January weather forecast
Peoria, IL

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Street lights and tall buildings in the city of Peoria, Illinois, as well as the night sky reflected in the waterfront
Street lights and tall buildings in the city of Peoria, Illinois, as well as the night sky reflected in the waterfront

Weather in January

As the new year dawns in Peoria, Illinois, winter finds its stride. January is classified as the coldest month of the year with low temperature reaching 18.9°F (-7.3°C) and high temperatures hovering around 30.7°F (-0.7°C). Also, frosty conditions are further heightened by frequent snowfall, contributing to an average winter wonderland setting. The fact that January sports the lowest UV index and embodies a high humidity level characterizes the cool, damp winter air pervading this month. Its short daylight hours further enhance the magical winter allure, lit up by the rare glimmers of sunlight.

Temperature

January is the coldest month, with an average high-temperature of 30.7°F (-0.7°C) and an average low-temperature of 18.9°F (-7.3°C).

Humidity

The average relative humidity in January is 81%.

Rainfall

January is the month with the least rainfall. Rain falls for 5.2 days and accumulates 0.75" (19mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December. The month with the most snowfall in Peoria is January, when snow falls for 9 days and typically aggregates up to 2.36" (60mm) of snow.

Daylight

In January, the average length of the day is 9h and 39min.
On the first day of January, sunrise is at 7:22 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 5:14 pm CST.

Sunshine

January has the least sunshine of the year in Peoria, with an average of 4h 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 of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high daily UV index of 2 during January translates into the following directions:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
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Frequently asked questions

What are the coldest months in Peoria?

The coldest time of the year in Peoria, Illinois, is January, with temperatures averaging a high of 30.7°F (-0.7°C) and a low of 18.9°F (-7.3°C).

How cold is January in Peoria?

January temperatures vary between a high-temperature of 30.7°F (-0.7°C) and a low-temperature of 18.9°F (-7.3°C).

What is the average humidity in January in Peoria?

In Peoria, the average relative humidity in January is 81%.

What is the driest month in Peoria?

January is the month with the least rainfall in Peoria, Illinois. Rain falls for 5.2 days and accumulates 0.75" (19mm) of precipitation.

How much does it rain in Peoria in January?

In January, in Peoria, the rain falls for 5.2 days. Throughout January, 0.75" (19mm) of precipitation is accumulated.

When does it snow the most in Peoria?

The month with the most snowfall in Peoria, Illinois, is January, when snow falls for 9 days and typically aggregates up to 2.36" (60mm) of snow.

How many days does it snow in January in Peoria?

In Peoria, Illinois, in January, during 9 snowfall days, 2.36" (60mm) of snow is typically accumulated.

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

In Peoria, Illinois, the average day length in January is 9h and 39min.

When are sunrise and sunset in January in Peoria?

In January, on the first day of the month, sunrise is at 7:22 am and sunset at 4:41 pm. On the last day of the month, in Peoria, Illinois, sunrise is at 7:09 am and sunset at 5:14 pm CST.

What is the month with the least sunshine in Peoria?

With an average of 4h of sunshine, January has the least sunshine of the year in Peoria, Illinois.

How many hours of sunshine does Peoria have in January?

In January, the average sunshine duration in Peoria is 4h.

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

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

What is the UV index intensity in January in Peoria?

The average daily maximum UV index in January in Peoria is 2. A UV Index estimate of 2, and below, represents 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
Peoria, IL

Average temperature in January - Peoria, IL
  • Average high temperature in January: 30.7°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (30.7°F).

  • Average low temperature in January: 18.9°F

The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

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Average pressure in January
Peoria, IL

Average pressure in January - Peoria, 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
Peoria, IL

Average wind speed in January - Peoria, IL
  • Average wind speed in January: 10.4mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

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Average humidity in January
Peoria, IL

Average humidity in January - Peoria, IL
  • Average humidity in January: 81%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in January
Peoria, IL

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

The wettest month (with the highest rainfall) is May (2.64").
The driest month (with the least rainfall) is January (0.75").

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Average rainfall days in January
Peoria, IL

Average rainfall days in January - Peoria, IL
  • Average rainfall days in January: 5.2 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (4.6 days).

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Average snowfall in January
Peoria, IL

Average snowfall in January - Peoria, IL
  • Average snowfall in January: 2.36"

The month with the highest snowfall is January (2.36").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Peoria, IL

Average snowfall days in January - Peoria, IL
  • Average snowfall days in January: 9 days

The month with the highest number of snowfall days is January (9 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
Peoria, IL

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

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in January: 4h and 0min

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 0min).

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Average sunshine days in January
Peoria, IL

Average sunshine days in January - Peoria, IL
  • Average sunshine days in January: 18.5 days

The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is May (11.3 days).

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Average UV index in January
Peoria, IL

Average UV index in January - Peoria, 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
Peoria, IL

Average cloud cover in January - Peoria, IL
  • Average cloud cover in January: 57

The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 29).

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Average visibility in January
Peoria, IL

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

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