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
Roanoke's temperature records reveal January as the coldest month, marked by average highs of 30.4°F (-0.9°C) and lows of 18.5°F (-7.5°C).Humidity
In Roanoke, the average relative humidity in January is 81%.Rainfall
In Roanoke, during January, the rain falls for 5.8 days and regularly aggregates up to 1.34" (34mm) of precipitation. In Roanoke, during the entire year, the rain falls for 147.1 days and collects up to 24.17" (614mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Roanoke, Illinois. The months with the most snowfall are January and February, with an average 2.8" (71mm) of accumulated snow.Daylight
In Roanoke, the average length of the day in January is 9h and 39min.On the first day of January in Roanoke, sunrise is at 7:20 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 5:12 pm CST.
Sunshine
The month with the least sunshine is January, with an average of 3.9h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high UV index of 2 in January translates into the following recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Stay sun-safe with clothing that is both closely woven and worn loosely. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Roanoke?
How cold is it in Roanoke in January?
What is the average humidity in January in Roanoke?
How much does it rain in Roanoke in January?
When does it snow the most in Roanoke?
How many days does it snow in January in Roanoke?
What is the average length of the day in January in Roanoke?
When are sunrise and sunset in January in Roanoke?
What is the month with the least sunshine in Roanoke?
How long on average sun shines in January in Roanoke?
What are the months with the lowest UV index in Roanoke?
How high is the UV index in January in Roanoke?
Average temperature in January
Roanoke, IL
- Average high temperature in January: 30.4°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in January: 18.5°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 (18.5°F).
Average pressure in January
Roanoke, 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 (29.91"Hg).
Average wind speed in January
Roanoke, IL
- Average wind speed in January: 10.6mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in January
Roanoke, IL
- Average humidity in January: 81%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in January
Roanoke, IL
- Average rainfall in January: 1.34"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is December (1.22").
Average rainfall days in January
Roanoke, IL
- Average rainfall days in January: 5.8 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in January
Roanoke, IL
- Average snowfall in January: 2.8"
The months with the highest snowfall are January and February (2.8").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Roanoke, IL
- Average snowfall days in January: 11 days
The month with the highest number of snowfall days is January (11 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
Roanoke, 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: 3h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in January
Roanoke, IL
- Average sunshine days in January: 14.8 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9 days).
Average UV index in January
Roanoke, IL
- Average UV index in January: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Roanoke, IL
- Average cloud cover in January: 58
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in January
Roanoke, IL
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Roanoke, Illinois, USA
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