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December Weather in Rancho Viejo, United States

Last updated: June 24, 2025

In December, the average temperature in Rancho Viejo, United States settles at a comfortable 18°C (65°F). However, you may experience a minimum of 1°C (34°F), occasionally reaching a maximum of 32°C (89°F). Expect about 26 mm (1.0 in) of precipitation spread over 5 days, while the air remains quite humid with an average humidity of 86%.

December Temperature in Rancho Viejo

In December in Rancho Viejo, the average temperature is 18°C (65°F). Maximums can reach 32°C (89°F) and minimums can be as low as 1°C (34°F). Be prepared for a wide range of temperatures and pack accordingly for your travels!

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

The chart illustrates December temperature patterns in Rancho Viejo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rancho Viejo, December typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (89°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec626571768184858682777065
Data source: Temperature data for Rancho Viejo 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 Viejo

In Rancho Viejo in December, the precipitation amount is 26 mm (1.0 in) over the course of 5 days.

December Precipitation Trends in Rancho Viejo

The chart displays monthly precipitation patterns in Rancho Viejo, 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 Viejo, December typically receives around 26 mm (1.0 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec31223927769211936116553526
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rancho Viejo

In Rancho Viejo in December humidity is 86%. With an average temperature of 18°C (65°F), this humidity feels like you’re wrapped in a warm, heavy blanket, making outdoor activities feel quite muggy and sticky for traveling.

December Average Humidity in Rancho Viejo

This chart illustrates the average monthly humidity levels in Rancho Viejo, 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 Viejo is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%78%81%82%74%68%67%75%78%83%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Rancho Viejo

In Rancho Viejo in December, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Rancho Viejo, you can refer to this Hourly UV Index in Rancho Viejo.

Maximum UV Index Levels in Rancho Viejo for December

The chart shows the monthly maximum UV Index (UVI) for Rancho Viejo 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 Viejo typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec69101112121212111076
Data source: Rancho Viejo 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 Viejo Compares to Other Months

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

This table compares monthly weather conditions in Rancho Viejo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (63°F)31 mm (1.2 inches)84%high
February Weather18°C (65°F)22 mm (0.9 inches)83%very high
March Weather22°C (71°F)39 mm (1.5 inches)78%very high
April Weather24°C (76°F)27 mm (1.1 inches)81%extreme
May Weather27°C (81°F)76 mm (3.0 inches)82%extreme
June Weather29°C (84°F)92 mm (3.6 inches)74%extreme
July Weather29°C (85°F)119 mm (4.7 inches)68%extreme
August Weather30°C (86°F)36 mm (1.4 inches)67%extreme
September Weather28°C (83°F)116 mm (4.6 inches)75%extreme
October Weather25°C (77°F)55 mm (2.2 inches)78%very high
November Weather21°C (70°F)35 mm (1.4 inches)83%high
December Weather18°C (65°F)26 mm (1.0 inches)86%high

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