January weather forecast
Flanagan, IL

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Weather in January

January, the same as December, in Flanagan, Illinois, is another subzero cold winter month, with temperature in the range of an average low of 18.5°F (-7.5°C) and an average high of 30.2°F (-1°C).

Temperature

Flanagan's January weather, with an average high temperature of 30.2°F (-1°C) and an average low temperature of 18.5°F (-7.5°C), tends to be the coldest of the year.

Humidity

In January, the average relative humidity in Flanagan is 82%.

Rainfall

January and February are months with the least rain when the rain falls for 4.3 days and typically aggregates up to 0.71" (18mm) of rain.

Snowfall

January through April, October through December are months with snowfall in Flanagan. January is the month with the most snowfall in Flanagan. Snow falls for 10.2 days and accumulates 1.73" (44mm) of snow.

Daylight

In January, the average length of the day is 9h and 38min.
On the first day of January in Flanagan, Illinois, sunrise is at 7:19 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 5:10 pm CST.

Sunshine

The month with the least sunshine in Flanagan is January, with an average of 3.8h of sunshine.

UV index

In Flanagan, the average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index of 2 during January leads to these instructions:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month in Flanagan?

The coldest period is January, when temperatures fluctuate between an average high of 30.2°F (-1°C) and a low of 18.5°F (-7.5°C).

How cold is January in Flanagan?

An average high-temperature, in January, in Flanagan, is 30.2°F (-1°C) and the average low-temperature is 18.5°F (-7.5°C).

What is the average humidity in January in Flanagan?

The average relative humidity in January in Flanagan, Illinois, is 82%.

What is the driest month in Flanagan?

January and February are months with the least rain in Flanagan when the rain falls for 4.3 days and typically aggregates up to 0.71" (18mm) of rain.

How much does it rain in Flanagan in January?

In Flanagan, Illinois, in January, during 4.3 rainfall days, 0.71" (18mm) of precipitation is typically accumulated.

What is the snowiest month in Flanagan?

The month with the most snowfall is January, when snow falls for 10.2 days and typically aggregates up to 1.73" (44mm) of snow.

How much does it snow in Flanagan in January?

In Flanagan, during January, snow falls for 10.2 days and regularly aggregates up to 1.73" (44mm) of snow.

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

In Flanagan, Illinois, the average day length in January is 9h and 38min.

When are sunrise and sunset in January in Flanagan?

In January, on the first day of the month, sunrise is at 7:19 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 5:10 pm CST.

What is the month with the least sunshine in Flanagan?

The month with the least sunshine in Flanagan is January, with an average of 3.8h of sunshine.

How many hours of sunshine does Flanagan have in January?

The average sunshine duration in January in Flanagan is 3.8h.

What is the UV index reading in January in Flanagan?

In January, the average daily maximum UV index in Flanagan, Illinois, is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability 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
Flanagan, IL

Average temperature in January - Flanagan, IL
  • Average high temperature in January: 30.2°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.2°F).

  • Average low temperature in January: 18.5°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).

Average pressure in January
Flanagan, IL

Average pressure in January - Flanagan, IL
  • Average pressure in January: 30.13"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in January
Flanagan, IL

Average wind speed in January - Flanagan, IL
  • Average wind speed in January: 10.7mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

Average humidity in January
Flanagan, IL

Average humidity in January - Flanagan, IL
  • Average humidity in January: 82%

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).

Average rainfall in January
Flanagan, IL

Average rainfall in January - Flanagan, IL
  • Average rainfall in January: 0.71"

The wettest month (with the highest rainfall) is May (2.44").
The driest months (with the least rainfall) are January and February (0.71").

Average rainfall days in January
Flanagan, IL

Average rainfall days in January - Flanagan, IL
  • Average rainfall days in January: 4.3 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (4.3 days).

Average snowfall in January
Flanagan, IL

Average snowfall in January - Flanagan, IL
  • Average snowfall in January: 1.73"

The month with the highest snowfall is January (1.73").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in January
Flanagan, IL

Average snowfall days in January - Flanagan, 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).

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

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

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in January: 3h and 5min

The months with the most sunshine are June and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in January
Flanagan, IL

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

The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is July (11.3 days).

Average UV index in January
Flanagan, IL

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

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

Average cloud cover in January
Flanagan, IL

Average cloud cover in January - Flanagan, IL
  • Average cloud cover in January: 59

The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).

Average visibility in January
Flanagan, IL

Average visibility in January - Flanagan, 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).

Flanagan, Illinois, USA

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