December weather forecast
Fletcher, IL

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Weather in December

December, the first month of the winter in Fletcher, is also an icy month, with temperature in the range of an average high of 36.5°F (2.5°C) and an average low of 26.1°F (-3.3°C).

Temperature

Observing a mild shift, the average high-temperature during December reduces from November's frosty 47.7°F (8.7°C) to a cold 36.5°F (2.5°C). Fletcher in December experiences a low-temperature average of 26.1°F (-3.3°C).

Humidity

In Fletcher, Illinois, the average relative humidity in December is 80%.

Rainfall

December is the month with the least rainfall. Rain falls for 9 days and accumulates 1.93" (49mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December. In Fletcher, Illinois, in December, snow falls for 8.2 days, with typically accumulated 2.64" (67mm) of snow. In Fletcher, during the entire year, snow falls for 40.7 days and aggregates up to 17.01" (432mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 6:59 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:38 pm CST.

Sunshine

In Fletcher, the average sunshine in December is 4.2h.

UV index

January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily maximum UV index of 2 in December interprets into the following advice:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Updated: Jul 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

December temperatures vary between a high-temperature of 36.5°F (2.5°C) and a low-temperature of 26.1°F (-3.3°C). In July, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, is calculated to be 87.8°F (31°C).

What is the average humidity in December?

In Fletcher, the average relative humidity in December is 80%.

What is the driest month?

The month with the least rainfall is December, when the rain falls for 9 days and typically collects 1.93" (49mm) of precipitation.

How many days does it rain in December?

In Fletcher, in December, it is raining for 9 days, with typically 1.93" (49mm) of accumulated precipitation.

How many days does it snow in December?

In Fletcher, Illinois, in December, snow falls for 8.2 days, with typically accumulated 2.64" (67mm) of snow.

What is the month with the shortest days?

With an average of 9h and 18min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In Fletcher, the average day length in December is 9h and 20min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 6:59 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:38 pm CST.

How many hours of sunshine does Fletcher have in December?

In December, the average sunshine duration is 4.2h.

What are the months with the lowest UV index?

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

What is the UV index reading in December?

In Fletcher, Illinois, the average daily maximum UV index in December is 2. A UV Index estimate 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 December
Fletcher, IL

Average temperature in December - Fletcher, IL
  • Average high temperature in December: 36.5°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.7°F).

  • Average low temperature in December: 26.1°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

Average pressure in December
Fletcher, IL

Average pressure in December - Fletcher, IL
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Fletcher, IL

Average wind speed in December - Fletcher, IL
  • Average wind speed in December: 10.6mph

The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

Average humidity in December
Fletcher, IL

Average humidity in December - Fletcher, IL
  • Average humidity in December: 80%

The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December
Fletcher, IL

Average rainfall in December - Fletcher, IL
  • Average rainfall in December: 1.93"

The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is December (1.93").

Average rainfall days in December
Fletcher, IL

Average rainfall days in December - Fletcher, IL
  • Average rainfall days in December: 9 days

The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is February (6.9 days).

Average snowfall in December
Fletcher, IL

Average snowfall in December - Fletcher, IL
  • Average snowfall in December: 2.64"

The month with the highest snowfall is January (5.04").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Fletcher, IL

Average snowfall days in December - Fletcher, IL
  • Average snowfall days in December: 8.2 days

The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Fletcher, IL

Average daylight in December / Average sunshine in December - Fletcher, IL
  • Average daylight in December: 9h and 2min

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 December: 4h and 1min

The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in December
Fletcher, IL

Average sunshine days in December - Fletcher, IL
  • Average sunshine days in December: 15 days

The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is May (8.4 days).

Average UV index in December
Fletcher, IL

Average UV index in December - Fletcher, IL
  • Average UV index in December: 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, October, November and December (UV index 2).

Average cloud cover in December
Fletcher, IL

Average cloud cover in December - Fletcher, IL
  • Average cloud cover in December: 56

The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 33).

Average visibility in December
Fletcher, IL

Average visibility in December - Fletcher, IL
  • Average visibility in December: 6mi

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

Fletcher, Illinois, USA

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