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December Weather in Siloam Springs, United States

Last updated: June 24, 2025

In Siloam Springs, United States, the average temperature in December hovers around 6°C (44°F). Expect chilly nights with minimum temperatures dipping to -9°C (15°F), while daytime highs can reach a pleasant 24°C (75°F). This month also brings 70 mm (2.8 in) of precipitation, usually spread over 7 days, contributing to an average humidity of 87%. Prepare accordingly!

December Temperature in Siloam Springs

In December in Siloam Springs, the average temperature is 6°C (44°F). Maximums can reach 24°C (75°F), while minimums can drop as low as -9°C (15°F). Be prepared for a wide range of temperatures and pack accordingly for your travels.

December Weather in Siloam Springs: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Siloam Springs, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siloam Springs, December typically has an average temperature of 6°C (44°F), with highs reaching up to 24°C (75°F) and lows dropping to around -9°C (15°F).
JanFebMarAprMayJunJulAugSepOctNovDec384052576776807774604843
Data source: Temperature data for Siloam Springs generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Siloam Springs

In Siloam Springs in December, the precipitation amount is 70 mm (2.8 in) over a span of 7 days.

December Precipitation Trends in Siloam Springs

The chart displays monthly precipitation patterns in Siloam Springs, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Siloam Springs, December typically receives around 70 mm (2.8 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec849514318317589101153711626670
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Siloam Springs

In Siloam Springs in December humidity is 87%. With an average temperature of 6°C (44°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration uncomfortable without proper layers and preparation.

December Average Humidity in Siloam Springs

This chart illustrates the average monthly humidity levels in Siloam Springs, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Siloam Springs is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%78%76%78%83%83%78%68%64%70%83%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Siloam Springs

In Siloam Springs in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Siloam Springs, you can check the information here.

Maximum UV Index Levels in Siloam Springs for December

The chart shows the monthly maximum UV Index (UVI) for Siloam Springs in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Siloam Springs typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Siloam Springs December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Siloam Springs Compares to Other Months

Weather in Siloam Springs varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Siloam Springs, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Siloam Springs, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)84 mm (3.3 inches)81%moderate
February Weather5°C (41°F)95 mm (3.8 inches)78%high
March Weather11°C (52°F)143 mm (5.6 inches)76%high
April Weather14°C (57°F)183 mm (7.2 inches)78%very high
May Weather20°C (68°F)175 mm (6.9 inches)83%very high
June Weather25°C (76°F)88 mm (3.5 inches)83%extreme
July Weather26°C (80°F)101 mm (4.0 inches)78%extreme
August Weather25°C (77°F)153 mm (6.0 inches)68%very high
September Weather23°C (74°F)71 mm (2.8 inches)64%very high
October Weather16°C (60°F)162 mm (6.4 inches)70%high
November Weather9°C (48°F)66 mm (2.6 inches)83%moderate
December Weather6°C (44°F)70 mm (2.8 inches)87%moderate

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