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December Weather in Arnold, United States

Last updated: June 24, 2025

In December, the average temperature in Arnold, United States hovers around -1°C (30°F). While it can dip as low as -24°C (-11°F), there's also the rare chance to bask in highs of 21°C (71°F). Expect some precipitation, with an average of 33 mm (1.3 in) over 5 days, and note that the average humidity lingers at a comfortable 78%.

December Temperature in Arnold

In December in Arnold, the average temperature is -1°C (30°F). Maximum temperatures can reach 21°C (71°F), while minimums can drop as low as -24°C (-11°F). Be prepared for a wide range of temperatures, making it essential to pack accordingly for your trip.

December Weather in Arnold: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Arnold, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arnold, December typically has an average temperature of -1°C (30°F), with highs reaching up to 21°C (71°F) and lows dropping to around -24°C (-11°F).
JanFebMarAprMayJunJulAugSepOctNovDec262438465772757266483830
Data source: Temperature data for Arnold 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 Arnold

In Arnold in December, the precipitation amount is 33 mm (1.3 in) over the course of 5 days.

December Precipitation Trends in Arnold

The chart displays monthly precipitation patterns in Arnold, 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 Arnold, December typically receives around 33 mm (1.3 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec1723694813181827258542733
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Arnold

In Arnold in December humidity is 78%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that seeps into your bones, making traveling outdoors a brisk challenge.

December Average Humidity in Arnold

This chart illustrates the average monthly humidity levels in Arnold, 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 Arnold is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%80%64%64%76%79%77%79%70%64%75%78%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Arnold

In Arnold 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 Arnold, you can check the information here.

Maximum UV Index Levels in Arnold for December

The chart shows the monthly maximum UV Index (UVI) for Arnold 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 Arnold typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3568101111109643
Data source: Arnold 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 Arnold Compares to Other Months

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

This table compares monthly weather conditions in Arnold, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)17 mm (0.7 inches)73%moderate
February Weather-4°C (25°F)23 mm (0.9 inches)80%moderate
March Weather3°C (39°F)69 mm (2.7 inches)64%high
April Weather8°C (46°F)48 mm (1.9 inches)64%very high
May Weather14°C (58°F)131 mm (5.1 inches)76%very high
June Weather22°C (72°F)81 mm (3.2 inches)79%extreme
July Weather24°C (76°F)82 mm (3.2 inches)77%extreme
August Weather22°C (73°F)72 mm (2.8 inches)79%very high
September Weather19°C (67°F)58 mm (2.3 inches)70%very high
October Weather9°C (48°F)54 mm (2.1 inches)64%high
November Weather4°C (39°F)27 mm (1.1 inches)75%moderate
December Weather-1°C (30°F)33 mm (1.3 inches)78%moderate

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