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December Weather in San Ramon, Mexico

Last updated: August 27, 2025

In December, the average temperature in San Ramon, Mexico is a mild 13°C (55°F), with temperatures ranging from a cool -1°C (31°F) to a warm 25°C (78°F). Expect minimal precipitation at just 4 mm (0.2 in) over 0 days, and enjoy the comfortable average humidity of 74%.

December Temperature in San Ramon

In December in San Ramon, the average temperature is 13°C (55°F). Maximums can reach 25°C (78°F), and minimums can be as low as -1°C (31°F). This makes San Ramon an ideal destination for travelers who enjoy mild weather with occasional warmth and the chance for cooler days.

December Weather in San Ramon: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in San Ramon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Ramon, December typically has an average temperature of 13°C (55°F), with highs reaching up to 25°C (78°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec545862656665626362615755
Data source: Temperature data for San Ramon 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 San Ramon

In San Ramon in December, the precipitation amount is 4 mm (0.2 in) over the course of 0 days.

December Precipitation Trends in San Ramon

The chart displays monthly precipitation patterns in San Ramon, 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 San Ramon, December typically receives around 4 mm (0.2 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec8817185818521320421469264
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Ramon

In San Ramon 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 San Ramon

This chart illustrates the average monthly humidity levels in San Ramon, 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 San Ramon is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec70%64%54%61%75%83%83%85%85%79%76%75%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Ramon

In San Ramon in December, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in San Ramon.

Maximum UV Index Levels in San Ramon for December

The chart shows the monthly maximum UV Index (UVI) for San Ramon 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 San Ramon typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121415151414131412108
Data source: San Ramon 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 San Ramon Compares to Other Months

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

This table compares monthly weather conditions in San Ramon, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (55°F)8 mm (0.3 inches)70%very high
February Weather14°C (58°F)8 mm (0.3 inches)64%extreme
March Weather17°C (62°F)16 mm (0.6 inches)54%extreme
April Weather18°C (65°F)17 mm (0.7 inches)61%extreme
May Weather19°C (67°F)58 mm (2.3 inches)75%extreme
June Weather18°C (65°F)185 mm (7.3 inches)83%extreme
July Weather17°C (62°F)213 mm (8.4 inches)83%extreme
August Weather17°C (63°F)204 mm (8.0 inches)85%extreme
September Weather17°C (62°F)214 mm (8.4 inches)85%extreme
October Weather16°C (61°F)69 mm (2.7 inches)79%extreme
November Weather14°C (57°F)26 mm (1.0 inches)76%very high
December Weather13°C (55°F)4 mm (0.2 inches)74%very high

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