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December Weather in Poway, United States

Last updated: June 24, 2025

In Poway, United States, the average temperature in December hovers around 13°C (55°F). Expect chilly nights with a minimum dipping to 2°C (36°F), while daytime can warm up to a maximum of 27°C (82°F). During this month, the area receives an average precipitation of 74 mm (2.9 in) spread across 6 days, and humidity levels are generally around 74%.

December Temperature in Poway

In December in Poway, the average temperature is 13°C (55°F). Maximums can reach 27°C (82°F), while minimums can drop to as low as 2°C (36°F). This makes Poway a versatile destination for travelers, offering pleasant days and cooler nights.

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

The chart illustrates December temperature patterns in Poway, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Poway, December typically has an average temperature of 13°C (55°F), with highs reaching up to 27°C (82°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec545456616368737572686155
Data source: Temperature data for Poway 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 Poway

In Poway in December, the total precipitation amount is 74 mm (2.9 in), spread over a period of 6 days.

December Precipitation Trends in Poway

The chart displays monthly precipitation patterns in Poway, 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 Poway, December typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec73887635304425153974
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Poway

In Poway in December, humidity is 74%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket wrapping around you, making outdoor activities somewhat uncomfortable and demanding frequent breaks in shaded areas.

December Average Humidity in Poway

This chart illustrates the average monthly humidity levels in Poway, 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 Poway is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%77%67%56%46%48%46%42%52%58%66%74%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Poway

In Poway in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Poway for better planning.

Maximum UV Index Levels in Poway for December

The chart shows the monthly maximum UV Index (UVI) for Poway 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 Poway typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469101112111010754
Data source: Poway 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 Poway Compares to Other Months

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

This table compares monthly weather conditions in Poway, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (55°F)73 mm (2.9 inches)72%moderate
February Weather12°C (55°F)88 mm (3.5 inches)77%high
March Weather14°C (57°F)76 mm (3.0 inches)67%very high
April Weather16°C (61°F)35 mm (1.4 inches)56%very high
May Weather17°C (63°F)30 mm (1.2 inches)46%extreme
June Weather20°C (68°F)4 mm (0.2 inches)48%extreme
July Weather23°C (74°F)4 mm (0.1 inches)46%extreme
August Weather24°C (75°F)2 mm (0.1 inches)42%very high
September Weather22°C (73°F)5 mm (0.2 inches)52%very high
October Weather20°C (68°F)15 mm (0.6 inches)58%high
November Weather16°C (62°F)39 mm (1.5 inches)66%moderate
December Weather13°C (55°F)74 mm (2.9 inches)74%moderate

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