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
January, noted for its average high-temperature of 36°F (2.2°C) and an average low-temperature of 23.4°F (-4.8°C), is considered the coldest month.Humidity
The average relative humidity in January is 78%.Rainfall
In January, the rain falls for 9.3 days. Throughout January, 2.52" (64mm) of precipitation is accumulated. Throughout the year, there are 158.3 rainfall days, and 35.12" (892mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. January is the month with the most snowfall. Snow falls for 6.3 days and accumulates 2.6" (66mm) of snow.Daylight
In Willow Hill, the average length of the day in January is 9h and 48min.On the first day of January, sunrise is at 7:10 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 5:11 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 4.2h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for average individuals.Note: In January, the average maximum UV index of 2 translates into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. It's recommended to limit sun exposure when its radiation is at its peak during midday. During bright days, sunglasses that offer UVA and UVB defense are recommended. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
How cold is January?
What is the average humidity in January?
How many days does it rain in January?
When does it snow the most?
How many days does it snow in January?
How many hours of daylight does Willow Hill have in January?
When is the sunrise / sunset in January?
What is the month with the least sunshine?
How many hours of sunshine does Willow Hill have in January?
When is the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Willow Hill, IL
- Average high temperature in January: 36°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in January: 23.4°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in January
Willow Hill, 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
Willow Hill, IL
- Average wind speed in January: 10.3mph
The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in January
Willow Hill, IL
- Average humidity in January: 78%
The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is October (70%).
Average rainfall in January
Willow Hill, IL
- Average rainfall in January: 2.52"
The wettest month (with the highest rainfall) is April (5.04").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in January
Willow Hill, IL
- Average rainfall days in January: 9.3 days
The month with the highest number of rainy days is May (18.7 days).
The months with the least rainy days are January and February (9.3 days).
Average snowfall in January
Willow Hill, IL
- Average snowfall in January: 2.6"
The month with the highest snowfall is January (2.6").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Willow Hill, IL
- Average snowfall days in January: 6.3 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 January /
Average sunshine in January
Willow Hill, IL
- Average daylight in January: 9h and 5min
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 January: 4h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in January
Willow Hill, IL
- Average sunshine days in January: 16.9 days
The month with the most sunshine days is October (18.2 days).
The month with the least sunshine days is May (10.1 days).
Average UV index in January
Willow Hill, IL
- Average UV index in January: 2
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 January
Willow Hill, IL
- Average cloud cover in January: 54
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in January
Willow Hill, 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).
Willow Hill, Illinois, USA
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