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, known for its average high temperature of 29.5°F (-1.4°C) and an average low temperature of 17.4°F (-8.1°C), is the coldest month.Humidity
In Rio, the average relative humidity in January is 82%.Rainfall
The months with the least rainfall are January and December Rain falls for 4 days and accumulates 0.47" (12mm) of rain.Snowfall
Months with snowfall in Rio are January through April, October through December. The month with the most snowfall in Rio, Illinois, is January, when snow falls for 8.8 days and typically aggregates up to 1.38" (35mm) of snow.Daylight
In January, the average length of the day is 9h and 37min.On the first day of January, sunrise is at 7:26 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 5:16 pm CST.
Sunshine
The month with the least sunshine in Rio is January, with an average of 4h of sunshine.UV index
In Rio, the average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 2 during January leads to these advisories:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What part of the year is the coldest in Rio?
How cold is January in Rio?
What is the average humidity in January in Rio?
What is the driest month in Rio?
How many days does it rain in January in Rio?
When does it snow the most in Rio?
How much does it snow in Rio in January?
How many hours of daylight does Rio have in January?
When is the sunrise / sunset in January in Rio?
What is the month with the least sunshine in Rio?
How long on average sun shines in January in Rio?
What is the UV index reading in January in Rio?
Average temperature in January
Rio, IL
- Average high temperature in January: 29.5°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 (29.5°F).
- Average low temperature in January: 17.4°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 (17.4°F).
Average pressure in January
Rio, 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
Rio, IL
- Average wind speed in January: 10.6mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in January
Rio, IL
- Average humidity in January: 82%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in January
Rio, IL
- Average rainfall in January: 0.47"
The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are January and December (0.47").
Average rainfall days in January
Rio, IL
- Average rainfall days in January: 4 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is February (3.9 days).
Average snowfall in January
Rio, IL
- Average snowfall in January: 1.38"
The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Rio, IL
- Average snowfall days in January: 8.8 days
The month with the highest number of snowfall days is January (8.8 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
Rio, 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: 4h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in January
Rio, IL
- Average sunshine days in January: 20 days
The month with the most sunshine days is December (21.6 days).
The month with the least sunshine days is June (12.4 days).
Average UV index in January
Rio, IL
- Average UV index in January: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Rio, 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
Rio, IL
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Rio, Illinois, USA
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