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October Weather in San Juan, Peru

Last updated: August 27, 2025

In October, the average temperature in San Juan, Peru is a warm 26°C (80°F), with a minimum of 21°C (71°F) and a maximum soaring up to 36°C (96°F). Expect about 188 mm (7.4 in) of precipitation spread across 22 days, contributing to an average humidity level of 62%. Stay prepared for both the heat and occasional rain!

October Temperature in San Juan

In October in San Juan, the average temperature is 26°C (80°F), with maximums reaching up to 36°C (96°F) and minimums dipping as low as 21°C (71°F). This pleasant climate makes it an ideal time for travelers to explore the area while enjoying comfortable weather.

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 26°C (80°F), with highs reaching up to 36°C (96°F) and lows dropping to around 21°C (71°F).
JanFebMarAprMayJunJulAugSepOctNovDec797979797878777879797979
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 precipitation amount is 188 mm (7.4 in) over the course of 22 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 188 mm (7.4 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec251226321305223193145107152188233273
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 62%. With an average temperature of 26°C (80°F), this humidity feels like a warm, enveloping blanket that can make outdoor exploration feel muggy, necessitating frequent hydration breaks and shaded spots to rest, especially during midday adventures.

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 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%87%89%82%69%58%56%62%77%88%
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 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 Juan, you can check here.

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 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151617161312111213141313
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 Weather26°C (79°F)251 mm (9.9 inches)84%extreme
February Weather26°C (79°F)226 mm (8.9 inches)82%extreme
March Weather26°C (79°F)321 mm (12.7 inches)84%extreme
April Weather26°C (79°F)305 mm (12.0 inches)87%extreme
May Weather26°C (79°F)223 mm (8.8 inches)89%extreme
June Weather25°C (78°F)193 mm (7.6 inches)82%extreme
July Weather25°C (78°F)145 mm (5.7 inches)69%extreme
August Weather26°C (79°F)107 mm (4.2 inches)58%extreme
September Weather26°C (80°F)152 mm (6.0 inches)56%extreme
October Weather26°C (80°F)188 mm (7.4 inches)62%extreme
November Weather26°C (80°F)233 mm (9.2 inches)77%extreme
December Weather26°C (79°F)273 mm (10.7 inches)88%extreme

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