mount Vernon, IL
- Average wind speed in October: 8.3mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.9mph).
Average humidity in October
Mount Vernon, IL
- Average humidity in October: 71%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in October
Mount Vernon, IL
- Average rainfall in October: 2.09"
The wettest month (with the highest rainfall) is April (3.78").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in October
Mount Vernon, IL
- Average rainfall days in October: 9.5 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in October
Mount Vernon, IL
- Average snowfall in October: 0"
The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in October
Mount Vernon, IL
- Average snowfall days in October: 0 days
The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in October /
Average sunshine in October
Mount Vernon, IL
- Average daylight in October: 11h and 12min
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 30min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in October
Mount Vernon, IL
- Average sunshine days in October: 20.3 days
The month with the most sunshine days is October (20.3 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in October
Mount Vernon, 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, November and December (UV index 2).
Average cloud cover in October
Mount Vernon, IL
- Average cloud cover in October: 32
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in October
Mount Vernon, 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).
