December Weather in San Isidro, Mexico

Last updated: August 27, 2025

In December, the average temperature in San Isidro, Mexico is a pleasant 17°C (63°F). You can expect temperatures to range from a cool 3°C (38°F) to a warm 28°C (84°F). Additionally, prepare for a bit of drizzle with an average precipitation of 8 mm (0.3 in) over 1 day and a humidity level of 74%, making it a moderately humid month.

December Temperature in San Isidro

In December in San Isidro, the average temperature is 17°C (63°F). Maximums can reach 28°C (84°F), while minimums can drop as low as 3°C (38°F). It's a great time to explore San Isidro, so pack layers to enjoy both the warm days and cooler evenings.

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

The chart illustrates December temperature patterns in San Isidro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Isidro, December typically has an average temperature of 17°C (63°F), with highs reaching up to 28°C (84°F) and lows dropping to around 3°C (38°F).

Data source: Temperature data for San Isidro generated using information from the Copernicus Climate Change Service.

December Precipitation in San Isidro

In San Isidro in December, the precipitation amount is 8 mm (0.3 in) over the course of 1 day.

December Precipitation Trends in San Isidro

The chart displays monthly precipitation patterns in San Isidro, 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 Isidro, December typically receives around 8 mm (0.3 inches) of precipitation spread over approximately 1 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

December Humidity in San Isidro

In San Isidro in December, humidity is 74%. With an average temperature of 17°C (63°F), this humidity feels like a gentle embrace, making outdoor exploration comfortable yet slightly enveloped in warmth, perfect for leisurely strolls but requiring ample hydration for prolonged activities.

December Average Humidity in San Isidro

This chart illustrates the average monthly humidity levels in San Isidro, 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 Isidro is approximately 74%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Isidro

In San Isidro 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 Isidro.

Maximum UV Index Levels in San Isidro for December

The chart shows the monthly maximum UV Index (UVI) for San Isidro 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 Isidro typically reaches 8, which falls under the very high exposure category.

Data source: San Isidro 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 Isidro Compares to Other Months

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

This table compares monthly weather conditions in San Isidro, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	17°C (63°F)	7 mm (0.3 inches)	64%	very high
February Weather	19°C (66°F)	12 mm (0.5 inches)	57%	extreme
March Weather	22°C (71°F)	3 mm (0.1 inches)	46%	extreme
April Weather	23°C (74°F)	1 mm (0.0 inches)	42%	extreme
May Weather	25°C (77°F)	20 mm (0.8 inches)	51%	extreme
June Weather	24°C (75°F)	110 mm (4.3 inches)	74%	extreme
July Weather	22°C (71°F)	235 mm (9.3 inches)	79%	extreme
August Weather	22°C (71°F)	210 mm (8.3 inches)	81%	extreme
September Weather	21°C (70°F)	201 mm (7.9 inches)	84%	extreme
October Weather	21°C (69°F)	68 mm (2.7 inches)	75%	extreme
November Weather	19°C (66°F)	20 mm (0.8 inches)	71%	very high
December Weather	17°C (63°F)	8 mm (0.3 inches)	74%	very high