January weather forecast
Willow Hill, IL

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Weather in January

January, the same as December, is an icy winter month in Willow Hill, Illinois, with an average temperature ranging between max 36°F (2.2°C) and min 23.4°F (-4.8°C).

Temperature

In Willow Hill, Illinois, the lowest average temperatures are observed in January, with a high of 36°F (2.2°C) and a low of 23.4°F (-4.8°C).

Humidity

The average relative humidity in January is 78%.

Rainfall

In Willow Hill, in January, during 9.3 rainfall days, 2.52" (64mm) of precipitation is typically accumulated. In Willow Hill, during the entire year, the rain falls for 158.3 days and collects up to 35.12" (892mm) of precipitation.

Snowfall

Months with snowfall are January through April, November and December. The month with the most snowfall is January, when snow falls for 6.3 days and typically aggregates up to 2.6" (66mm) of snow.

Daylight

In Willow Hill, the average length of the day in January is 9h and 48min.
On the first day of the month, sunrise is at 7:10 am and sunset at 4:40 pm. On the last day of January, sunrise is at 6:59 am and sunset at 5:11 pm CST.

Sunshine

January has the least sunshine of the year, with an average of 4.2h of sunshine.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: A maximum high daily UV index of 2 during January translates into the following directions:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
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Frequently asked questions

What are the coldest months in Willow Hill?

January is the coldest month of the year in Willow Hill, Illinois, registering average temperatures as high as 36°F (2.2°C) and as low as 23.4°F (-4.8°C).

How cold is January in Willow Hill?

In January, the average high-temperature and low-temperature in Willow Hill are 36°F (2.2°C) and 23.4°F (-4.8°C) respectively.

What is the average humidity in January in Willow Hill?

In Willow Hill, the average relative humidity in January is 78%.

How many days does it rain in January in Willow Hill?

In January, the rain falls for 9.3 days. Throughout January, 2.52" (64mm) of precipitation is accumulated.

When does it snow the most in Willow Hill?

January is the month with the most snowfall in Willow Hill. Snow falls for 6.3 days and accumulates 2.6" (66mm) of snow.

How many days does it snow in January in Willow Hill?

In January, in Willow Hill, Illinois, it is snowing for 6.3 days. Throughout January, 2.6" (66mm) of snow is accumulated.

What is the average length of the day in January in Willow Hill?

In Willow Hill, Illinois, the average day length in January is 9h and 48min.

When is the sunrise / sunset in January in Willow Hill?

On the first day of January in Willow Hill, sunrise is at 7:10 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 5:11 pm CST.

What is the month with the least sunshine in Willow Hill?

January has the least sunshine of the year in Willow Hill, Illinois, with an average of 4.2h of sunshine.

How long on average sun shines in January in Willow Hill?

The average sunshine duration in January in Willow Hill, Illinois, is 4.2h.

What is the month with the lowest UV index in Willow Hill?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Willow Hill, Illinois.

What is the UV index intensity in January in Willow Hill?

In Willow Hill, Illinois, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
41.2°F 5.1°C
36°F 2.2°C
40.6°F 4.8°C
Average low temperature
29.7°F -1.3°C
23.4°F -4.8°C
27.5°F -2.5°C
Average pressure
30.13" 765mmHg
30.16" 766mmHg
30.12" 765mmHg
Average wind speed
9.4mph 15.1km/h
10.3mph 16.6km/h
10.3mph 16.6km/h
Average max. wind speed
10.1mph 16.3km/h
10.9mph 17.5km/h
10.9mph 17.5km/h
Average wind speed gusts
15.3mph 24.6km/h
16.4mph 26.4km/h
16.3mph 26.2km/h
Average humidity
79%
78%
78%
Average rainfall
2.52" 64mm
2.52" 64mm
1.93" 49mm
Average rainfall days
10.6
9.3
9.3
Average snowfall
1.18" 30mm
2.6" 66mm
1.61" 41mm
Average snowfall days
3.8
6.3
5.8
Average daylight
9h 3min
9h 5min
10h 5min
Average sunshine
4h 3min
4h 1min
4h 2min
Average sunshine days
17.8
16.9
14.1
Average UV index
2
2
2
Average cloud cover
52%
54%
53%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Willow Hill, IL

Average temperature in January - Willow Hill, IL
  • Average high temperature in January: 36°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in January: 23.4°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

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Average pressure in January
Willow Hill, IL

Average pressure in January - Willow Hill, IL
  • Average pressure in January: 30.16"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in January
Willow Hill, IL

Average wind speed in January - Willow Hill, IL
  • Average wind speed in January: 10.3mph

The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

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Average humidity in January
Willow Hill, IL

Average humidity in January - Willow Hill, IL
  • Average humidity in January: 78%

The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in January
Willow Hill, IL

Average rainfall in January - Willow Hill, IL
  • Average rainfall in January: 2.52"

The wettest month (with the highest rainfall) is April (5.04").
The driest month (with the least rainfall) is September (1.89").

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Average rainfall days in January
Willow Hill, IL

Average rainfall days in January - Willow Hill, IL
  • Average rainfall days in January: 9.3 days

The month with the highest number of rainy days is May (18.7 days).
The months with the least rainy days are January and February (9.3 days).

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Average snowfall in January
Willow Hill, IL

Average snowfall in January - Willow Hill, IL
  • Average snowfall in January: 2.6"

The month with the highest snowfall is January (2.6").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in January
Willow Hill, IL

Average snowfall days in January - Willow Hill, IL
  • Average snowfall days in January: 6.3 days

The month with the highest number of snowfall days is January (6.3 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
Willow Hill, IL

Average daylight in January / Average sunshine in January - Willow Hill, IL
  • Average daylight in January: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in January: 4h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

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Average sunshine days in January
Willow Hill, IL

Average sunshine days in January - Willow Hill, IL
  • Average sunshine days in January: 16.9 days

The month with the most sunshine days is October (18.2 days).
The month with the least sunshine days is May (10.1 days).

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Average UV index in January
Willow Hill, IL

Average UV index in January - Willow Hill, IL
  • Average UV index in January: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in January
Willow Hill, IL

Average cloud cover in January - Willow Hill, IL
  • Average cloud cover in January: 54

The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 29).

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Average visibility in January
Willow Hill, IL

Average visibility in January - Willow Hill, IL
  • Average visibility in January: 6mi

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

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Willow Hill, Illinois, USA

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