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May Weather in San Jose, Argentina

Last updated: August 22, 2025

The average temperature in San Jose, Argentina during May hovers around 18°C (64°F), with extremes ranging from a chilly 5°C (42°F) to a warm 32°C (90°F). Be prepared for some wet days, as 197 mm (7.8 in) of precipitation usually falls over the course of 12 days. With an average humidity of 82%, expect that every breath feels a bit thicker.

May Temperature in San Jose

In May in San Jose, the average temperature is 18°C (64°F). Maximum temperatures can reach 32°C (90°F), while minimums can drop as low as 5°C (42°F). This makes San Jose a great destination for travelers seeking a mix of warm days and cooler evenings.

May Weather in San Jose: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in San Jose, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Jose, May typically has an average temperature of 18°C (64°F), with highs reaching up to 32°C (90°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec807875716462606368727578
Data source: Temperature data for San Jose 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.

May Precipitation in San Jose

In San Jose in May, the total precipitation amount reaches 197 mm (7.8 in) over the course of 12 days.

May Precipitation Trends in San Jose

The chart displays monthly precipitation patterns in San Jose, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In San Jose, May typically receives around 197 mm (7.8 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec16810613512319799968110315214394
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in San Jose

In San Jose in May humidity is 82%. With an average temperature of 18°C (64°F), this humidity feels like a warm, muggy embrace that can make exploring the area feel stifling, leaving travelers drenched in sweat and longing for respite in the shade.

May Average Humidity in San Jose

This chart illustrates the average monthly humidity levels in San Jose, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in San Jose is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%71%74%82%82%73%67%49%54%58%69%84%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in San Jose

In San Jose in May, 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 San Jose, you can refer to this Hourly UV Index in San Jose.

Maximum UV Index Levels in San Jose for May

The chart shows the monthly maximum UV Index (UVI) for San Jose in May, 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 May, the maximum UV index in San Jose typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15141210656710131414
Data source: San Jose May 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 May Weather in San Jose Compares to Other Months

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

This table compares monthly weather conditions in San Jose, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (80°F)168 mm (6.6 inches)77%extreme
February Weather26°C (78°F)106 mm (4.2 inches)71%extreme
March Weather24°C (76°F)135 mm (5.3 inches)74%extreme
April Weather21°C (71°F)123 mm (4.8 inches)82%very high
May Weather18°C (64°F)197 mm (7.8 inches)82%high
June Weather16°C (62°F)99 mm (3.9 inches)73%moderate
July Weather16°C (60°F)96 mm (3.8 inches)67%high
August Weather17°C (63°F)80 mm (3.2 inches)49%high
September Weather20°C (68°F)103 mm (4.1 inches)54%very high
October Weather22°C (72°F)152 mm (6.0 inches)58%extreme
November Weather24°C (75°F)143 mm (5.6 inches)69%extreme
December Weather26°C (79°F)93 mm (3.7 inches)84%extreme

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