December Weather in Janos, Mexico

Last updated: August 27, 2025

In December, the average temperature in Janos, Mexico hovers around 9°C (48°F), with lows dipping to -4°C (25°F) and highs reaching a pleasant 24°C (75°F). Expect 23 mm (0.9 in) of precipitation over approximately 3 days, and prepare for a somewhat humid atmosphere with an average humidity of 85%.

December Temperature in Janos

In December in Janos, the average temperature is 9°C (48°F). The maximum can reach 24°C (75°F), and the minimum can be as low as -4°C (25°F). Pack layers to enjoy a range of temperatures while exploring the sights.

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

The chart illustrates December temperature patterns in Janos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Janos, December typically has an average temperature of 9°C (48°F), with highs reaching up to 24°C (75°F) and lows dropping to around -4°C (25°F).

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

December Precipitation in Janos

In Janos in December, the precipitation amount is 23 mm (0.9 in) over the course of 3 days.

December Precipitation Trends in Janos

The chart displays monthly precipitation patterns in Janos, 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 Janos, December typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 3 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 Janos

In Janos in December humidity is 85%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill enveloping you, making outdoor activities less enjoyable and requiring extra layers to stay warm and comfortable while traveling.

December Average Humidity in Janos

This chart illustrates the average monthly humidity levels in Janos, 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 Janos is approximately 85%, 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 Janos

In Janos 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 Janos.

Maximum UV Index Levels in Janos for December

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

Data source: Janos 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 Janos Compares to Other Months

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

This table compares monthly weather conditions in Janos, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	17 mm (0.7 inches)	79%	moderate
February Weather	11°C (52°F)	13 mm (0.5 inches)	76%	very high
March Weather	15°C (60°F)	13 mm (0.5 inches)	66%	very high
April Weather	20°C (68°F)	3 mm (0.1 inches)	51%	extreme
May Weather	24°C (76°F)	6 mm (0.2 inches)	42%	extreme
June Weather	29°C (84°F)	9 mm (0.4 inches)	37%	extreme
July Weather	27°C (82°F)	51 mm (2.0 inches)	51%	extreme
August Weather	27°C (81°F)	34 mm (1.3 inches)	64%	extreme
September Weather	24°C (76°F)	29 mm (1.1 inches)	74%	extreme
October Weather	20°C (67°F)	14 mm (0.6 inches)	71%	very high
November Weather	14°C (58°F)	14 mm (0.5 inches)	78%	high
December Weather	9°C (48°F)	23 mm (0.9 inches)	85%	moderate