January weather forecast
Williamsfield, IL

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Weather in January

January, like December, is another subzero cold winter month in Williamsfield, Illinois, with an average temperature varying between 17.8°F (-7.9°C) and 29.7°F (-1.3°C).

Temperature

January brings the lowest temperatures, with an average high of 29.7°F (-1.3°C) and an average low of 17.8°F (-7.9°C).

Humidity

In Williamsfield, the average relative humidity in January is 82%.

Rainfall

The month with the least rainfall in Williamsfield is January, when the rain falls for 4.2 days and typically collects 0.59" (15mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December. January is the month with the most snowfall. Snow falls for 8.6 days and accumulates 1.81" (46mm) of snow.

Daylight

The average length of the day in January in Williamsfield, Illinois, is 9h and 38min.
On the first day of January, sunrise is at 7:24 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:15 pm CST.

Sunshine

With an average of 3.9h of sunshine, January has the least sunshine of the year.

UV index

The months with the lowest UV index in Williamsfield are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index of 1 in January interprets into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. To cut down UV radiation exposure by about half, sport a wide-brim hat. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
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Frequently asked questions

What is the coldest time of year in Williamsfield?

In Williamsfield, January is the month with the lowest recorded average temperatures, measuring a high of 29.7°F (-1.3°C) and a low of 17.8°F (-7.9°C).

How cold is it in Williamsfield in January?

An average high-temperature, in January, in Williamsfield, is 29.7°F (-1.3°C) and the average low-temperature is 17.8°F (-7.9°C).

What is the average humidity in January in Williamsfield?

The average relative humidity in January in Williamsfield, Illinois, is 82%.

What is the driest month in Williamsfield?

January is the month with the least rainfall in Williamsfield. Rain falls for 4.2 days and accumulates 0.59" (15mm) of precipitation.

How many days does it rain in January in Williamsfield?

In Williamsfield, in January, it is raining for 4.2 days, with typically 0.59" (15mm) of accumulated precipitation.

What is the snowiest month in Williamsfield?

The month with the most snowfall in Williamsfield is January, when snow falls for 8.6 days and typically aggregates up to 1.81" (46mm) of snow.

How many days does it snow in January in Williamsfield?

In January, it is snowing for 8.6 days. Throughout January, 1.81" (46mm) of snow is accumulated.

How many hours of daylight does Williamsfield have in January?

In January, the average day length in Williamsfield, Illinois, is 9h and 38min.

When are sunrise and sunset in January in Williamsfield?

On the first day of January in Williamsfield, Illinois, sunrise is at 7:24 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:15 pm CST.

What is the month with the least sunshine in Williamsfield?

January has the least sunshine of the year in Williamsfield, with an average of 3.9h of sunshine.

How many hours of sunshine does Williamsfield have in January?

The average sunshine duration in January is 3.9h.

What is the month with the lowest UV index in Williamsfield?

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

How high is the UV index in January in Williamsfield?

In Williamsfield, Illinois, the average daily maximum UV index in January is 1. A UV Index of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
35.8°F 2.1°C
29.7°F -1.3°C
34.5°F 1.4°C
Average low temperature
25°F -3.9°C
17.8°F -7.9°C
21.6°F -5.8°C
Average pressure
30.11" 765mmHg
30.14" 766mmHg
30.11" 765mmHg
Average wind speed
9.9mph 15.9km/h
10.5mph 16.9km/h
10.4mph 16.7km/h
Average max. wind speed
10.6mph 17.1km/h
11.1mph 17.9km/h
11.1mph 17.9km/h
Average wind speed gusts
16mph 25.7km/h
16.8mph 27km/h
16.6mph 26.7km/h
Average humidity
81%
82%
81%
Average rainfall
0.63" 16mm
0.59" 15mm
0.67" 17mm
Average rainfall days
5.4
4.2
4.2
Average snowfall
0.83" 21mm
1.81" 46mm
1.22" 31mm
Average snowfall days
5.8
8.6
6.8
Average daylight
9h 2min
9h 4min
10h 4min
Average sunshine
4h 2min
3h 5min
4h 1min
Average sunshine days
20.4
19.8
18.8
Average UV index
1
1
2
Average cloud cover
54%
58%
55%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Williamsfield, IL

Average temperature in January - Williamsfield, IL
  • Average high temperature in January: 29.7°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in January: 17.8°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).

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Average pressure in January
Williamsfield, IL

Average pressure in January - Williamsfield, IL
  • Average pressure in January: 30.14"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in January
Williamsfield, IL

Average wind speed in January - Williamsfield, IL
  • Average wind speed in January: 10.5mph

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

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Average humidity in January
Williamsfield, IL

Average humidity in January - Williamsfield, IL
  • Average humidity in January: 82%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in January
Williamsfield, IL

Average rainfall in January - Williamsfield, IL
  • Average rainfall in January: 0.59"

The wettest month (with the highest rainfall) is May (2.24").
The driest month (with the least rainfall) is January (0.59").

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Average rainfall days in January
Williamsfield, IL

Average rainfall days in January - Williamsfield, IL
  • Average rainfall days in January: 4.2 days

The month with the highest number of rainy days is May (15.2 days).
The months with the least rainy days are January and February (4.2 days).

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Average snowfall in January
Williamsfield, IL

Average snowfall in January - Williamsfield, IL
  • Average snowfall in January: 1.81"

The month with the highest snowfall is January (1.81").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Williamsfield, IL

Average snowfall days in January - Williamsfield, IL
  • Average snowfall days in January: 8.6 days

The month with the highest number of snowfall days is January (8.6 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
Williamsfield, IL

Average daylight in January / Average sunshine in January - Williamsfield, IL
  • Average daylight in January: 9h and 4min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in January: 3h and 5min

The months with the most sunshine are June and July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in January
Williamsfield, IL

Average sunshine days in January - Williamsfield, IL
  • Average sunshine days in January: 19.8 days

The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is May (12.8 days).

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Average UV index in January
Williamsfield, IL

Average UV index in January - Williamsfield, IL
  • Average UV index in January: 1

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in January
Williamsfield, IL

Average cloud cover in January - Williamsfield, IL
  • Average cloud cover in January: 58

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).

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Average visibility in January
Williamsfield, IL

Average visibility in January - Williamsfield, IL
  • Average visibility in January: 6mi

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

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Williamsfield, Illinois, USA

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