January weather forecastByron, IL

January

Weather in January

January, like December, is another subzero cold winter month in Byron, Illinois, with an average temperature ranging between max 26.2°F (-3.2°C) and min 14°F (-10°C).

Temperature

January is the coldest month, with the temperature often reaching an average high of 26.2°F (-3.2°C) and an average low of 14°F (-10°C).

Humidity

With an average relative humidity of 86%, January is the most humid month.

Rainfall

The months with the least rainfall are January and February Rain falls for 3.2 days and accumulates 0.35" (9mm) of rain.

Snowfall

January through April, October through December are months with snowfall in Byron, Illinois. 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 is 9h and 31min.
On the first day of the month, sunrise is at 7:25 am and sunset at 4:35 pm. On the last day of January, sunrise is at 7:11 am and sunset at 5:09 pm CST.

Sunshine

With an average of 3.7h of sunshine, January has the least sunshine of the year.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In January, a daily UV index of 1 turns into the following recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.

Updated: Jun 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

January is the month when Byron sees the average lowest temperatures, with a high of 26.2°F (-3.2°C) and a low of 14°F (-10°C).

In January, the average high-temperature and low-temperature in Byron are 26.2°F (-3.2°C) and 14°F (-10°C) respectively.

January is the most humid month, with an average relative humidity of 86%.

The average relative humidity in January is 86%.

January and February are months with the least rain when the rain falls for 3.2 days and typically aggregates up to 0.35" (9mm) of rain.

In Byron, in January, during 3.2 rainfall days, 0.35" (9mm) of precipitation is typically accumulated.

The month with the most snowfall is January, when snow falls for 8.1 days and typically aggregates up to 1.42" (36mm) of snow.

In Byron, during January, snow falls for 8.1 days and regularly aggregates up to 1.42" (36mm) of snow.

In January, the average day length in Byron is 9h and 31min.

In January, on the first day of the month, sunrise is at 7:25 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:09 pm CST.

The month with the least sunshine is January, with an average of 3.7h of sunshine.

In Byron, the average sunshine duration in January is 3.7h.

January and December, with an average maximum UV index of 1, are months with the lowest UV index.

In Byron, Illinois, the average daily maximum UV index in January is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

32.5°F

26.2°F

30.4°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

10.1mph

10.4mph

10.6mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

22.6

21.9

19.2

Average UV index

Average cloud cover

Average visibility

Average temperature in January
Byron, 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
Byron, 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
Byron, 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
Byron, 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
Byron, 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
Byron, 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
Byron, 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
Byron, 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
Byron, IL

Average daylight in January: 9h and 30min

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 42min

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
Byron, 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
Byron, 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
Byron, 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
Byron, 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).