January weather forecastPreston Heights, IL
January
Weather in January
January, the same as December, in Preston Heights, Illinois, is a freezing cold winter month, with an average temperature ranging between min 17.4°F (-8.1°C) and max 29.3°F (-1.5°C).Temperature
Preston Heights's coldest temperatures are experienced in January, with average high temperatures of 29.3°F (-1.5°C) and lows of 17.4°F (-8.1°C).Humidity
In Preston Heights, the average relative humidity in January is 82%.Rainfall
In Preston Heights, in January, it is raining for 6.8 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, there are 153.6 rainfall days, and 32.72" (831mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Preston Heights. The month with the most snowfall is January, when snow falls for 11.9 days and typically aggregates up to 4.33" (110mm) of snow.Daylight
In January, the average length of the day is 9h and 35min.On the first day of January in Preston Heights, sunrise is at 7:18 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 5:06 pm CST.
Sunshine
The month with the least sunshine is January, with an average of 3.7h of sunshine.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for average individuals.Note: In January, the maximum UV index of 1 suggests this advice:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Preston Heights, IL
- Average high temperature in January: 29.3°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 (29.3°F).
- Average low temperature in January: 17.4°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in January
Preston Heights, IL
- Average pressure in January: 30.12"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Preston Heights, IL
- Average wind speed in January: 9.5mph
The windiest month (with the highest average wind speed) is April (9.7mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in January
Preston Heights, IL
- Average humidity in January: 82%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in January
Preston Heights, IL
- Average rainfall in January: 1.85"
The wettest month (with the highest rainfall) is May (4.41").
The driest month (with the least rainfall) is February (1.61").
Average rainfall days in January
Preston Heights, IL
- Average rainfall days in January: 6.8 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in January
Preston Heights, IL
- Average snowfall in January: 4.33"
The month with the highest snowfall is January (4.33").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Preston Heights, IL
- Average snowfall days in January: 11.9 days
The month with the highest number of snowfall days is January (11.9 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
Preston Heights, IL
- Average daylight in January: 9h and 36min
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 42min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in January
Preston Heights, IL
- Average sunshine days in January: 14.4 days
The month with the most sunshine days is November (18.1 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in January
Preston Heights, IL
- Average UV index in January: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Preston Heights, IL
- Average cloud cover in January: 60
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility in January
Preston Heights, IL
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
