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January Weather in San Isidro, Argentina

Last updated: August 22, 2025

In January, the average temperature in San Isidro, Argentina hovers around 25°C (77°F). Expect a range where the minimum dips to 14°C (58°F) and the maximum can reach a sizzling 37°C (99°F). With 59 mm (2.3 in) of precipitation over 6 days, you might want to keep an umbrella handy. The average humidity rests comfortably at 50%, making for a pleasant experience overall.

January Temperature in San Isidro

In January in San Isidro, the average temperature is 25°C (77°F). Maximum temperatures can reach as high as 37°C (99°F), while minimums can drop to as low as 14°C (58°F). This pleasant range makes San Isidro a great destination for travelers looking to enjoy warm weather while still having the option for cooler evenings.

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

The chart illustrates January temperature patterns in San Isidro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Isidro, January typically has an average temperature of 25°C (77°F), with highs reaching up to 37°C (99°F) and lows dropping to around 14°C (58°F).
JanFebMarAprMayJunJulAugSepOctNovDec767471665954525459636973
Data source: Temperature data for San Isidro generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in San Isidro

In San Isidro in January, the precipitation amount is 59 mm (2.3 in) over the course of 6 days.

January Precipitation Trends in San Isidro

The chart displays monthly precipitation patterns in San Isidro, 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 Isidro, January typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec5972778280667551861037766
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in San Isidro

In San Isidro in January, humidity is 50%. With an average temperature of 25°C (77°F), this humidity feels like a warm, comfortable embrace, making it ideal for exploring the vibrant streets and enjoying outdoor activities without feeling overwhelmed by heat.

January Average Humidity in San Isidro

This chart illustrates the average monthly humidity levels in San Isidro, 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 Isidro is approximately 50%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec51%61%66%80%85%80%69%66%72%63%59%56%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in San Isidro

In San Isidro 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 San Isidro, you can check here.

Maximum UV Index Levels in San Isidro for January

The chart shows the monthly maximum UV Index (UVI) for San Isidro 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 Isidro typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141311754468101314
Data source: San Isidro 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 Isidro Compares to Other Months

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

This table compares monthly weather conditions in San Isidro, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (77°F)59 mm (2.3 inches)50%extreme
February Weather23°C (75°F)72 mm (2.9 inches)61%extreme
March Weather22°C (71°F)77 mm (3.0 inches)66%extreme
April Weather19°C (66°F)82 mm (3.2 inches)80%high
May Weather15°C (59°F)80 mm (3.2 inches)85%moderate
June Weather12°C (54°F)66 mm (2.6 inches)80%moderate
July Weather11°C (52°F)75 mm (3.0 inches)69%moderate
August Weather12°C (55°F)51 mm (2.0 inches)66%high
September Weather15°C (59°F)86 mm (3.4 inches)72%very high
October Weather17°C (63°F)103 mm (4.1 inches)63%very high
November Weather21°C (69°F)77 mm (3.0 inches)59%extreme
December Weather23°C (73°F)66 mm (2.6 inches)56%extreme

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