January weather forecastMcHenry, IL
January
Weather in January
January, the same as December, in McHenry, Illinois, is a freezing cold winter month, with an average temperature ranging between max 26.6°F (-3°C) and min 14.9°F (-9.5°C).Temperature
In McHenry, January records the lowest average temperatures, peaking at 26.6°F (-3°C) and reaching a low of 14.9°F (-9.5°C).Humidity
January and February, with an average relative humidity of 85%, are the most humid months.Rainfall
In McHenry, in January, it is raining for 5.6 days, with typically 1.54" (39mm) of accumulated precipitation. In McHenry, during the entire year, the rain falls for 152.4 days and collects up to 28.07" (713mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. The month with the most snowfall is January, when snow falls for 13.3 days and typically aggregates up to 5.16" (131mm) of snow.Daylight
In McHenry, the average length of the day in January is 9h and 30min.On the first day of the month, sunrise is at 7:22 am and sunset at 4:30 pm. On the last day of January, sunrise is at 7:07 am and sunset at 5:05 pm CST.
Sunshine
January has the least sunshine of the year in McHenry, 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 in McHenry. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In January, a regular UV index of 1 translates into these guidelines:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
McHenry, IL
- Average high temperature in January: 26.6°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (26.6°F).
- Average low temperature in January: 14.9°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure in January
McHenry, 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
McHenry, IL
- Average wind speed in January: 10mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in January
McHenry, IL
- Average humidity in January: 85%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is October (76%).
Average rainfall in January
McHenry, IL
- Average rainfall in January: 1.54"
The wettest month (with the highest rainfall) is June (3.58").
The driest month (with the least rainfall) is December (1.34").
Average rainfall days in January
McHenry, IL
- Average rainfall days in January: 5.6 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in January
McHenry, IL
- Average snowfall in January: 5.16"
The month with the highest snowfall is January (5.16").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
McHenry, IL
- Average snowfall days in January: 13.3 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
McHenry, 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 6min).
- Average sunshine in January: 3h and 42min
The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in January
McHenry, IL
- Average sunshine days in January: 13.7 days
The month with the most sunshine days is November (16 days).
The month with the least sunshine days is June (10.2 days).
Average UV index in January
McHenry, IL
- Average UV index in January: 1
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
McHenry, 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 August and September (Cloud cover 31).
Average visibility in January
McHenry, IL
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
