nomadseason

December Weather in Discovery Bay, United States

Last updated: June 24, 2025

In Discovery Bay, United States, the average temperature in December hovers around 10°C (50°F), making it a refreshing time to explore. Expect the temperatures to range from a chilly -1°C (31°F) to a pleasant 23°C (74°F). During this month, anticipate 85 mm (3.3 in) of precipitation spread across 8 days, with an average humidity of 80%, adding to the atmospheric charm.

December Temperature in Discovery Bay

In December in Discovery Bay, the average temperature is 10°C (50°F), with maximums reaching up to 23°C (74°F) and minimums dropping as low as -1°C (31°F). This variation in temperature makes it essential for travelers to pack layered clothing to stay comfortable throughout the day.

December Weather in Discovery Bay: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Discovery Bay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Discovery Bay, December typically has an average temperature of 10°C (50°F), with highs reaching up to 23°C (74°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec505356626773747472655650
Data source: Temperature data for Discovery Bay 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 Discovery Bay

In Discovery Bay in December, the precipitation amount is 85 mm (3.3 in) over the course of 8 days.

December Precipitation Trends in Discovery Bay

The chart displays monthly precipitation patterns in Discovery Bay, 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 Discovery Bay, December typically receives around 85 mm (3.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec101857234151001283885
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Discovery Bay

In Discovery Bay in December, humidity is 80%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill enveloping you, making traveling somewhat uncomfortable as it seeps into your clothes and clings to your skin, leaving you longing for a cozy indoor refuge.

December Average Humidity in Discovery Bay

This chart illustrates the average monthly humidity levels in Discovery Bay, 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 Discovery Bay is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Discovery Bay

In Discovery Bay 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 Discovery Bay, you can check the information here.

Maximum UV Index Levels in Discovery Bay for December

The chart shows the monthly maximum UV Index (UVI) for Discovery Bay 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 Discovery Bay typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111109643
Data source: Discovery Bay 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 Discovery Bay Compares to Other Months

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

This table compares monthly weather conditions in Discovery Bay, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)101 mm (4.0 inches)82%moderate
February Weather12°C (53°F)85 mm (3.3 inches)84%moderate
March Weather14°C (57°F)72 mm (2.8 inches)82%very high
April Weather17°C (62°F)34 mm (1.3 inches)78%very high
May Weather20°C (68°F)15 mm (0.6 inches)71%very high
June Weather23°C (73°F)1 mm (0.1 inches)64%extreme
July Weather23°C (75°F)0 mm (0.0 inches)58%extreme
August Weather23°C (74°F)0 mm (0.0 inches)54%very high
September Weather22°C (72°F)1 mm (0.0 inches)55%very high
October Weather18°C (65°F)28 mm (1.1 inches)62%high
November Weather13°C (56°F)38 mm (1.5 inches)78%moderate
December Weather10°C (50°F)85 mm (3.3 inches)80%moderate

Compare Discovery Bay's Climate with Cities Worldwide