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
January, noted for its average high-temperature of 29.7°F (-1.3°C) and an average low-temperature of 17.6°F (-8°C), is considered the coldest month.Humidity
In January, the average relative humidity is 82%.Rainfall
The month with the least rainfall is January, when the rain falls for 5.9 days and typically collects 1.46" (37mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. January is the month with the most snowfall in Gerlaw. Snow falls for 10.9 days and accumulates 4.61" (117mm) of snow.Daylight
The average length of the day in January is 9h and 38min.On the first day of January in Gerlaw, sunrise is at 7:27 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 5:17 pm CST.
Sunshine
With an average of 4.1h of sunshine, January has the least sunshine of the year.UV index
With an average maximum UV index of 1, January is the month with the lowest UV index in Gerlaw. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 1 during January translates into the following directions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest in Gerlaw?
How cold is it in Gerlaw in January?
What is the average humidity in January in Gerlaw?
What is the driest month in Gerlaw?
How much does it rain in Gerlaw in January?
When does it snow the most in Gerlaw?
How much does it snow in Gerlaw in January?
What is the average length of the day in January in Gerlaw?
What time are sunrise and sunset in January in Gerlaw?
What is the month with the least sunshine in Gerlaw?
How long on average sun shines in January in Gerlaw?
When is the lowest UV index in Gerlaw?
What is the UV index intensity in January in Gerlaw?
Average temperature in January
Gerlaw, IL
- Average high temperature in January: 29.7°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in January: 17.6°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).
Average pressure in January
Gerlaw, IL
- Average pressure in January: 30.14"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in January
Gerlaw, IL
- Average wind speed in January: 10.6mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in January
Gerlaw, IL
- Average humidity in January: 82%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Gerlaw, IL
- Average rainfall in January: 1.46"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in January
Gerlaw, IL
- Average rainfall days in January: 5.9 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in January
Gerlaw, IL
- Average snowfall in January: 4.61"
The month with the highest snowfall is January (4.61").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Gerlaw, IL
- Average snowfall days in January: 10.9 days
The month with the highest number of snowfall days is January (10.9 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
Gerlaw, IL
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 4h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in January
Gerlaw, IL
- Average sunshine days in January: 15.8 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in January
Gerlaw, IL
- Average UV index in January: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in January
Gerlaw, IL
- Average cloud cover in January: 57
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in January
Gerlaw, IL
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Gerlaw, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location