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December Weather in Prineville, United States

Last updated: June 24, 2025

In December, the average temperature in Prineville, United States hovers around 1°C (33°F). Expect a wide range, with minimums dipping to -18°C (0°F) and maximums reaching up to 17°C (63°F). Prepare for some moisture, as the area receives around 65 mm (2.6 in) of precipitation over 14 days. Additionally, you can expect a high level of humidity at 88%, making the air feel quite brisk!

December Temperature in Prineville

In December in Prineville, the average temperature is 1°C (33°F). Maximum temperatures can reach 17°C (63°F), while minimums can drop as low as -18°C (0°F). Be prepared for extreme variations in temperature during your travels, so pack accordingly!

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

The chart illustrates December temperature patterns in Prineville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Prineville, December typically has an average temperature of 1°C (33°F), with highs reaching up to 17°C (63°F) and lows dropping to around -18°C (0°F).
JanFebMarAprMayJunJulAugSepOctNovDec333439455463727161483933
Data source: Temperature data for Prineville 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 Prineville

In Prineville in December, the precipitation amount is 65 mm (2.6 in) over the course of 14 days.

December Precipitation Trends in Prineville

The chart displays monthly precipitation patterns in Prineville, 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 Prineville, December typically receives around 65 mm (2.6 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec6481545838203825425965
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Prineville

In Prineville in December humidity is 88%. With an average temperature of 1°C (33°F), this humidity feels like a damp chill wrapping around you, making it difficult to stay warm while traveling, as each breath carries a heavy, cold moisture that clings to your skin.

December Average Humidity in Prineville

This chart illustrates the average monthly humidity levels in Prineville, 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 Prineville is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%87%86%85%80%82%79%63%59%78%88%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Prineville

In Prineville in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Prineville, you can visit Hourly UV Index in Prineville.

Maximum UV Index Levels in Prineville for December

The chart shows the monthly maximum UV Index (UVI) for Prineville 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 Prineville typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468101010108632
Data source: Prineville 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 Prineville Compares to Other Months

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

This table compares monthly weather conditions in Prineville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)64 mm (2.5 inches)86%moderate
February Weather1°C (34°F)81 mm (3.2 inches)87%moderate
March Weather4°C (39°F)54 mm (2.1 inches)86%high
April Weather7°C (46°F)58 mm (2.3 inches)85%very high
May Weather12°C (54°F)38 mm (1.5 inches)80%very high
June Weather17°C (63°F)19 mm (0.8 inches)82%very high
July Weather22°C (72°F)2 mm (0.1 inches)78%very high
August Weather21°C (71°F)8 mm (0.3 inches)62%very high
September Weather16°C (61°F)25 mm (1.0 inches)59%very high
October Weather9°C (48°F)42 mm (1.6 inches)78%high
November Weather4°C (40°F)59 mm (2.3 inches)88%moderate
December Weather1°C (33°F)65 mm (2.6 inches)88%low

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