January weather forecastRiverwoods, IL
January
Weather in January
January, the same as December, in Riverwoods, Illinois, is another subzero cold winter month, with an average temperature ranging between max 28.6°F (-1.9°C) and min 18.3°F (-7.6°C).Temperature
Riverwoods's coldest month, January, registers temperatures that range from a high of 28.6°F (-1.9°C) to a low of 18.3°F (-7.6°C).Humidity
The months with the highest humidity in Riverwoods are January and February, with an average relative humidity of 82%.Rainfall
In January, in Riverwoods, the rain falls for 7.5 days. Throughout January, 1.73" (44mm) of precipitation is accumulated. In Riverwoods, during the entire year, the rain falls for 143.1 days and collects up to 26.97" (685mm) of precipitation.Snowfall
Months with snowfall in Riverwoods are January through May, October through December. The months with the most snowfall in Riverwoods, Illinois, are January and February, with an average 5.24" (133mm) of accumulated snow.Daylight
The average length of the day in January is 9h and 31min.On the first day of the month, sunrise is at 7:20 am and sunset at 4:30 pm. On the last day of January, sunrise is at 7:05 am and sunset at 5:04 pm CST.
Sunshine
With an average of 3.7h of sunshine, January has the least sunshine of the year in Riverwoods.UV index
In Riverwoods, the average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In January, an average UV index of 2 transforms into the following instructions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Riverwoods, IL
- Average high temperature in January: 28.6°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in January: 18.3°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in January
Riverwoods, 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
Riverwoods, IL
- Average wind speed in January: 10.9mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in January
Riverwoods, 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
Riverwoods, IL
- Average rainfall in January: 1.73"
The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is November (1.5").
Average rainfall days in January
Riverwoods, IL
- Average rainfall days in January: 7.5 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in January
Riverwoods, IL
- Average snowfall in January: 5.24"
The months with the highest snowfall are January and February (5.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Riverwoods, IL
- Average snowfall days in January: 13.4 days
The month with the highest number of snowfall days is January (13.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Riverwoods, 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 42min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in January
Riverwoods, IL
- Average sunshine days in January: 12.3 days
The month with the most sunshine days is October (17.3 days).
The month with the least sunshine days is February (10.4 days).
Average UV index in January
Riverwoods, 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
Riverwoods, 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 27).
Average visibility in January
Riverwoods, 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).
