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August Weather in San Jose, Mexico

Last updated: August 27, 2025

In August, the average temperature in San Jose, Mexico hovers around 29°C (84°F). Expect a comfortable minimum of 23°C (74°F), while the mercury can soar to a sweltering 38°C (100°F). Be prepared for 149 mm (5.9 in) of precipitation over 21 days and a high average humidity of 76%.

August Temperature in San Jose

In August in San Jose, the average temperature is 29°C (84°F), with maximums reaching 38°C (100°F) and minimums dropping to 23°C (74°F). This warm climate makes it an ideal time for travelers seeking sun-soaked adventures and outdoor activities.

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

The chart illustrates August 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, August typically has an average temperature of 29°C (84°F), with highs reaching up to 38°C (100°F) and lows dropping to around 23°C (74°F).
JanFebMarAprMayJunJulAugSepOctNovDec757881858884858483817775
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.

August Precipitation in San Jose

In San Jose in August, the total precipitation amount is 149 mm (5.9 in) spread over 21 days.

August Precipitation Trends in San Jose

The chart displays monthly precipitation patterns in San Jose, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In San Jose, August typically receives around 149 mm (5.9 inches) of precipitation spread over approximately 21 days.
JanFebMarAprMayJunJulAugSepOctNovDec42211732742499014921925111849
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in San Jose

In San Jose in August, humidity is 76%. With an average temperature of 29°C (84°F), this humidity feels like a warm embrace that clings to your skin, making outdoor activities a challenge and encouraging travelers to seek shade or cool refreshments frequently.

August Average Humidity in San Jose

This chart illustrates the average monthly humidity levels in San Jose, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in San Jose is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%73%64%61%60%59%64%76%80%82%83%84%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in San Jose

In San Jose in August, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in San Jose.

Maximum UV Index Levels in San Jose for August

The chart shows the monthly maximum UV Index (UVI) for San Jose in August, 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 August, the maximum UV index in San Jose typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131313141313121198
Data source: San Jose August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (75°F)42 mm (1.6 inches)78%very high
February Weather26°C (78°F)21 mm (0.8 inches)73%extreme
March Weather27°C (82°F)17 mm (0.7 inches)64%extreme
April Weather29°C (85°F)32 mm (1.3 inches)61%extreme
May Weather31°C (88°F)74 mm (2.9 inches)59%extreme
June Weather29°C (84°F)249 mm (9.8 inches)59%extreme
July Weather29°C (85°F)90 mm (3.5 inches)64%extreme
August Weather29°C (84°F)149 mm (5.9 inches)76%extreme
September Weather28°C (83°F)219 mm (8.6 inches)80%extreme
October Weather27°C (81°F)251 mm (9.9 inches)82%extreme
November Weather25°C (78°F)118 mm (4.7 inches)83%very high
December Weather24°C (76°F)49 mm (1.9 inches)84%very high

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