nomadseason

October Weather in San Juan, Mexico

Last updated: August 27, 2025

In San Juan, Mexico during October, the average temperature is a pleasant 23°C (74°F). You can expect a minimum of 12°C (53°F) and a maximum of 33°C (91°F). With an average precipitation of 68 mm (2.7 in) spread over 7 days, the humidity sits at a comfortable 78%. Enjoy the mild climate that San Juan has to offer!

October Temperature in San Juan

In October in San Juan, the average temperature is 23°C (74°F), with maximums potentially reaching 33°C (91°F) and minimums dropping to as low as 12°C (53°F). This pleasant climate makes it an ideal time for exploring and enjoying outdoor activities in San Juan.

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 23°C (74°F), with highs reaching up to 33°C (91°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec636468727678767675746964
Data source: Temperature data for San Juan generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 precipitation amount is 68 mm (2.7 in) over the course of 7 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 68 mm (2.7 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec113721273217255166681324
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

October Humidity in San Juan

In San Juan in October humidity is 78%. With an average temperature of 23°C (74°F), this humidity feels like a warm, enveloping embrace, making travel somewhat stifling and prompting frequent breaks to hydrate and seek shade.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%66%61%56%61%73%82%83%83%79%77%78%
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.
JanFebMarAprMayJunJulAugSepOctNovDec710111313121212121186
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 Weather17°C (63°F)11 mm (0.4 inches)74%high
February Weather18°C (65°F)37 mm (1.5 inches)66%very high
March Weather20°C (68°F)2 mm (0.1 inches)61%extreme
April Weather22°C (72°F)1 mm (0.0 inches)56%extreme
May Weather24°C (76°F)2 mm (0.1 inches)61%extreme
June Weather26°C (78°F)73 mm (2.9 inches)73%extreme
July Weather24°C (76°F)217 mm (8.6 inches)82%extreme
August Weather25°C (76°F)255 mm (10.0 inches)83%extreme
September Weather24°C (75°F)166 mm (6.5 inches)83%extreme
October Weather23°C (74°F)68 mm (2.7 inches)78%extreme
November Weather21°C (69°F)13 mm (0.5 inches)77%very high
December Weather18°C (64°F)24 mm (0.9 inches)78%high

Compare San Juan's Climate with Cities Worldwide