January weather forecastWilmette, IL
January
Weather in January
January, the same as December, in Wilmette, Illinois, is a freezing cold winter month, with an average temperature ranging between min 20.5°F (-6.4°C) and max 29.1°F (-1.6°C).Temperature
January is the coldest month, exhibiting average temperatures of 29.1°F (-1.6°C) at the peak and 20.5°F (-6.4°C) at the base.Humidity
The most humid month in Wilmette is January, with an average relative humidity of 82%.Rainfall
In Wilmette, in January, it is raining for 6.8 days, with typically 1.61" (41mm) of accumulated precipitation. In Wilmette, during the entire year, the rain falls for 154.1 days and collects up to 33.31" (846mm) of precipitation.Snowfall
Months with snowfall in Wilmette, Illinois, are January through April, October through December. January is the month with the most snowfall. Snow falls for 11.6 days and accumulates 3.58" (91mm) of snow.Daylight
In Wilmette, Illinois, the average length of the day in January is 9h and 32min.On the first day of the month, sunrise is at 7:19 am and sunset at 4:29 pm. On the last day of January, sunrise is at 7:04 am and sunset at 5:03 pm CST.
Sunshine
With an average of 3.6h of sunshine, January has the least sunshine of the year in Wilmette.UV index
In January, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 2 during January translates into the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Experience reduced UV exposure by about half when donning a wide-brim hat. 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
Average temperature in January
Wilmette, IL
- Average high temperature in January: 29.1°F
The warmest month (with the highest average high temperature) is August (77°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in January: 20.5°F
The months with the highest average low temperature are July and August (68°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in January
Wilmette, IL
- Average pressure in January: 30.1"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Wilmette, IL
- Average wind speed in January: 12.7mph
The windiest month (with the highest average wind speed) is January (12.7mph).
The calmest months (with the lowest average wind speed) are July and August (8mph).
Average humidity in January
Wilmette, IL
- Average humidity in January: 82%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in January
Wilmette, IL
- Average rainfall in January: 1.61"
The wettest month (with the highest rainfall) is June (4.49").
The driest month (with the least rainfall) is December (1.38").
Average rainfall days in January
Wilmette, IL
- Average rainfall days in January: 6.8 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (5.6 days).
Average snowfall in January
Wilmette, IL
- Average snowfall in January: 3.58"
The month with the highest snowfall is January (3.58").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Wilmette, IL
- Average snowfall days in January: 11.6 days
The month with the highest number of snowfall days is January (11.6 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
Wilmette, IL
- Average daylight in January: 9h and 30min
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 36min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in January
Wilmette, IL
- Average sunshine days in January: 12 days
The month with the most sunshine days is December (15.3 days).
The months with the least sunshine days are June and July (10.9 days).
Average UV index in January
Wilmette, IL
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Wilmette, 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 July and August (Cloud cover 27).
Average visibility in January
Wilmette, 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).
