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 coldest time of the year is January, with temperatures averaging a high of 26.2°F (-3.2°C) and a low of 14°F (-10°C).Humidity
The most humid month is January, with an average relative humidity of 86%.Rainfall
The months with the least rainfall in Stillman Valley are January and February Rain falls for 3.2 days and accumulates 0.35" (9mm) of rain.Snowfall
Months with snowfall are January through April, October through December. January is the month with the most snowfall. Snow falls for 8.1 days and accumulates 1.42" (36mm) of snow.Daylight
The average length of the day in January in Stillman Valley is 9h and 32min.On the first day of the month, sunrise is at 7:24 am and sunset at 4:35 pm. On the last day of January, in Stillman Valley, sunrise is at 7:10 am and sunset at 5:09 pm CST.
Sunshine
January has the least sunshine of the year in Stillman Valley, with an average of 3.7h of sunshine.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Stillman Valley. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In January, an average UV index of 1 transforms into the following instructions:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Take note! UV radiation from the Sun can double in intensity 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 Stillman Valley?
How cold is January in Stillman Valley?
What is the most humid month in Stillman Valley?
What is the average humidity in January in Stillman Valley?
What is the driest month in Stillman Valley?
How much does it rain in Stillman Valley in January?
When does it snow the most in Stillman Valley?
How many days does it snow in January in Stillman Valley?
How many hours of daylight does Stillman Valley have in January?
When is the sunrise / sunset in January in Stillman Valley?
What is the month with the least sunshine in Stillman Valley?
How many hours of sunshine does Stillman Valley have in January?
What are the months with the lowest UV index in Stillman Valley?
What is the UV index reading in January in Stillman Valley?
Average temperature in January
Stillman Valley, 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: 14°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14°F).
Average pressure in January
Stillman Valley, IL
- Average pressure in January: 30.12"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Stillman Valley, IL
- Average wind speed in January: 9.8mph
The windiest month (with the highest average wind speed) is April (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in January
Stillman Valley, 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
Stillman Valley, IL
- Average rainfall in January: 0.35"
The wettest month (with the highest rainfall) is May (1.18").
The driest months (with the least rainfall) are January and February (0.35").
Average rainfall days in January
Stillman Valley, IL
- Average rainfall days in January: 3.2 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is January (3.2 days).
Average snowfall in January
Stillman Valley, IL
- Average snowfall in January: 1.42"
The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Stillman Valley, IL
- Average snowfall days in January: 8.1 days
The month with the highest number of snowfall days is January (8.1 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
Stillman Valley, 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 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in January
Stillman Valley, IL
- Average sunshine days in January: 21.9 days
The month with the most sunshine days is December (22.6 days).
The month with the least sunshine days is June (12.8 days).
Average UV index in January
Stillman Valley, IL
- Average UV index in January: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Stillman Valley, IL
- Average cloud cover in January: 62
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in January
Stillman Valley, IL
- Average visibility in January: 5mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Stillman Valley, Illinois, USA
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