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, known for its average high temperature of 29.7°F (-1.3°C) and an average low temperature of 18.9°F (-7.3°C), is the coldest month.Humidity
The months with the highest humidity are January and February, with an average relative humidity of 82%.Rainfall
In Thornton, in January, during 6.8 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. In Thornton, during the entire year, the rain falls for 155.6 days and collects up to 31.3" (795mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. The month with the most snowfall in Thornton is January, when snow falls for 12.6 days and typically aggregates up to 4.53" (115mm) of snow.Daylight
In Thornton, the average length of the day in January is 9h and 35min.On the first day of the month, sunrise is at 7:16 am and sunset at 4:30 pm. On the last day of January, sunrise is at 7:03 am and sunset at 5:04 pm CST.
Sunshine
January has the least sunshine of the year in Thornton, with an average of 3.6h of sunshine.UV index
In Thornton, Illinois, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.Note: A typical high UV index of 2 in January suggests the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What part of the year is the coldest in Thornton?
How cold is January in Thornton?
What are the most humid months in Thornton?
What is the average humidity in January in Thornton?
How much does it rain in Thornton in January?
When does it snow the most in Thornton?
How many days does it snow in January in Thornton?
How many hours of daylight does Thornton have in January?
What time are sunrise and sunset in January in Thornton?
What is the month with the least sunshine in Thornton?
How long on average sun shines in January in Thornton?
How high is the UV index in January in Thornton?
Average temperature in January
Thornton, IL
- Average high temperature in January: 29.7°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in January: 18.9°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in January
Thornton, 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
Thornton, IL
- Average wind speed in January: 10.2mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in January
Thornton, IL
- Average humidity in January: 82%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in January
Thornton, IL
- Average rainfall in January: 1.77"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is December (1.54").
Average rainfall days in January
Thornton, IL
- Average rainfall days in January: 6.8 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is February (6.1 days).
Average snowfall in January
Thornton, IL
- Average snowfall in January: 4.53"
The month with the highest snowfall is January (4.53").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Thornton, IL
- Average snowfall days in January: 12.6 days
The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Thornton, IL
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 6min).
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 August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in January
Thornton, IL
- Average sunshine days in January: 13 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is April (10.2 days).
Average UV index in January
Thornton, IL
- Average UV index in January: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Thornton, IL
- Average cloud cover in January: 62
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in January
Thornton, IL
- Average visibility in January: 5mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Thornton, Illinois, USA
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