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October Weather in San Juan, Mexico

Last updated: August 27, 2025

In October, the average temperature in San Juan, Mexico hovers around 24°C (75°F), creating a pleasant atmosphere. However, temperatures can dip as low as 14°C (58°F) and rise up to 32°C (90°F). Be prepared for significant rainfall, as 231 mm (9.1 in) of precipitation is expected over 23 days, contributing to an average humidity of 80%. Enjoy the unique climate of San Juan during this vibrant month!

October Temperature in San Juan

In October in San Juan, the average temperature is 24°C (75°F). The maximum can reach 32°C (90°F), and the minimum can be as low as 14°C (58°F). This delightful climate makes San Juan an ideal destination for travelers seeking warm weather and outdoor adventures.

October Weather in San Juan: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in San Juan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Juan, October typically has an average temperature of 24°C (75°F), with highs reaching up to 32°C (90°F) and lows dropping to around 14°C (58°F).
JanFebMarAprMayJunJulAugSepOctNovDec717378808177777675757270
Data source: Temperature data for San Juan 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.

October Precipitation in San Juan

In San Juan in October, the total precipitation amount reaches 231 mm (9.1 in) over the course of 23 days.

October Precipitation Trends in San Juan

The chart displays monthly precipitation patterns in San Juan, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In San Juan, October typically receives around 231 mm (9.1 inches) of precipitation spread over approximately 23 days.
JanFebMarAprMayJunJulAugSepOctNovDec232060318344445396231432
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in San Juan

In San Juan in October humidity is 80%. With an average temperature of 24°C (75°F), this humidity feels like a warm, sticky blanket enveloping you, making travel slightly uncomfortable as sweat clings to your skin and the air feels thick, urging you to seek shade and hydration frequently.

October Average Humidity in San Juan

This chart illustrates the average monthly humidity levels in San Juan, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in San Juan is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec70%65%59%60%67%80%81%83%83%80%77%76%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in San Juan

In San Juan in October, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in San Juan.

Maximum UV Index Levels in San Juan for October

The chart shows the monthly maximum UV Index (UVI) for San Juan in October, 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 October, the maximum UV index in San Juan typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131313141313131198
Data source: San Juan October 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 October Weather in San Juan Compares to Other Months

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

This table compares monthly weather conditions in San Juan, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather22°C (71°F)2 mm (0.1 inches)70%very high
February Weather23°C (74°F)3 mm (0.1 inches)65%extreme
March Weather25°C (78°F)2 mm (0.1 inches)59%extreme
April Weather27°C (80°F)0 mm (0.0 inches)60%extreme
May Weather27°C (81°F)60 mm (2.4 inches)67%extreme
June Weather25°C (78°F)318 mm (12.5 inches)80%extreme
July Weather25°C (77°F)344 mm (13.5 inches)81%extreme
August Weather24°C (76°F)445 mm (17.5 inches)83%extreme
September Weather24°C (75°F)396 mm (15.6 inches)83%extreme
October Weather24°C (75°F)231 mm (9.1 inches)80%extreme
November Weather22°C (73°F)43 mm (1.7 inches)77%very high
December Weather21°C (70°F)2 mm (0.1 inches)76%very high

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