Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
With average high and low temperatures of 37.9°F (3.3°C) and 24.8°F (-4°C) respectively, January is Mount Vernon's coldest month.Humidity
The average relative humidity in January is 77%.Rainfall
In Mount Vernon, in January, it is raining for 7.5 days, with typically 1.77" (45mm) of accumulated precipitation. Throughout the year, in Mount Vernon, there are 145.8 rainfall days, and 29.13" (740mm) of precipitation is accumulated.Snowfall
Months with snowfall in Mount Vernon, Illinois, are January through April, November and December. In Mount Vernon, during January, snow falls for 4.8 days and regularly aggregates up to 1.65" (42mm) of snow. Throughout the year, there are 15.4 snowfall days, and 5.87" (149mm) of snow is accumulated.Daylight
In January, the average length of the day is 9h and 52min.On the first day of the month, sunrise is at 7:12 am and sunset at 4:45 pm. On the last day of January, in Mount Vernon, sunrise is at 7:01 am and sunset at 5:16 pm CST.
Sunshine
The month with the least sunshine is January, with an average of 4.5h of sunshine.UV index
January, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 2 in January translates into this advice:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Mount Vernon?
Is January cold in Mount Vernon?
What is the average humidity in January in Mount Vernon?
How much does it rain in Mount Vernon in January?
How many days does it snow in January in Mount Vernon?
How many hours of daylight does Mount Vernon have in January?
When is the sunrise / sunset in January in Mount Vernon?
What is the month with the least sunshine in Mount Vernon?
How long on average sun shines in January in Mount Vernon?
When is the lowest UV index in Mount Vernon?
What is the UV index reading in January in Mount Vernon?
Average temperature in January
Mount Vernon, IL
- Average high temperature in January: 37.9°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 January: 24.8°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 January
Mount Vernon, IL
- Average pressure in January: 30.16"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 January
Mount Vernon, IL
- Average wind speed in January: 9.9mph
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 January
Mount Vernon, IL
- Average humidity in January: 77%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Mount Vernon, IL
- Average rainfall in January: 1.77"
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 January
Mount Vernon, IL
- Average rainfall days in January: 7.5 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 January
Mount Vernon, IL
- Average snowfall in January: 1.65"
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 January
Mount Vernon, IL
- Average snowfall days in January: 4.8 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 January /
Average sunshine in January
Mount Vernon, IL
- Average daylight in January: 9h and 5min
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 January: 4h and 3min
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 January
Mount Vernon, IL
- Average sunshine days in January: 19.3 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 January
Mount Vernon, IL
- Average UV index in January: 2
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 January
Mount Vernon, IL
- Average cloud cover in January: 51
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 January
Mount Vernon, IL
- Average visibility in January: 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).
Mount Vernon, Illinois, USA
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