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December Weather in Rancho Murieta, United States

Last updated: June 24, 2025

In December, the average temperature in Rancho Murieta, United States hovers around 9°C (48°F). Expect a range from a chilly -1°C (30°F) to a warm 22°C (73°F). This month is also marked by significant rainfall, with 129 mm (5.1 in) spread over 10 days. Additionally, the air carries a high average humidity of 83%, creating a cool, damp atmosphere.

December Temperature in Rancho Murieta

In December in Rancho Murieta, the average temperature is 9°C (48°F). The maximum can reach 22°C (73°F), and the minimum can be as low as -1°C (30°F). Be prepared for a range of temperatures to make the most of your travels during this time.

December Weather in Rancho Murieta: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Rancho Murieta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rancho Murieta, December typically has an average temperature of 9°C (48°F), with highs reaching up to 22°C (73°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec495054606674787773645448
Data source: Temperature data for Rancho Murieta 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 Rancho Murieta

In Rancho Murieta in December, the precipitation amount is 129 mm (5.1 in) over a span of 10 days.

December Precipitation Trends in Rancho Murieta

The chart displays monthly precipitation patterns in Rancho Murieta, 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 Rancho Murieta, December typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec158147160753740074481130
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rancho Murieta

In Rancho Murieta in December humidity is 83%. With an average temperature of 9°C (48°F), this humidity feels like an enveloping blanket, making outdoor activities quite uncomfortable and encouraging travelers to seek shelter or shade frequently.

December Average Humidity in Rancho Murieta

This chart illustrates the average monthly humidity levels in Rancho Murieta, 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 Rancho Murieta is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%83%81%74%64%44%37%44%65%84%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Rancho Murieta

In Rancho Murieta 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 Rancho Murieta, you can check the information here.

Maximum UV Index Levels in Rancho Murieta for December

The chart shows the monthly maximum UV Index (UVI) for Rancho Murieta 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 Rancho Murieta typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3578101111109643
Data source: Rancho Murieta 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 Rancho Murieta Compares to Other Months

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

This table compares monthly weather conditions in Rancho Murieta, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)158 mm (6.2 inches)84%moderate
February Weather10°C (51°F)147 mm (5.8 inches)84%moderate
March Weather12°C (54°F)160 mm (6.3 inches)83%high
April Weather16°C (60°F)75 mm (2.9 inches)81%very high
May Weather19°C (66°F)37 mm (1.4 inches)74%very high
June Weather23°C (74°F)4 mm (0.1 inches)64%extreme
July Weather26°C (78°F)0 mm (0.0 inches)44%extreme
August Weather25°C (77°F)0 mm (0.0 inches)36%very high
September Weather23°C (73°F)7 mm (0.3 inches)44%very high
October Weather18°C (64°F)44 mm (1.7 inches)65%high
November Weather12°C (54°F)81 mm (3.2 inches)84%moderate
December Weather9°C (48°F)129 mm (5.1 inches)83%moderate

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