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, with an average high of 32.5°F (0.3°C) and a low of 20.5°F (-6.4°C), signifies the coldest month of the year.Humidity
The average relative humidity in January is 80%.Rainfall
In Illiopolis, in January, it is raining for 6.3 days, with typically 1.42" (36mm) of accumulated precipitation. Throughout the year, in Illiopolis, there are 141.8 rainfall days, and 22.24" (565mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. January is the month with the most snowfall. Snow falls for 9.4 days and accumulates 2.24" (57mm) of snow.Daylight
The average length of the day in January is 9h and 44min.On the first day of the month, sunrise is at 7:18 am and sunset at 4:42 pm. On the last day of January, sunrise is at 7:06 am and sunset at 5:14 pm CST.
Sunshine
With an average of 4h 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 Illiopolis, Illinois. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.Note: In January, a daily maximum UV index of 1 leads to the following instructions:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Frequently asked questions
What part of the year is the coldest in Illiopolis?
How cold is January in Illiopolis?
What is the average humidity in January in Illiopolis?
How many days does it rain in January in Illiopolis?
What is the snowiest month in Illiopolis?
How many days does it snow in January in Illiopolis?
What is the average length of the day in January in Illiopolis?
When are sunrise and sunset in January in Illiopolis?
What is the month with the least sunshine in Illiopolis?
How many hours of sunshine does Illiopolis have in January?
When is the lowest UV index in Illiopolis?
How high is the UV index in January in Illiopolis?
Average temperature in January
Illiopolis, IL
- Average high temperature in January: 32.5°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in January: 20.5°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in January
Illiopolis, IL
- Average pressure in January: 30.15"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Illiopolis, IL
- Average wind speed in January: 10.4mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in January
Illiopolis, IL
- Average humidity in January: 80%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in January
Illiopolis, IL
- Average rainfall in January: 1.42"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is December (1.1").
Average rainfall days in January
Illiopolis, IL
- Average rainfall days in January: 6.3 days
The month with the highest number of rainy days is May (17 days).
The months with the least rainy days are January and February (6.3 days).
Average snowfall in January
Illiopolis, IL
- Average snowfall in January: 2.24"
The month with the highest snowfall is January (2.24").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Illiopolis, IL
- Average snowfall days in January: 9.4 days
The month with the highest number of snowfall days is January (9.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in January /
Average sunshine in January
Illiopolis, IL
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January: 4h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in January
Illiopolis, IL
- Average sunshine days in January: 16.3 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in January
Illiopolis, IL
- Average UV index in January: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in January
Illiopolis, 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 June and September (Cloud cover 31).
Average visibility in January
Illiopolis, 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).
Illiopolis, Illinois, USA
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