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
Roselle's coldest month, January, registers temperatures that range from a high of 27.9°F (-2.3°C) to a low of 16.5°F (-8.6°C).Humidity
The months with the highest humidity in Roselle, Illinois, are January and February, with an average relative humidity of 83%.Rainfall
In Roselle, Illinois, in January, during 6.1 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. In Roselle, during the entire year, the rain falls for 147.4 days and collects up to 24.69" (627mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Roselle, in January, snow falls for 13.1 days, with typically accumulated 3.74" (95mm) of snow. In Roselle, during the entire year, snow falls for 48.9 days and aggregates up to 15.47" (393mm) of snow.Daylight
In January, the average length of the day is 9h and 32min.On the first day of January in Roselle, 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
With an average of 3.6h of sunshine, January has the least sunshine of the year.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Roselle. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In January, an average UV index of 1 transforms into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. 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 in Roselle?
How cold is it in Roselle in January?
What is the most humid month in Roselle?
What is the average humidity in January in Roselle?
How much does it rain in Roselle in January?
How many days does it snow in January in Roselle?
What is the average length of the day in January in Roselle?
When are sunrise and sunset in January in Roselle?
What is the month with the least sunshine in Roselle?
How many hours of sunshine does Roselle have in January?
What is the month with the lowest UV index in Roselle?
What is the UV index reading in January in Roselle?
Average temperature in January
Roselle, IL
- Average high temperature in January: 27.9°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in January: 16.5°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 (16.5°F).
Average pressure in January
Roselle, 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
Roselle, 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
Roselle, 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 (73%).
Average rainfall in January
Roselle, IL
- Average rainfall in January: 1.34"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is December (1.14").
Average rainfall days in January
Roselle, IL
- Average rainfall days in January: 6.1 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in January
Roselle, IL
- Average snowfall in January: 3.74"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Roselle, IL
- Average snowfall days in January: 13.1 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Roselle, 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
Roselle, IL
- Average sunshine days in January: 13.9 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (10.2 days).
Average UV index in January
Roselle, 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
Roselle, 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
Roselle, 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).
Roselle, Illinois, USA
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