nomadseason

December Weather in Caldwell, United States

Last updated: June 24, 2025

In December, the average temperature in Caldwell, United States hovers around 5°C (41°F), with extremes ranging from a chilly -12°C (10°F) to a warm 25°C (78°F). Expect about 30 mm (1.2 in) of precipitation over the course of 3 days, contributing to an average humidity of 83%.

December Temperature in Caldwell

In December in Caldwell, the average temperature is 5°C (41°F), with maximums reaching 25°C (78°F) and minimums dropping as low as -12°C (10°F). It's advisable to pack layers to accommodate the wide temperature range while traveling during this time.

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

The chart illustrates December temperature patterns in Caldwell, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Caldwell, December typically has an average temperature of 5°C (41°F), with highs reaching up to 25°C (78°F) and lows dropping to around -12°C (10°F).
JanFebMarAprMayJunJulAugSepOctNovDec363751576879828075604741
Data source: Temperature data for Caldwell generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Caldwell

In Caldwell in December, the precipitation amount is 30 mm (1.2 in) over the course of 3 days.

December Precipitation Trends in Caldwell

The chart displays monthly precipitation patterns in Caldwell, 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 Caldwell, December typically receives around 30 mm (1.2 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec443188891721235296771272530
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Caldwell

In Caldwell in December humidity is 83%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and necessitating extra layers to stay warm and dry.

December Average Humidity in Caldwell

This chart illustrates the average monthly humidity levels in Caldwell, 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 Caldwell is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%76%67%70%82%82%81%76%67%72%80%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Caldwell

In Caldwell 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 Caldwell, you can check the information here.

Maximum UV Index Levels in Caldwell for December

The chart shows the monthly maximum UV Index (UVI) for Caldwell 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 Caldwell typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Caldwell 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 Caldwell Compares to Other Months

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

This table compares monthly weather conditions in Caldwell, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)44 mm (1.7 inches)75%moderate
February Weather3°C (37°F)31 mm (1.2 inches)76%high
March Weather10°C (51°F)88 mm (3.5 inches)67%high
April Weather14°C (58°F)89 mm (3.5 inches)70%very high
May Weather20°C (68°F)172 mm (6.8 inches)82%very high
June Weather26°C (79°F)123 mm (4.8 inches)82%extreme
July Weather28°C (82°F)51 mm (2.0 inches)81%extreme
August Weather26°C (80°F)96 mm (3.8 inches)76%very high
September Weather24°C (75°F)77 mm (3.0 inches)67%very high
October Weather15°C (60°F)127 mm (5.0 inches)72%high
November Weather9°C (48°F)25 mm (1.0 inches)80%moderate
December Weather5°C (41°F)30 mm (1.2 inches)83%moderate

Compare Caldwell's Climate with Cities Worldwide