Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
The coldest period is January, when temperatures fluctuate between an average high of 27°F (-2.8°C) and a low of 15.1°F (-9.4°C).Humidity
The months with the highest humidity in Crystal Lake are January and February, with an average relative humidity of 85%.Rainfall
In Crystal Lake, during January, the rain falls for 5.5 days and regularly aggregates up to 1.1" (28mm) of precipitation. In Crystal Lake, during the entire year, the rain falls for 146.9 days and collects up to 21.22" (539mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. The month with the most snowfall in Crystal Lake is January, when snow falls for 12.5 days and typically aggregates up to 3.31" (84mm) of snow.Daylight
In January, the average length of the day in Crystal Lake is 9h and 31min.On the first day of the month, sunrise is at 7:21 am and sunset at 4:31 pm. On the last day of January, sunrise is at 7:07 am and sunset at 5:05 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 in Crystal Lake. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: In January, the UV index of 1 transforms into the following advice:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
What time of the year is the coldest in Crystal Lake?
How cold is it in Crystal Lake in January?
What are the most humid months in Crystal Lake?
What is the average humidity in January in Crystal Lake?
How many days does it rain in January in Crystal Lake?
What is the snowiest month in Crystal Lake?
How much does it snow in Crystal Lake in January?
How many hours of daylight does Crystal Lake have in January?
When is the sunrise / sunset in January in Crystal Lake?
What is the month with the least sunshine in Crystal Lake?
How many hours of sunshine does Crystal Lake have in January?
What is the month with the lowest UV index in Crystal Lake?
What is the UV index reading in January in Crystal Lake?
Average temperature in January
Crystal Lake, IL
- Average high temperature in January: 27°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in January: 15.1°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 (15.1°F).
Average pressure in January
Crystal Lake, 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
Crystal Lake, IL
- Average wind speed in January: 9.9mph
The windiest months (with the highest average wind speed) are January and February (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in January
Crystal Lake, IL
- Average humidity in January: 85%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are April and October (76%).
Average rainfall in January
Crystal Lake, IL
- Average rainfall in January: 1.1"
The wettest month (with the highest rainfall) is June (2.8").
The driest months (with the least rainfall) are November and December (0.94").
Average rainfall days in January
Crystal Lake, IL
- Average rainfall days in January: 5.5 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in January
Crystal Lake, IL
- Average snowfall in January: 3.31"
The month with the highest snowfall is January (3.31").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Crystal Lake, IL
- Average snowfall days in January: 12.5 days
The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Crystal Lake, IL
- Average daylight in January: 9h and 3min
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 4min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in January
Crystal Lake, IL
- Average sunshine days in January: 14.4 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is July (10 days).
Average UV index in January
Crystal Lake, 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
Crystal Lake, 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 September (Cloud cover 32).
Average visibility in January
Crystal Lake, IL
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, July, September, October, November and December (6mi).
The months with the lowest visibility are January, February and August (5mi).
Crystal Lake, Illinois, USA
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