December Weather in Hermosillo, Mexico

Last updated: August 27, 2025

In Hermosillo, Mexico, the average temperature in December hovers around 17°C (62°F). Expect a range, with minimums dropping to 2°C (37°F) and highs reaching up to 31°C (87°F). This month also brings 12 mm (0.5 in) of precipitation over 1 day, and you can anticipate an average humidity of 81%.

December Temperature in Hermosillo

In December in Hermosillo, the average temperature is 17°C (62°F). Maximums can reach 31°C (87°F), and minimums can drop to 2°C (37°F). This makes Hermosillo an ideal destination for travelers seeking a mix of warm days and cooler nights.

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

The chart illustrates December temperature patterns in Hermosillo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hermosillo, December typically has an average temperature of 17°C (62°F), with highs reaching up to 31°C (87°F) and lows dropping to around 2°C (37°F).

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

December Precipitation in Hermosillo

In Hermosillo in December, the precipitation amount is 12 mm (0.5 in) over the course of 1 day.

December Precipitation Trends in Hermosillo

The chart displays monthly precipitation patterns in Hermosillo, 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 Hermosillo, December typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 1 days.

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

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Millimeters (mm) Inches (in)

December Humidity in Hermosillo

In Hermosillo in December, humidity is 81%. With an average temperature of 17°C (62°F), this humidity feels like a warm blanket enveloping you, making outdoor adventures feel sticky and requiring frequent breaks to stay comfortable while exploring.

December Average Humidity in Hermosillo

This chart illustrates the average monthly humidity levels in Hermosillo, 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 Hermosillo is approximately 81%, 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 Hermosillo

In Hermosillo in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Hermosillo.

Maximum UV Index Levels in Hermosillo for December

The chart shows the monthly maximum UV Index (UVI) for Hermosillo 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 Hermosillo typically reaches 5, which falls under the moderate exposure category.

Data source: Hermosillo 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 Hermosillo Compares to Other Months

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

This table compares monthly weather conditions in Hermosillo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (62°F)	17 mm (0.7 inches)	76%	moderate
February Weather	18°C (64°F)	14 mm (0.6 inches)	68%	very high
March Weather	20°C (69°F)	13 mm (0.5 inches)	56%	very high
April Weather	25°C (77°F)	0 mm (0.0 inches)	42%	extreme
May Weather	27°C (81°F)	0 mm (0.0 inches)	36%	extreme
June Weather	32°C (90°F)	5 mm (0.2 inches)	33%	extreme
July Weather	33°C (91°F)	51 mm (2.0 inches)	47%	extreme
August Weather	33°C (91°F)	42 mm (1.7 inches)	71%	extreme
September Weather	30°C (87°F)	47 mm (1.9 inches)	80%	extreme
October Weather	27°C (81°F)	17 mm (0.7 inches)	73%	very high
November Weather	22°C (72°F)	15 mm (0.6 inches)	75%	high
December Weather	17°C (62°F)	12 mm (0.5 inches)	81%	moderate