January Weather in San Justo, Argentina

Last updated: August 22, 2025

In January, the average temperature in San Justo, Argentina hovers around 25°C (78°F), making it a pleasant time to visit. However, be prepared for a range; temperatures can drop to a chilly 13°C (55°F) or soar up to a scorching 42°C (107°F). The precipitation for the month typically reaches 125 mm (4.9 in), with rain falling on about 8 days, while the average humidity settles at around 54%. Enjoy the variability of the weather as you explore this vibrant destination!

January Temperature in San Justo

In January in San Justo, the average temperature is 25°C (78°F). Maximums can reach 42°C (107°F), and minimums can be as low as 13°C (55°F). Be prepared for warm weather during the day, but pack a light jacket for cooler evenings.

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

The chart illustrates January temperature patterns in San Justo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Justo, January typically has an average temperature of 25°C (78°F), with highs reaching up to 42°C (107°F) and lows dropping to around 13°C (55°F).

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

January Precipitation in San Justo

In San Justo in January, the precipitation amount is 125 mm (4.9 in) over the course of 8 days.

January Precipitation Trends in San Justo

The chart displays monthly precipitation patterns in San Justo, 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 Justo, January typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 8 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 San Justo

In San Justo in January humidity is 54%. With an average temperature of 25°C (78°F), this humidity feels like a warm, balmy embrace, making it ideal for leisurely strolls and outdoor adventures, but travelers may want to stay hydrated and take breaks in the shade to fully enjoy the experience.

January Average Humidity in San Justo

This chart illustrates the average monthly humidity levels in San Justo, 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 Justo is approximately 54%, 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 Justo

In San Justo in January, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in San Justo.

Maximum UV Index Levels in San Justo for January

The chart shows the monthly maximum UV Index (UVI) for San Justo 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 Justo typically reaches 15, which falls under the extreme exposure category.

Data source: San Justo 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 Justo Compares to Other Months

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

This table compares monthly weather conditions in San Justo, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	25°C (78°F)	125 mm (4.9 inches)	54%	extreme
February Weather	24°C (75°F)	103 mm (4.1 inches)	61%	extreme
March Weather	22°C (71°F)	95 mm (3.7 inches)	69%	extreme
April Weather	19°C (67°F)	94 mm (3.7 inches)	79%	very high
May Weather	15°C (59°F)	97 mm (3.8 inches)	85%	moderate
June Weather	12°C (55°F)	72 mm (2.9 inches)	82%	moderate
July Weather	11°C (53°F)	59 mm (2.3 inches)	69%	moderate
August Weather	13°C (56°F)	81 mm (3.2 inches)	65%	high
September Weather	16°C (61°F)	90 mm (3.5 inches)	70%	very high
October Weather	18°C (65°F)	112 mm (4.4 inches)	63%	extreme
November Weather	22°C (72°F)	71 mm (2.8 inches)	60%	extreme
December Weather	24°C (75°F)	128 mm (5.0 inches)	63%	extreme