January weather forecast
Piasa, IL

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Weather in January

January, like December, in Piasa, Illinois, is an icy winter month, with an average temperature fluctuating between 35.8°F (2.1°C) and 22.6°F (-5.2°C).

Temperature

January brings the lowest temperatures, with an average high of 35.8°F (2.1°C) and an average low of 22.6°F (-5.2°C).

Humidity

The average relative humidity in January is 77%.

Rainfall

January is the month with the least rainfall in Piasa. Rain falls for 6.5 days and accumulates 1.46" (37mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. In Piasa, during January, snow falls for 6.2 days and regularly aggregates up to 2.2" (56mm) of snow. Throughout the year, in Piasa, there are 19.8 snowfall days, and 7.91" (201mm) of snow is accumulated.

Daylight

In Piasa, the average length of the day in January is 9h and 47min.
On the first day of January in Piasa, sunrise is at 7:19 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:19 pm CST.

Sunshine

With an average of 4.4h of sunshine, January has the least sunshine of the year in Piasa.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In January, an average UV index of 2 transforms into the following instructions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
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Frequently asked questions

What is the coldest month in Piasa?

January is the month when Piasa sees the average lowest temperatures, with a high of 35.8°F (2.1°C) and a low of 22.6°F (-5.2°C).

How cold is it in Piasa in January?

In January, in Piasa, the average high-temperature is 35.8°F (2.1°C), and the average low-temperature is 22.6°F (-5.2°C).

What is the average humidity in January in Piasa?

In Piasa, Illinois, the average relative humidity in January is 77%.

What is the driest month in Piasa?

The month with the least rainfall in Piasa is January, when the rain falls for 6.5 days and typically collects 1.46" (37mm) of precipitation.

How much does it rain in Piasa in January?

In Piasa, Illinois, in January, during 6.5 rainfall days, 1.46" (37mm) of precipitation is typically accumulated.

How much does it snow in Piasa in January?

In January, in Piasa, it is snowing for 6.2 days. Throughout January, 2.2" (56mm) of snow is accumulated.

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

In Piasa, Illinois, the average day length in January is 9h and 47min.

What time are sunrise and sunset in January in Piasa?

In January, on the first day of the month, sunrise is at 7:19 am and sunset at 4:48 pm. On the last day of the month, in Piasa, sunrise is at 7:08 am and sunset at 5:19 pm CST.

What is the month with the least sunshine in Piasa?

January has the least sunshine of the year in Piasa, with an average of 4.4h of sunshine.

How long on average sun shines in January in Piasa?

The average sunshine duration in January in Piasa is 4.4h.

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

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

What is the UV index reading in January in Piasa?

In January, the average daily maximum UV index in Piasa is 2. A UV Index estimate of 2, and below, represents a low health threat from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
40.6°F 4.8°C
35.8°F 2.1°C
40.6°F 4.8°C
Average low temperature
29.3°F -1.5°C
22.6°F -5.2°C
26.4°F -3.1°C
Average pressure
30.13" 765mmHg
30.15" 766mmHg
30.12" 765mmHg
Average wind speed
9.1mph 14.6km/h
9.8mph 15.8km/h
9.7mph 15.6km/h
Average max. wind speed
9.8mph 15.8km/h
10.5mph 16.9km/h
10.3mph 16.6km/h
Average wind speed gusts
14.7mph 23.7km/h
15.5mph 24.9km/h
15.3mph 24.6km/h
Average humidity
77%
77%
78%
Average rainfall
1.61" 41mm
1.46" 37mm
1.5" 38mm
Average rainfall days
8.1
6.5
7.2
Average snowfall
1.73" 44mm
2.2" 56mm
2.48" 63mm
Average snowfall days
3.9
6.2
5.9
Average daylight
9h 3min
9h 5min
10h 5min
Average sunshine
4h 5min
4h 2min
4h 3min
Average sunshine days
19.3
19.5
16.4
Average UV index
2
2
2
Average cloud cover
49%
52%
51%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Piasa, IL

Average temperature in January - Piasa, IL
  • Average high temperature in January: 35.8°F

The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (35.8°F).

  • Average low temperature in January: 22.6°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).

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Average pressure in January
Piasa, IL

Average pressure in January - Piasa, IL
  • Average pressure in January: 30.15"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in January
Piasa, IL

Average wind speed in January - Piasa, IL
  • Average wind speed in January: 9.8mph

The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

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Average humidity in January
Piasa, IL

Average humidity in January - Piasa, IL
  • Average humidity in January: 77%

The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in January
Piasa, IL

Average rainfall in January - Piasa, IL
  • Average rainfall in January: 1.46"

The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is January (1.46").

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Average rainfall days in January
Piasa, IL

Average rainfall days in January - Piasa, IL
  • Average rainfall days in January: 6.5 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is January (6.5 days).

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Average snowfall in January
Piasa, IL

Average snowfall in January - Piasa, IL
  • Average snowfall in January: 2.2"

The month with the highest snowfall is February (2.48").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in January
Piasa, IL

Average snowfall days in January - Piasa, IL
  • Average snowfall days in January: 6.2 days

The month with the highest number of snowfall days is January (6.2 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
Piasa, IL

Average daylight in January / Average sunshine in January - Piasa, 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 2min

The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

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Average sunshine days in January
Piasa, IL

Average sunshine days in January - Piasa, IL
  • Average sunshine days in January: 19.5 days

The month with the most sunshine days is January (19.5 days).
The month with the least sunshine days is July (12.1 days).

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Average UV index in January
Piasa, IL

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

The months with the highest UV index are May, 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
Piasa, IL

Average cloud cover in January - Piasa, IL
  • Average cloud cover in January: 52

The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are August and September (Cloud cover 29).

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Average visibility in January
Piasa, IL

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

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