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 is the coldest month of the year, registering average temperatures as high as 35.4°F (1.9°C) and as low as 22.6°F (-5.2°C).Humidity
The average relative humidity in January in Hillsboro is 78%.Rainfall
In Hillsboro, Illinois, in January, during 7 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. Throughout the year, there are 138.5 rainfall days, and 24.33" (618mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall in Hillsboro. In Hillsboro, in January, snow falls for 6.2 days, with typically accumulated 1.54" (39mm) of snow. Throughout the year, there are 20.6 snowfall days, and 6.3" (160mm) of snow is accumulated.Daylight
In January, the average length of the day in Hillsboro, Illinois, is 9h and 47min.On the first day of the month, sunrise is at 7:17 am and sunset at 4:45 pm. On the last day of January, in Hillsboro, sunrise is at 7:05 am and sunset at 5:17 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 4.3h of sunshine.UV index
The months with the lowest UV index in Hillsboro are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In January, a daily UV index of 2 turns into the following recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Always opt for UVA and UVB-resistant sunglasses on radiant days. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Hillsboro?
How cold is January in Hillsboro?
What is the average humidity in January in Hillsboro?
How many days does it rain in January in Hillsboro?
How many days does it snow in January in Hillsboro?
How many hours of daylight does Hillsboro have in January?
What time are sunrise and sunset in January in Hillsboro?
What is the month with the least sunshine in Hillsboro?
How long on average sun shines in January in Hillsboro?
What are the months with the lowest UV index in Hillsboro?
What is the UV index intensity in January in Hillsboro?
Average temperature in January
Hillsboro, IL
- Average high temperature in January: 35.4°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in January: 22.6°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in January
Hillsboro, 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 (29.92"Hg).
Average wind speed in January
Hillsboro, IL
- Average wind speed in January: 10.3mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity in January
Hillsboro, IL
- Average humidity in January: 78%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Hillsboro, IL
- Average rainfall in January: 1.46"
The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is February (1.34").
Average rainfall days in January
Hillsboro, IL
- Average rainfall days in January: 7 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (7 days).
Average snowfall in January
Hillsboro, IL
- Average snowfall in January: 1.54"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Hillsboro, IL
- Average snowfall days in January: 6.2 days
The month with the highest number of snowfall days is January (6.2 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
Hillsboro, 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 2min
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 18min).
Average sunshine days in January
Hillsboro, IL
- Average sunshine days in January: 19.3 days
The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in January
Hillsboro, 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
Hillsboro, IL
- Average cloud cover in January: 53
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility in January
Hillsboro, IL
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Hillsboro, Illinois, USA
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