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December Weather in Laguna, United States

Last updated: June 24, 2025

In December, the average temperature in Laguna, United States hovers around 1°C (34°F), with potential extremes ranging from a brisk -20°C (-3°F) to a mild 17°C (64°F). Expect 13 mm (0.5 in) of precipitation over 2 days, contributing to a relatively high average humidity of 82%. Whether you're bundling up or enjoying the occasional warm spell, it's a month of diverse weather!

December Temperature in Laguna

In December in Laguna, the average temperature is 1°C (34°F), with maximums reaching up to 17°C (64°F) and minimums plummeting as low as -20°C (-3°F). Travelers should be prepared for a wide range of temperatures, packing both warm clothing for the chill and lighter layers for the occasional mild day.

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

The chart illustrates December temperature patterns in Laguna, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Laguna, December typically has an average temperature of 1°C (34°F), with highs reaching up to 17°C (64°F) and lows dropping to around -20°C (-3°F).
JanFebMarAprMayJunJulAugSepOctNovDec323746546374757468544434
Data source: Temperature data for Laguna 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 Laguna

In Laguna in December, the precipitation amount is 13 mm (0.5 in) over a span of 2 days.

December Precipitation Trends in Laguna

The chart displays monthly precipitation patterns in Laguna, 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 Laguna, December typically receives around 13 mm (0.5 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec201720151012372330261213
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Laguna

In Laguna in December humidity is 82%. With an average temperature of 1°C (34°F), this humidity feels like walking through a thick fog, making it challenging to stay warm and comfortable while traveling.

December Average Humidity in Laguna

This chart illustrates the average monthly humidity levels in Laguna, 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 Laguna is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%83%71%61%48%36%37%46%62%74%82%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Laguna

In Laguna 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 Laguna for better planning.

Maximum UV Index Levels in Laguna for December

The chart shows the monthly maximum UV Index (UVI) for Laguna 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 Laguna typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111213131211864
Data source: Laguna 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 Laguna Compares to Other Months

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

This table compares monthly weather conditions in Laguna, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)20 mm (0.8 inches)81%moderate
February Weather3°C (37°F)17 mm (0.7 inches)83%high
March Weather8°C (46°F)20 mm (0.8 inches)71%very high
April Weather12°C (55°F)15 mm (0.6 inches)61%extreme
May Weather17°C (64°F)10 mm (0.4 inches)48%extreme
June Weather23°C (74°F)12 mm (0.5 inches)36%extreme
July Weather24°C (75°F)37 mm (1.5 inches)37%extreme
August Weather23°C (74°F)22 mm (0.9 inches)46%extreme
September Weather20°C (68°F)30 mm (1.2 inches)62%extreme
October Weather12°C (55°F)26 mm (1.0 inches)74%very high
November Weather7°C (44°F)12 mm (0.5 inches)82%high
December Weather1°C (34°F)13 mm (0.5 inches)82%moderate

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