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 is the coldest month, exhibiting average temperatures of 27.7°F (-2.4°C) at the peak and 16.3°F (-8.7°C) at the base.Humidity
The months with the highest humidity are January and February, with an average relative humidity of 83%.Rainfall
In January, the rain falls for 5.4 days. Throughout January, 1.22" (31mm) of precipitation is accumulated. Throughout the year, there are 141.5 rainfall days, and 22.76" (578mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. The month with the most snowfall is January, when snow falls for 12.3 days and typically aggregates up to 3.39" (86mm) of snow.Daylight
The average length of the day in January is 9h and 32min.On the first day of January, sunrise is at 7:20 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 5:05 pm CST.
Sunshine
The month with the least sunshine is January, with an average of 3.6h of sunshine.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: A typical high UV index of 1 in January suggests the following recommendations:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold is January?
What are the most humid months?
What is the average humidity in January?
How many days does it rain in January?
What is the snowiest month?
How many days does it snow in January?
How many hours of daylight does Bartlett have in January?
When are sunrise and sunset in January?
What is the month with the least sunshine in Bartlett?
How many hours of sunshine does Bartlett have in January?
What are the months with the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Bartlett, IL
- Average high temperature in January: 27.7°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (27.7°F).
- Average low temperature in January: 16.3°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 (16.3°F).
Average pressure in January
Bartlett, 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
Bartlett, IL
- Average wind speed in January: 9.9mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in January
Bartlett, IL
- Average humidity in January: 83%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in January
Bartlett, IL
- Average rainfall in January: 1.22"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is December (1.02").
Average rainfall days in January
Bartlett, IL
- Average rainfall days in January: 5.4 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in January
Bartlett, IL
- Average snowfall in January: 3.39"
The month with the highest snowfall is January (3.39").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Bartlett, IL
- Average snowfall days in January: 12.3 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Bartlett, 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 months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in January
Bartlett, IL
- Average sunshine days in January: 14.3 days
The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is July (10.9 days).
Average UV index in January
Bartlett, IL
- Average UV index in January: 1
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Bartlett, 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 July, August and September (Cloud cover 33).
Average visibility in January
Bartlett, 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).
Bartlett, Illinois, USA
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