January weather forecast
Harmon, IL

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Weather in January

January, like December, is a freezing cold winter month in Harmon, Illinois, with temperature in the range of an average high of 27.7°F (-2.4°C) and an average low of 14.9°F (-9.5°C).

Temperature

January is the month when Harmon sees the lowest average temperatures, with a high of 27.7°F (-2.4°C) and a low of 14.9°F (-9.5°C).

Humidity

January and July, with an average relative humidity of 85%, are the most humid months in Harmon.

Rainfall

The months with the least rainfall are January and February Rain falls for 4.8 days and accumulates 0.75" (19mm) of rain.

Snowfall

January through April, October through December are months with snowfall in Harmon. The month with the most snowfall in Harmon is January, when snow falls for 10.2 days and typically aggregates up to 2.56" (65mm) of snow.

Daylight

In January, the average length of the day in Harmon, Illinois, is 9h and 34min.
On the first day of January, sunrise is at 7:25 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:11 pm CST.

Sunshine

With an average of 3.8h of sunshine, January has the least sunshine of the year.

UV index

In January, the average daily maximum UV index in Harmon is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In January, the maximum UV index of 2 translates into these guidelines:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Experience reduced UV exposure by about half when donning a wide-brim hat. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
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Frequently asked questions

What are the coldest months in Harmon?

January, having an average high-temperature of 27.7°F (-2.4°C) and an average low-temperature of 14.9°F (-9.5°C), is the coldest month.

How cold is January in Harmon?

In January, in Harmon, the average high-temperature is 27.7°F (-2.4°C), and the average low-temperature is 14.9°F (-9.5°C).

What are the most humid months in Harmon?

January and July, with an average relative humidity of 85%, are most humid months in Harmon, Illinois.

What is the average humidity in January in Harmon?

In Harmon, Illinois, the average relative humidity in January is 85%.

What is the driest month in Harmon?

The months with the least rainfall in Harmon, Illinois, are January and February Rain falls for 4.8 days and accumulates 0.75" (19mm) of rain.

How many days does it rain in January in Harmon?

In Harmon, Illinois, during January, the rain falls for 4.8 days and regularly aggregates up to 0.75" (19mm) of precipitation.

What is the snowiest month in Harmon?

January is the month with the most snowfall. Snow falls for 10.2 days and accumulates 2.56" (65mm) of snow.

How many days does it snow in January in Harmon?

In Harmon, Illinois, during January, snow falls for 10.2 days and regularly aggregates up to 2.56" (65mm) of snow.

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

In Harmon, the average day length in January is 9h and 34min.

When are sunrise and sunset in January in Harmon?

In January, on the first day of the month, sunrise is at 7:25 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:11 pm CST.

What is the month with the least sunshine in Harmon?

With an average of 3.8h of sunshine, January has the least sunshine of the year in Harmon.

How long on average sun shines in January in Harmon?

In January, the average sunshine duration in Harmon is 3.8h.

How high is the UV index in January in Harmon?

In January, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health threat from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
33.8°F 1°C
27.7°F -2.4°C
31.6°F -0.2°C
Average low temperature
23.2°F -4.9°C
14.9°F -9.5°C
18.5°F -7.5°C
Average pressure
30.1" 765mmHg
30.12" 765mmHg
30.11" 765mmHg
Average wind speed
9.5mph 15.3km/h
10mph 16.1km/h
10.1mph 16.3km/h
Average max. wind speed
10.1mph 16.3km/h
10.7mph 17.2km/h
10.8mph 17.4km/h
Average wind speed gusts
15.2mph 24.5km/h
16mph 25.7km/h
16.1mph 25.9km/h
Average humidity
82%
85%
84%
Average rainfall
0.83" 21mm
0.75" 19mm
0.75" 19mm
Average rainfall days
5.7
4.8
5
Average snowfall
1.3" 33mm
2.56" 65mm
2.09" 53mm
Average snowfall days
7.4
10.2
8.2
Average daylight
9h 1min
9h 4min
10h 4min
Average sunshine
4h 1min
3h 5min
4h 0min
Average sunshine days
18.8
17
16.2
Average UV index
1
2
2
Average cloud cover
57%
60%
57%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Harmon, IL

Average temperature in January - Harmon, IL
  • Average high temperature in January: 27.7°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (27.7°F).

  • Average low temperature in January: 14.9°F

The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).

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Average pressure in January
Harmon, IL

Average pressure in January - Harmon, 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).

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Average wind speed in January
Harmon, IL

Average wind speed in January - Harmon, IL
  • Average wind speed in January: 10mph

The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

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Average humidity in January
Harmon, IL

Average humidity in January - Harmon, 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 (73%).

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Average rainfall in January
Harmon, IL

Average rainfall in January - Harmon, IL
  • Average rainfall in January: 0.75"

The wettest month (with the highest rainfall) is May (2.83").
The driest months (with the least rainfall) are January and February (0.75").

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Average rainfall days in January
Harmon, IL

Average rainfall days in January - Harmon, IL
  • Average rainfall days in January: 4.8 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (4.8 days).

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Average snowfall in January
Harmon, IL

Average snowfall in January - Harmon, IL
  • Average snowfall in January: 2.56"

The month with the highest snowfall is January (2.56").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Harmon, IL

Average snowfall days in January - Harmon, IL
  • Average snowfall days in January: 10.2 days

The month with the highest number of snowfall days is January (10.2 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
Harmon, IL

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

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 5min

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 48min).

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Average sunshine days in January
Harmon, IL

Average sunshine days in January - Harmon, IL
  • Average sunshine days in January: 17 days

The months with the most sunshine days are November and December (18.8 days).
The month with the least sunshine days is June (11.3 days).

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Average UV index in January
Harmon, IL

Average UV index in January - Harmon, IL
  • Average UV index in January: 2

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in January
Harmon, IL

Average cloud cover in January - Harmon, IL
  • Average cloud cover in January: 60

The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 31).

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Average visibility in January
Harmon, IL

Average visibility in January - Harmon, 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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Harmon, Illinois, USA

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