January weather forecast
Buffalo Grove, IL

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Weather in January

January, like December, is a freezing cold winter month in Buffalo Grove, Illinois, with an average temperature varying between 28°F (-2.2°C) and 17.6°F (-8°C).

Temperature

Buffalo Grove's coldest month, January, generally records average temperatures ranging from a high of 28°F (-2.2°C) to a low of 17.6°F (-8°C).

Humidity

With an average relative humidity of 83%, January is the most humid month.

Rainfall

In January, in Buffalo Grove, the rain falls for 6.5 days. Throughout January, 1.57" (40mm) of precipitation is accumulated. Throughout the year, there are 154.2 rainfall days, and 28.94" (735mm) 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 12.5 days and typically aggregates up to 4.8" (122mm) of snow.

Daylight

The average length of the day in January is 9h and 31min.
On the first day of January, sunrise is at 7:20 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 5:04 pm CST.

Sunshine

With an average of 3.7h of sunshine, January has the least sunshine of the year in Buffalo Grove.

UV index

In January, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 2 in January interprets into the following advice:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Updated: Jul 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year in Buffalo Grove?

Buffalo Grove, Illinois, experiences its average lowest temperatures in January, reaching a peak of 28°F (-2.2°C) and a minimum of 17.6°F (-8°C).

How cold is January?

The average high-temperature and low-temperature during January are 28°F (-2.2°C) and 17.6°F (-8°C) respectively.

What is the most humid month?

January is the most humid month, with an average relative humidity of 83%.

What is the average humidity in January?

The average relative humidity in January is 83%.

How many days does it rain in January?

In January, the rain falls for 6.5 days. Throughout January, 1.57" (40mm) of precipitation is accumulated.

When does it snow the most?

January is the month with the most snowfall. Snow falls for 12.5 days and accumulates 4.8" (122mm) of snow.

How many days does it snow in January?

In Buffalo Grove, in January, snow falls for 12.5 days, with typically accumulated 4.8" (122mm) of snow.

What is the average length of the day in January in Buffalo Grove?

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

When are sunrise and sunset in January in Buffalo Grove?

On the first day of January, sunrise is at 7:20 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 5:04 pm CST.

What is the month with the least sunshine?

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

How many hours of sunshine does Buffalo Grove have in January?

The average sunshine duration in January is 3.7h.

What is the UV index reading in January?

In Buffalo Grove, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a low health threat from unprotected exposure to UV radiation.
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
Buffalo Grove, IL

Average temperature in January - Buffalo Grove, IL
  • Average high temperature in January: 28°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (28°F).

  • Average low temperature in January: 17.6°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).

Average pressure in January
Buffalo Grove, IL

Average pressure in January - Buffalo Grove, 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
Buffalo Grove, IL

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

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

Average humidity in January
Buffalo Grove, IL

Average humidity in January - Buffalo Grove, IL
  • Average humidity in January: 83%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (73%).

Average rainfall in January
Buffalo Grove, IL

Average rainfall in January - Buffalo Grove, IL
  • Average rainfall in January: 1.57"

The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is December (1.34").

Average rainfall days in January
Buffalo Grove, IL

Average rainfall days in January - Buffalo Grove, IL
  • Average rainfall days in January: 6.5 days

The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (5.9 days).

Average snowfall in January
Buffalo Grove, IL

Average snowfall in January - Buffalo Grove, IL
  • Average snowfall in January: 4.8"

The month with the highest snowfall is January (4.8").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in January
Buffalo Grove, IL

Average snowfall days in January - Buffalo Grove, IL
  • Average snowfall days in January: 12.5 days

The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in January /
Average sunshine in January
Buffalo Grove, IL

Average daylight in January / Average sunshine in January - Buffalo Grove, 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 August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in January
Buffalo Grove, IL

Average sunshine days in January - Buffalo Grove, IL
  • Average sunshine days in January: 13.5 days

The month with the most sunshine days is November (15.7 days).
The month with the least sunshine days is April (10.3 days).

Average UV index in January
Buffalo Grove, IL

Average UV index in January - Buffalo Grove, IL
  • Average UV index in January: 2

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

Average cloud cover in January
Buffalo Grove, IL

Average cloud cover in January - Buffalo Grove, IL
  • Average cloud cover in January: 61

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in January
Buffalo Grove, IL

Average visibility in January - Buffalo Grove, 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).

Buffalo Grove, Illinois, USA

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