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 is the coldest month, with an average high-temperature of 26.1°F (-3.3°C) and an average low-temperature of 13.5°F (-10.3°C).Humidity
With an average relative humidity of 87%, January is the most humid month in Forreston.Rainfall
In Forreston, in January, it is raining for 5.1 days, with typically 1.14" (29mm) of accumulated precipitation. Throughout the year, in Forreston, there are 145.6 rainfall days, and 23.43" (595mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. January is the month with the most snowfall in Forreston. Snow falls for 12.4 days and accumulates 3.54" (90mm) of snow.Daylight
The average length of the day in January in Forreston is 9h and 31min.On the first day of January in Forreston, sunrise is at 7:26 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 5:10 pm CST.
Sunshine
With an average of 3.6h of sunshine, January has the least sunshine of the year in Forreston.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily maximum UV index of 1 in January translates into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Forreston?
How cold is it in Forreston in January?
What is the most humid month in Forreston?
What is the average humidity in January in Forreston?
How many days does it rain in January in Forreston?
What is the snowiest month in Forreston?
How much does it snow in Forreston in January?
What is the average length of the day in January in Forreston?
When is the sunrise / sunset in January in Forreston?
What is the month with the least sunshine in Forreston?
How many hours of sunshine does Forreston have in January?
What is the month with the lowest UV index in Forreston?
What is the UV index intensity in January in Forreston?
Average temperature in January
Forreston, IL
- Average high temperature in January: 26.1°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 (26.1°F).
- Average low temperature in January: 13.5°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in January
Forreston, IL
- Average pressure in January: 30.12"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Forreston, IL
- Average wind speed in January: 9.9mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in January
Forreston, IL
- Average humidity in January: 87%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall in January
Forreston, IL
- Average rainfall in January: 1.14"
The wettest month (with the highest rainfall) is June (3.39").
The driest months (with the least rainfall) are February and December (1.06").
Average rainfall days in January
Forreston, IL
- Average rainfall days in January: 5.1 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5 days).
Average snowfall in January
Forreston, IL
- Average snowfall in January: 3.54"
The month with the highest snowfall is January (3.54").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Forreston, IL
- Average snowfall days in January: 12.4 days
The month with the highest number of snowfall days is January (12.4 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
Forreston, 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: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in January
Forreston, IL
- Average sunshine days in January: 14.9 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (9.7 days).
Average UV index in January
Forreston, IL
- Average UV index in January: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Forreston, IL
- Average cloud cover in January: 62
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in January
Forreston, IL
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Forreston, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location