January Weather in Rosario, Mexico

Last updated: August 27, 2025

In Rosario, Mexico, the average temperature in January hovers around 16°C (61°F), offering a delightful climate. However, be prepared for temperature fluctuations, as it can dip to a chilly 0°C (32°F) or rise to a warm 32°C (90°F). Expect around 27 mm (1.1 in) of precipitation over just 2 days, with an average humidity of 74%, creating a vibrant yet comfortable atmosphere.

January Temperature in Rosario

In January in Rosario, the average temperature is 16°C (61°F). The maximum can reach 32°C (90°F) and the minimum can be as low as 0°C (32°F). Be prepared for a diverse range of weather conditions while traveling, as it can vary significantly from warm days to chilly nights.

January Weather in Rosario: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Rosario, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rosario, January typically has an average temperature of 16°C (61°F), with highs reaching up to 32°C (90°F) and lows dropping to around 0°C (32°F).

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

January Precipitation in Rosario

In Rosario in January, the precipitation amount is 27 mm (1.1 in) over the course of 2 days.

January Precipitation Trends in Rosario

The chart displays monthly precipitation patterns in Rosario, 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 Rosario, January typically receives around 27 mm (1.1 inches) of precipitation spread over approximately 2 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Rosario

In Rosario in January humidity is 74%. With an average temperature of 16°C (61°F), this humidity feels like a damp blanket wrapping around you, making traveling quite uncomfortable as the air feels thick and muggy, potentially leading to fatigue and a longing for a cool breeze.

January Average Humidity in Rosario

This chart illustrates the average monthly humidity levels in Rosario, 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 Rosario 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 Rosario

In Rosario in January, 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 Rosario, you can refer to this Hourly UV Index in Rosario.

Maximum UV Index Levels in Rosario for January

The chart shows the monthly maximum UV Index (UVI) for Rosario 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 Rosario typically reaches 6, which falls under the high exposure category.

Data source: Rosario 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 Rosario Compares to Other Months

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

This table compares monthly weather conditions in Rosario, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (61°F)	27 mm (1.1 inches)	74%	high
February Weather	17°C (63°F)	23 mm (0.9 inches)	67%	very high
March Weather	20°C (68°F)	18 mm (0.7 inches)	60%	very high
April Weather	24°C (75°F)	1 mm (0.0 inches)	51%	extreme
May Weather	27°C (80°F)	1 mm (0.0 inches)	47%	extreme
June Weather	30°C (86°F)	33 mm (1.3 inches)	50%	extreme
July Weather	28°C (83°F)	135 mm (5.3 inches)	70%	extreme
August Weather	28°C (82°F)	124 mm (4.9 inches)	81%	extreme
September Weather	27°C (81°F)	92 mm (3.6 inches)	82%	extreme
October Weather	25°C (78°F)	25 mm (1.0 inches)	78%	very high
November Weather	21°C (70°F)	41 mm (1.6 inches)	78%	high
December Weather	17°C (62°F)	33 mm (1.3 inches)	80%	moderate