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 period is January, when temperatures fluctuate between an average high of 27°F (-2.8°C) and a low of 14.7°F (-9.6°C).Humidity
January and July, with an average relative humidity of 85%, are the most humid months.Rainfall
In January, the rain falls for 4.4 days. Throughout January, 0.63" (16mm) of precipitation is accumulated. In Rochelle, during the entire year, the rain falls for 124.5 days and collects up to 14.49" (368mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. The month with the most snowfall is January, when snow falls for 10.3 days and typically aggregates up to 2.2" (56mm) of snow.Daylight
In January, the average length of the day is 9h and 32min.On the first day of January in Rochelle, sunrise is at 7:23 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 5:09 pm CST.
Sunshine
January has the least sunshine of the year, 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 reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 1 during January leads to these advisories:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Frequently asked questions
What part of the year is the coldest in Rochelle?
How cold is it in Rochelle in January?
What are the most humid months in Rochelle?
What is the average humidity in January in Rochelle?
How much does it rain in Rochelle in January?
When does it snow the most in Rochelle?
How much does it snow in Rochelle in January?
How many hours of daylight does Rochelle have in January?
When are sunrise and sunset in January in Rochelle?
What is the month with the least sunshine in Rochelle?
How long on average sun shines in January in Rochelle?
What is the month with the lowest UV index in Rochelle?
What is the UV index reading in January in Rochelle?
Average temperature in January
Rochelle, 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: 14.7°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 (14.7°F).
Average pressure in January
Rochelle, 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
Rochelle, IL
- Average wind speed in January: 10mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in January
Rochelle, IL
- Average humidity in January: 85%
The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (74%).
Average rainfall in January
Rochelle, IL
- Average rainfall in January: 0.63"
The wettest month (with the highest rainfall) is June (2.13").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days in January
Rochelle, IL
- Average rainfall days in January: 4.4 days
The month with the highest number of rainy days is June (16 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in January
Rochelle, IL
- Average snowfall in January: 2.2"
The month with the highest snowfall is January (2.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Rochelle, IL
- Average snowfall days in January: 10.3 days
The month with the highest number of snowfall days is January (10.3 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
Rochelle, 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 June (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in January
Rochelle, IL
- Average sunshine days in January: 17.4 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in January
Rochelle, IL
- Average UV index in January: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Rochelle, IL
- Average cloud cover in January: 63
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility in January
Rochelle, 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).
Rochelle, Illinois, USA
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