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
In Cary, the month of January is known for its lowest average temperatures, reaching a high of 27°F (-2.8°C) and a low of 15.3°F (-9.3°C).Humidity
January and February, with an average relative humidity of 84%, are the most humid months.Rainfall
In January, the rain falls for 5.3 days. Throughout January, 1.3" (33mm) of precipitation is accumulated. In Cary, during the entire year, the rain falls for 151.2 days and collects up to 24.17" (614mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. The month with the most snowfall is January, when snow falls for 13.2 days and typically aggregates up to 3.82" (97mm) of snow.Daylight
The average length of the day in January is 9h and 31min.On the first day of January, sunrise is at 7:21 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 5:05 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 3.6h of sunshine.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.Note: In January, the maximum UV index of 1 suggests this advice:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold is it in January?
What are the most humid months?
What is the average humidity in January?
How many days does it rain in January?
When does it snow the most in Cary?
How much does it snow in January?
What is the average length of the day in January?
What time are sunrise and sunset in January in Cary?
What is the month with the least sunshine?
How long on average sun shines in January?
When is the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Cary, IL
- Average high temperature in January: 27°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 (27°F).
- Average low temperature in January: 15.3°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in January
Cary, 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 (29.92"Hg).
Average wind speed in January
Cary, IL
- Average wind speed in January: 10mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in January
Cary, IL
- Average humidity in January: 84%
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is October (75%).
Average rainfall in January
Cary, IL
- Average rainfall in January: 1.3"
The wettest month (with the highest rainfall) is June (3.15").
The driest month (with the least rainfall) is December (1.1").
Average rainfall days in January
Cary, IL
- Average rainfall days in January: 5.3 days
The month with the highest number of rainy days is July (18.8 days).
The months with the least rainy days are January and February (5.3 days).
Average snowfall in January
Cary, IL
- Average snowfall in January: 3.82"
The month with the highest snowfall is January (3.82").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Cary, IL
- Average snowfall days in January: 13.2 days
The month with the highest number of snowfall days is January (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Cary, 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: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in January
Cary, IL
- Average sunshine days in January: 13.7 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (10 days).
Average UV index in January
Cary, IL
- Average UV index in January: 1
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Cary, IL
- Average cloud cover in January: 62
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in January
Cary, IL
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Cary, Illinois, USA
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