January weather forecastRockton, IL
January
Weather in January
January, the same as December, in Rockton, Illinois, is a freezing cold winter month, with an average temperature fluctuating between 12.7°F (-10.7°C) and 25.2°F (-3.8°C).Temperature
In Rockton, the lowest temperatures are generally noted in January, averaging a high of 25.2°F (-3.8°C) and a low of 12.7°F (-10.7°C).Humidity
With an average relative humidity of 87%, January is the most humid month.Rainfall
In Rockton, during January, the rain falls for 3.1 days and regularly aggregates up to 0.75" (19mm) of precipitation. Throughout the year, there are 122.2 rainfall days, and 16.42" (417mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. January is the month with the most snowfall. Snow falls for 11.5 days and accumulates 2.52" (64mm) of snow.Daylight
The average length of the day in January is 9h and 29min.On the first day of January, sunrise is at 7:25 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:08 pm CST.
Sunshine
January and February, with an average of 3.5h of sunshine, are months with the least sunshine in Rockton.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 low health risk from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 1 in January leads to these recommendations:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Rockton, IL
- Average high temperature in January: 25.2°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in January: 12.7°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).
Average pressure in January
Rockton, 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 (29.91"Hg).
Average wind speed in January
Rockton, IL
- Average wind speed in January: 9.6mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in January
Rockton, 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 (76%).
Average rainfall in January
Rockton, IL
- Average rainfall in January: 0.75"
The wettest month (with the highest rainfall) is June (2.28").
The driest months (with the least rainfall) are February and December (0.67").
Average rainfall days in January
Rockton, IL
- Average rainfall days in January: 3.1 days
The months with the highest number of rainy days are May and June (15.3 days).
The month with the least rainy days is January (3.1 days).
Average snowfall in January
Rockton, IL
- Average snowfall in January: 2.52"
The month with the highest snowfall is January (2.52").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Rockton, IL
- Average snowfall days in January: 11.5 days
The month with the highest number of snowfall days is January (11.5 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
Rockton, 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 30min
The months with the most sunshine are July and August (Average sunshine: 9h and 30min).
The months with the least sunshine are January and February (Average sunshine: 3h and 30min).
Average sunshine days in January
Rockton, IL
- Average sunshine days in January: 17.4 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is June (12.8 days).
Average UV index in January
Rockton, IL
- Average UV index in January: 1
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Rockton, IL
- Average cloud cover in January: 65
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is September (Cloud cover 35).
Average visibility in January
Rockton, IL
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
