December weather forecast
Siloam Springs, AR

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Weather in December

December makes its entrance with undeniable winter charm, driving temperatures even lower in Siloam Springs. Relative humidity maintains balance, offsetting the dryness usually associated with the cold season. The end of the year brings the highest recorded snowfall of 0.59" (15mm), truing up to the winter season. Further, December is the cloudiest month, shielding the city under an overall cloud coverage of 41%. Despite the climactic severity, the holiday season in December paints a merry, festive mood across Siloam Springs.

Temperature

With the beginning of December, the average high-temperature in Siloam Springs shows a decrease, transitioning from a refreshing 57.2°F (14°C) in November to a frosty 47.1°F (8.4°C). In the month of December, the temperature generally rests at an average low of 32.2°F (0.1°C).

Humidity

In December, the average relative humidity in Siloam Springs is 74%.

Rainfall

In Siloam Springs, in December, during 8.9 rainfall days, 2.13" (54mm) of precipitation is typically accumulated. In Siloam Springs, during the entire year, the rain falls for 156 days and collects up to 34.41" (874mm) of precipitation.

Snowfall

January through March, May, November and December are months with snowfall. In Siloam Springs, during December, snow falls for 2.4 days and regularly aggregates up to 0.59" (15mm) of snow. Throughout the year, in Siloam Springs, there are 12.2 snowfall days, and 4.21" (107mm) of snow is accumulated.

Daylight

With an average of 9h and 42min of daylight, December has the shortest days of the year in Siloam Springs, Arkansas.
On the first day of the month, sunrise is at 7:11 am and sunset at 5:03 pm. On the last day of December, sunrise is at 7:29 am and sunset at 5:13 pm CST.

Sunshine

January and December, with an average of 5.4h of sunshine, are months with the least sunshine.

UV index

January and 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 minimal health hazard from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 2 during December leads to these advisories:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
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Frequently asked questions

What is the usual temperature for Siloam Springs in December?

December temperatures in Siloam Springs vary between a high-temperature of 47.1°F (8.4°C) and a low-temperature of 32.2°F (0.1°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in September is evaluated at 86°F (30°C).

What is the average humidity in December in Siloam Springs?

In Siloam Springs, Arkansas, the average relative humidity in December is 74%.

How much does it rain in Siloam Springs in December?

In December, in Siloam Springs, the rain falls for 8.9 days. Throughout December, 2.13" (54mm) of precipitation is accumulated.

How much does it snow in Siloam Springs in December?

In Siloam Springs, during December, snow falls for 2.4 days and regularly aggregates up to 0.59" (15mm) of snow.

What is the month with the shortest days in Siloam Springs?

The month with the shortest days is December, with an average of 9h and 42min of daylight.

How many hours of daylight does Siloam Springs have in December?

The average day length in December is 9h and 45min.

When are sunrise and sunset in December in Siloam Springs?

In December, on the first day of the month, sunrise is at 7:11 am and sunset at 5:03 pm. On the last day of the month, in Siloam Springs, sunrise is at 7:29 am and sunset at 5:13 pm CST.

What are the months with the least sunshine in Siloam Springs?

January and December, with an average of 5.4h of sunshine, are months with the least sunshine in Siloam Springs, Arkansas.

How long on average sun shines in December in Siloam Springs?

The average sunshine duration in December in Siloam Springs, Arkansas, is 5.4h.

What is the month with the lowest UV index in Siloam Springs?

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

What is the UV index intensity in December in Siloam Springs?

The average daily maximum UV index in December in Siloam Springs, Arkansas, is 2. A UV Index reading of 2, and below, represents a low health threat from 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 December
Siloam Springs, AR

Average temperature in December - Siloam Springs, AR
  • Average high temperature in December: 47.1°F

The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (44.4°F).

  • Average low temperature in December: 32.2°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).

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Average pressure in December
Siloam Springs, AR

Average pressure in December - Siloam Springs, AR
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are April and June (29.93"Hg).

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Average wind speed in December
Siloam Springs, AR

Average wind speed in December - Siloam Springs, AR
  • Average wind speed in December: 8.8mph

The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

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Average humidity in December
Siloam Springs, AR

Average humidity in December - Siloam Springs, AR
  • Average humidity in December: 74%

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are August and October (71%).

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Average rainfall in December
Siloam Springs, AR

Average rainfall in December - Siloam Springs, AR
  • Average rainfall in December: 2.13"

The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is February (1.73").

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Average rainfall days in December
Siloam Springs, AR

Average rainfall days in December - Siloam Springs, AR
  • Average rainfall days in December: 8.9 days

The months with the highest number of rainy days are May and July (16.8 days).
The month with the least rainy days is January (8.8 days).

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Average snowfall in December
Siloam Springs, AR

Average snowfall in December - Siloam Springs, AR
  • Average snowfall in December: 0.59"

The month with the highest snowfall is February (1.14").
The months with the least snowfall are April, June, July, August, September and October (0").

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Average snowfall days in December
Siloam Springs, AR

Average snowfall days in December - Siloam Springs, AR
  • Average snowfall days in December: 2.4 days

The months with the highest number of snowfall days are January and February (3.3 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in December /
Average sunshine in December
Siloam Springs, AR

Average daylight in December / Average sunshine in December - Siloam Springs, AR
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in December: 5h and 2min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).

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Average sunshine days in December
Siloam Springs, AR

Average sunshine days in December - Siloam Springs, AR
  • Average sunshine days in December: 19 days

The month with the most sunshine days is December (19 days).
The month with the least sunshine days is July (11.2 days).

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Average UV index in December
Siloam Springs, AR

Average UV index in December - Siloam Springs, AR
  • Average UV index in December: 2

The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in December
Siloam Springs, AR

Average cloud cover in December - Siloam Springs, AR
  • Average cloud cover in December: 41

The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 24).

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Average visibility in December
Siloam Springs, AR

Average visibility in December - Siloam Springs, AR
  • Average visibility in December: 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).

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Siloam Springs, Arkansas, USA

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