January Weather in Rosario, Uruguay

Last updated: August 28, 2025

In Rosario, Uruguay, the average temperature in January hovers around 24°C (76°F). However, temperatures can vary significantly, with a minimum of 12°C (54°F) and soaring up to a maximum of 41°C (107°F). Expect 85 mm (3.4 in) of rainfall over roughly 6 days, accompanied by an average humidity of 63%—perfect for those who enjoy a warm, tropical climate!

January Temperature in Rosario

In January in Rosario, the average temperature is 24°C (76°F). The maximum can reach 41°C (107°F), while the minimum can dip to as low as 12°C (54°F). It's a great time to travel to Rosario if you enjoy warm weather and diverse temperature variations.

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 24°C (76°F), with highs reaching up to 41°C (107°F) and lows dropping to around 12°C (54°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 total precipitation amount is 85 mm (3.4 in) over the course of 6 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 85 mm (3.4 inches) of precipitation spread over approximately 6 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 Rosario

In Rosario in January humidity is 63%. With an average temperature of 24°C (76°F), this humidity feels like a warm embrace, making it perfect for exploring outdoor attractions while ensuring that travelers stay refreshed with plenty of water breaks.

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 63%, 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 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Rosario, you can check here.

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 14, which falls under the extreme 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	24°C (76°F)	85 mm (3.4 inches)	63%	extreme
February Weather	23°C (73°F)	110 mm (4.3 inches)	69%	extreme
March Weather	21°C (70°F)	95 mm (3.7 inches)	73%	extreme
April Weather	18°C (65°F)	70 mm (2.8 inches)	79%	high
May Weather	14°C (58°F)	89 mm (3.5 inches)	82%	moderate
June Weather	12°C (54°F)	75 mm (3.0 inches)	80%	moderate
July Weather	11°C (52°F)	86 mm (3.4 inches)	72%	moderate
August Weather	12°C (54°F)	75 mm (3.0 inches)	72%	high
September Weather	14°C (58°F)	76 mm (3.0 inches)	76%	very high
October Weather	17°C (62°F)	91 mm (3.6 inches)	71%	very high
November Weather	20°C (69°F)	67 mm (2.6 inches)	68%	extreme
December Weather	23°C (73°F)	72 mm (2.8 inches)	65%	extreme