January Weather in San Julian, Mexico

Last updated: August 27, 2025

In January, the average temperature in San Julian, Mexico hovers around 15°C (59°F), with variations ranging from a chilly 1°C (35°F) to a warm 28°C (82°F). Expect a moderate precipitation amount of 12 mm (0.5 in) over the course of about 2 days, while the air remains comfortably humid at an average of 74%.

January Temperature in San Julian

In January in San Julian, the average temperature is 15°C (59°F). The maximum can reach 28°C (82°F), while the minimum can drop to as low as 1°C (35°F). This makes it an ideal time for travelers to experience a pleasant range of temperatures, ensuring comfort whether exploring the outdoors or enjoying local attractions.

January Weather in San Julian: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in San Julian, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Julian, January typically has an average temperature of 15°C (59°F), with highs reaching up to 28°C (82°F) and lows dropping to around 1°C (35°F).

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

January Precipitation in San Julian

In San Julian in January, the precipitation amount is 12 mm (0.5 in) over the course of 2 days.

January Precipitation Trends in San Julian

The chart displays monthly precipitation patterns in San Julian, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In San Julian, January typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 2 days.

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

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Millimeters (mm) Inches (in)

January Humidity in San Julian

In San Julian in January, humidity is 74%. With an average temperature of 15°C (59°F), this humidity feels like traveling through a warm, sticky blanket that clings to your skin, making outdoor activities a bit uncomfortable and prompting you to seek out shaded areas or cool breezes.

January Average Humidity in San Julian

This chart illustrates the average monthly humidity levels in San Julian, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in San Julian is approximately 74%, offering insight into how humid the weather typically is during this month.

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

January UV Index in San Julian

In San Julian in January, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in San Julian.

Maximum UV Index Levels in San Julian for January

The chart shows the monthly maximum UV Index (UVI) for San Julian in January, 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 January, the maximum UV index in San Julian typically reaches 9, which falls under the very high exposure category.

Data source: San Julian January 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 January Weather in San Julian Compares to Other Months

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

This table compares monthly weather conditions in San Julian, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	15°C (59°F)	12 mm (0.5 inches)	74%	very high
February Weather	17°C (63°F)	13 mm (0.5 inches)	65%	extreme
March Weather	20°C (69°F)	7 mm (0.3 inches)	58%	extreme
April Weather	22°C (72°F)	3 mm (0.1 inches)	58%	extreme
May Weather	23°C (74°F)	30 mm (1.2 inches)	67%	extreme
June Weather	22°C (71°F)	156 mm (6.2 inches)	76%	extreme
July Weather	20°C (67°F)	219 mm (8.6 inches)	67%	extreme
August Weather	20°C (68°F)	178 mm (7.0 inches)	68%	extreme
September Weather	19°C (67°F)	195 mm (7.7 inches)	81%	extreme
October Weather	19°C (66°F)	71 mm (2.8 inches)	83%	extreme
November Weather	17°C (62°F)	20 mm (0.8 inches)	84%	very high
December Weather	15°C (59°F)	7 mm (0.3 inches)	81%	very high