January weather forecastWestmont, IL
January
Weather in January
January, like December, is another subzero cold winter month in Westmont, Illinois, with an average temperature ranging between min 17.1°F (-8.3°C) and max 28.8°F (-1.8°C).Temperature
Westmont experiences its lowest average temperatures in January, reaching a peak of 28.8°F (-1.8°C) and a minimum of 17.1°F (-8.3°C).Humidity
January and February, with an average relative humidity of 82%, are the most humid months.Rainfall
In January, the rain falls for 4.3 days. Throughout January, 0.67" (17mm) of precipitation is accumulated. In Westmont, during the entire year, the rain falls for 118.5 days and collects up to 13.74" (349mm) of precipitation.Snowfall
Months with snowfall in Westmont are January through April, October through December. In Westmont, during January, snow falls for 9.7 days and regularly aggregates up to 1.81" (46mm) of snow. Throughout the year, there are 34.9 snowfall days, and 7.2" (183mm) of snow is accumulated.Daylight
In January, the average length of the day is 9h and 33min.On the first day of January, sunrise is at 7:19 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 5:05 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 3.7h of sunshine.UV index
The month with the lowest UV index is January, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum UV index of 1 in January translates 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. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Westmont, IL
- Average high temperature in January: 28.8°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in January: 17.1°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in January
Westmont, 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
Westmont, IL
- Average wind speed in January: 9.7mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in January
Westmont, 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 (72%).
Average rainfall in January
Westmont, IL
- Average rainfall in January: 0.67"
The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is December (0.63").
Average rainfall days in January
Westmont, IL
- Average rainfall days in January: 4.3 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is February (4.2 days).
Average snowfall in January
Westmont, IL
- Average snowfall in January: 1.81"
The month with the highest snowfall is February (2.28").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Westmont, IL
- Average snowfall days in January: 9.7 days
The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Westmont, IL
- Average daylight in January: 9h and 36min
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 42min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in January
Westmont, IL
- Average sunshine days in January: 19.7 days
The month with the most sunshine days is December (20.7 days).
The month with the least sunshine days is July (11.8 days).
Average UV index in January
Westmont, IL
- Average UV index in January: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in January
Westmont, IL
- Average cloud cover in January: 61
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in January
Westmont, 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).
