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 month of January sees the lowest average temperatures, reaching 26.2°F (-3.2°C) at the peak and 13.8°F (-10.1°C) at the low.Humidity
January is the most humid month in Rockford, with an average relative humidity of 86%.Rainfall
In Rockford, in January, during 5.3 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. Throughout the year, there are 148.1 rainfall days, and 28.39" (721mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Rockford. January is the month with the most snowfall. Snow falls for 13 days and accumulates 4.88" (124mm) of snow.Daylight
In Rockford, the average length of the day in January is 9h and 31min.On the first day of the month, sunrise is at 7:25 am and sunset at 4:34 pm. On the last day of January, sunrise is at 7:10 am and sunset at 5:08 pm CST.
Sunshine
With an average of 3.6h of sunshine, January has the least sunshine of the year in Rockford, Illinois.UV index
The months with the lowest UV index are January, November 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 the average person.Note: The UV index of 1 in January translates into these instructions:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. 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
What is the coldest time of year in Rockford?
How cold is it in Rockford in January?
What is the most humid month in Rockford?
What is the average humidity in January in Rockford?
How many days does it rain in January in Rockford?
When does it snow the most in Rockford?
How much does it snow in Rockford in January?
What is the average length of the day in January in Rockford?
What time are sunrise and sunset in January in Rockford?
What is the month with the least sunshine in Rockford?
How long on average sun shines in January in Rockford?
What are the months with the lowest UV index in Rockford?
How high is the UV index in January in Rockford?
Average temperature in January
Rockford, IL
- Average high temperature in January: 26.2°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 (26.2°F).
- Average low temperature in January: 13.8°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (13.8°F).
Average pressure in January
Rockford, IL
- Average pressure in January: 30.11"Hg
The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Rockford, IL
- Average wind speed in January: 9.8mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in January
Rockford, IL
- Average humidity in January: 86%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall in January
Rockford, IL
- Average rainfall in January: 1.42"
The wettest month (with the highest rainfall) is June (4.02").
The driest month (with the least rainfall) is February (1.26").
Average rainfall days in January
Rockford, IL
- Average rainfall days in January: 5.3 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in January
Rockford, IL
- Average snowfall in January: 4.88"
The month with the highest snowfall is January (4.88").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Rockford, IL
- Average snowfall days in January: 13 days
The month with the highest number of snowfall days is January (13 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
Rockford, 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
Rockford, IL
- Average sunshine days in January: 14.2 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is June (9.8 days).
Average UV index in January
Rockford, 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, November and December (UV index 1).
Average cloud cover in January
Rockford, IL
- Average cloud cover in January: 63
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in January
Rockford, 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).
Rockford, Illinois, USA
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