January weather forecast
Algonquin, IL

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Weather in January

January, the same as December, in Algonquin, Illinois, is a freezing cold winter month, with temperature in the range of an average high of 27°F (-2.8°C) and an average low of 15.3°F (-9.3°C).

Temperature

January, with its average high-temperature of 27°F (-2.8°C) and an average low-temperature of 15.3°F (-9.3°C), holds the record as the coldest month.

Humidity

The most humid month in Algonquin, Illinois, is January, with an average relative humidity of 85%.

Rainfall

In Algonquin, during January, the rain falls for 4.9 days and regularly aggregates up to 0.79" (20mm) of precipitation. Throughout the year, in Algonquin, there are 132.8 rainfall days, and 15.47" (393mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. The month with the most snowfall is January, when snow falls for 12.2 days and typically aggregates up to 2.01" (51mm) of snow.

Daylight

In Algonquin, Illinois, the average length of the day in January is 9h and 31min.
On the first day of the month, sunrise is at 7:21 am and sunset at 4:31 pm. On the last day of January, in Algonquin, sunrise is at 7:07 am and sunset at 5:05 pm CST.

Sunshine

The month with the least sunshine is January, with an average of 3.7h of sunshine.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Algonquin. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 1 during January translates into the following guidance:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Stay sun-safe with clothing that is both closely woven and worn loosely. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest in Algonquin?

With its average high temperature of 27°F (-2.8°C) and a low of 15.3°F (-9.3°C), January is regarded as the coldest month in Algonquin.

How cold is January in Algonquin?

The high-temperature in Algonquin, Illinois, during January is 27°F (-2.8°C) and the low-temperature is 15.3°F (-9.3°C).

What is the most humid month in Algonquin?

The most humid month in Algonquin is January, with an average relative humidity of 85%.

What is the average humidity in January in Algonquin?

The average relative humidity in January in Algonquin, Illinois, is 85%.

How many days does it rain in January in Algonquin?

In Algonquin, Illinois, during January, the rain falls for 4.9 days and regularly aggregates up to 0.79" (20mm) of precipitation.

When does it snow the most in Algonquin?

January is the month with the most snowfall in Algonquin. Snow falls for 12.2 days and accumulates 2.01" (51mm) of snow.

How much does it snow in Algonquin in January?

In Algonquin, Illinois, during January, snow falls for 12.2 days and regularly aggregates up to 2.01" (51mm) of snow.

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

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

When is the sunrise / sunset in January in Algonquin?

On the first day of January in Algonquin, sunrise is at 7:21 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 5:05 pm CST.

What is the month with the least sunshine in Algonquin?

January has the least sunshine of the year, with an average of 3.7h of sunshine.

How many hours of sunshine does Algonquin have in January?

In Algonquin, the average sunshine duration in January is 3.7h.

When is the lowest UV index in Algonquin?

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

How high is the UV index in January in Algonquin?

In Algonquin, the average daily maximum UV index in January is 1. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Algonquin, IL

Average temperature in January - Algonquin, IL
  • Average high temperature in January: 27°F

The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (27°F).

  • Average low temperature in January: 15.3°F

The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).

Average pressure in January
Algonquin, IL

Average pressure in January - Algonquin, 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).

Average wind speed in January
Algonquin, IL

Average wind speed in January - Algonquin, IL
  • Average wind speed in January: 9.9mph

The windiest months (with the highest average wind speed) are January and February (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

Average humidity in January
Algonquin, IL

Average humidity in January - Algonquin, IL
  • Average humidity in January: 85%

The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are April and October (76%).

Average rainfall in January
Algonquin, IL

Average rainfall in January - Algonquin, IL
  • Average rainfall in January: 0.79"

The wettest months (with the highest rainfall) are April and August (1.89").
The driest month (with the least rainfall) is December (0.67").

Average rainfall days in January
Algonquin, IL

Average rainfall days in January - Algonquin, IL
  • Average rainfall days in January: 4.9 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (4.1 days).

Average snowfall in January
Algonquin, IL

Average snowfall in January - Algonquin, IL
  • Average snowfall in January: 2.01"

The month with the highest snowfall is January (2.01").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in January
Algonquin, IL

Average snowfall days in January - Algonquin, IL
  • Average snowfall days in January: 12.2 days

The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in January / Average sunshine in January - Algonquin, 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: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in January
Algonquin, IL

Average sunshine days in January - Algonquin, IL
  • Average sunshine days in January: 16.2 days

The month with the most sunshine days is December (18.5 days).
The month with the least sunshine days is July (10.7 days).

Average UV index in January
Algonquin, IL

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

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

Average cloud cover in January
Algonquin, IL

Average cloud cover in January - Algonquin, IL
  • Average cloud cover in January: 62

The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July, August and September (Cloud cover 32).

Average visibility in January
Algonquin, IL

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

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

Algonquin, Illinois, USA

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