January weather forecast
Union, IL

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Weather in January

January, like December, is a freezing cold winter month in Union, Illinois, with temperature in the range of an average low of 13.8°F (-10.1°C) and an average high of 26.1°F (-3.3°C).

Temperature

In Union, Illinois, January records the lowest average temperatures, peaking at 26.1°F (-3.3°C) and reaching a low of 13.8°F (-10.1°C).

Humidity

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

Rainfall

In Union, Illinois, in January, during 5.6 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. Throughout the year, in Union, there are 154.6 rainfall days, and 30.31" (770mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Union are January through April, October through December. January is the month with the most snowfall in Union. Snow falls for 12.3 days and accumulates 5.28" (134mm) of snow.

Daylight

In January, the average length of the day in Union is 9h and 31min.
On the first day of the month, sunrise is at 7:22 am and sunset at 4:32 pm. On the last day of January, sunrise is at 7:08 am and sunset at 5:06 pm CST.

Sunshine

January has the least sunshine of the year, with an average of 3.6h of sunshine.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.
Note: A maximum UV index of 1 in January translates into the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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Frequently asked questions

What are the coldest months in Union?

Union's coldest month, January, registers temperatures that range from a high of 26.1°F (-3.3°C) to a low of 13.8°F (-10.1°C).

How cold is January in Union?

The high-temperature, in January, in Union, is 26.1°F (-3.3°C), while the low-temperature averages to 13.8°F (-10.1°C).

What is the most humid month in Union?

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

What is the average humidity in January in Union?

In Union, the average relative humidity in January is 86%.

How many days does it rain in January in Union?

In Union, Illinois, during January, the rain falls for 5.6 days and regularly aggregates up to 1.61" (41mm) of precipitation.

When does it snow the most in Union?

January is the month with the most snowfall in Union. Snow falls for 12.3 days and accumulates 5.28" (134mm) of snow.

How much does it snow in Union in January?

In January, in Union, it is snowing for 12.3 days. Throughout January, 5.28" (134mm) of snow is accumulated.

What is the average length of the day in January in Union?

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

When is the sunrise / sunset in January in Union?

On the first day of January in Union, sunrise is at 7:22 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:06 pm CST.

What is the month with the least sunshine in Union?

With an average of 3.6h of sunshine, January has the least sunshine of the year.

How many hours of sunshine does Union have in January?

The average sunshine duration in January is 3.6h.

What are the months with the lowest UV index in Union?

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

What is the UV index reading in January in Union?

The average daily maximum UV index in January is 1. A UV Index of 2, and less, symbolizes a low health threat from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
32.5°F 0.3°C
26.1°F -3.3°C
30°F -1.1°C
Average low temperature
22.3°F -5.4°C
13.8°F -10.1°C
17.1°F -8.3°C
Average pressure
30.09" 764mmHg
30.11" 765mmHg
30.1" 765mmHg
Average wind speed
9.1mph 14.6km/h
9.7mph 15.6km/h
9.8mph 15.8km/h
Average max. wind speed
9.8mph 15.8km/h
10.4mph 16.7km/h
10.4mph 16.7km/h
Average wind speed gusts
14.4mph 23.2km/h
15.4mph 24.8km/h
15.5mph 24.9km/h
Average humidity
83%
86%
85%
Average rainfall
1.57" 40mm
1.61" 41mm
1.5" 38mm
Average rainfall days
8
5.6
4.8
Average snowfall
2.8" 71mm
5.28" 134mm
3.86" 98mm
Average snowfall days
10.2
12.3
10.4
Average daylight
9h 1min
9h 3min
10h 4min
Average sunshine
3h 5min
3h 4min
3h 4min
Average sunshine days
16.5
14.8
14.1
Average UV index
1
1
2
Average cloud cover
60%
63%
60%
Average visibility
6mi 9.7km
5mi 8km
5mi 8km

Average temperature in January
Union, IL

Average temperature in January - Union, IL
  • Average high temperature in January: 26.1°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (26.1°F).

  • Average low temperature in January: 13.8°F

The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (13.8°F).

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Average pressure in January
Union, IL

Average pressure in January - Union, 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).

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Average wind speed in January
Union, IL

Average wind speed in January - Union, IL
  • Average wind speed in January: 9.7mph

The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

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Average humidity in January
Union, IL

Average humidity in January - Union, IL
  • Average humidity in January: 86%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (76%).

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Average rainfall in January
Union, IL

Average rainfall in January - Union, IL
  • Average rainfall in January: 1.61"

The wettest month (with the highest rainfall) is June (4.21").
The driest months (with the least rainfall) are February and November (1.5").

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Average rainfall days in January
Union, IL

Average rainfall days in January - Union, IL
  • Average rainfall days in January: 5.6 days

The month with the highest number of rainy days is July (19.3 days).
The month with the least rainy days is February (4.8 days).

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Average snowfall in January
Union, IL

Average snowfall in January - Union, IL
  • Average snowfall in January: 5.28"

The month with the highest snowfall is January (5.28").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Union, IL

Average snowfall days in January - Union, 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 May, June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Union, IL

Average daylight in January / Average sunshine in January - Union, 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 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

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Average sunshine days in January
Union, IL

Average sunshine days in January - Union, IL
  • Average sunshine days in January: 14.8 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (9.5 days).

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Average UV index in January
Union, IL

Average UV index in January - Union, 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).

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Average cloud cover in January
Union, IL

Average cloud cover in January - Union, IL
  • Average cloud cover in January: 63

The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 35).

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Average visibility in January
Union, IL

Average visibility in January - Union, IL
  • Average visibility in January: 5mi

The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).

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Union, Illinois, USA

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