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
During the coldest month, January, temperatures average a high of 27.3°F (-2.6°C) and a low of 15.4°F (-9.2°C).Humidity
The most humid month in Sleepy Hollow is January, with an average relative humidity of 84%.Rainfall
In January, the rain falls for 5.9 days. Throughout January, 1.26" (32mm) of precipitation is accumulated. In Sleepy Hollow, during the entire year, the rain falls for 149.2 days and collects up to 24.02" (610mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. January is the month with the most snowfall in Sleepy Hollow. Snow falls for 12.9 days and accumulates 3.62" (92mm) of snow.Daylight
The average length of the day in January is 9h and 32min.On the first day of January, sunrise is at 7:21 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 5:05 pm CST.
Sunshine
With an average of 3.6h of sunshine, January has the least sunshine of the year in Sleepy Hollow, Illinois.UV index
The months with the lowest UV index in Sleepy Hollow are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: An average UV index of 1 in January transforms into this advice:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Sleepy Hollow?
How cold is it in Sleepy Hollow in January?
What is the most humid month in Sleepy Hollow?
What is the average humidity in January in Sleepy Hollow?
How many days does it rain in January in Sleepy Hollow?
What is the snowiest month in Sleepy Hollow?
How many days does it snow in January in Sleepy Hollow?
What is the average length of the day in January in Sleepy Hollow?
When is the sunrise / sunset in January in Sleepy Hollow?
What is the month with the least sunshine in Sleepy Hollow?
How many hours of sunshine does Sleepy Hollow have in January?
What is the month with the lowest UV index in Sleepy Hollow?
What is the UV index intensity in January in Sleepy Hollow?
Average temperature in January
Sleepy Hollow, IL
- Average high temperature in January: 27.3°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in January: 15.4°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure in January
Sleepy Hollow, IL
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Sleepy Hollow, IL
- Average wind speed in January: 9.9mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in January
Sleepy Hollow, IL
- Average humidity in January: 84%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (75%).
Average rainfall in January
Sleepy Hollow, IL
- Average rainfall in January: 1.26"
The wettest month (with the highest rainfall) is June (3.03").
The driest month (with the least rainfall) is December (1.1").
Average rainfall days in January
Sleepy Hollow, IL
- Average rainfall days in January: 5.9 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in January
Sleepy Hollow, IL
- Average snowfall in January: 3.62"
The month with the highest snowfall is January (3.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Sleepy Hollow, IL
- Average snowfall days in January: 12.9 days
The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Sleepy Hollow, IL
- Average daylight in January: 9h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January: 3h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in January
Sleepy Hollow, IL
- Average sunshine days in January: 14.2 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in January
Sleepy Hollow, IL
- Average UV index in January: 1
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Sleepy Hollow, IL
- Average cloud cover in January: 62
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility in January
Sleepy Hollow, IL
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
Sleepy Hollow, Illinois, USA
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