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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 15°C (60°F), with a comfortable range that sees minimums of 12°C (54°F) and maximums of 22°C (71°F). Expect light precipitation, averaging 5 mm (0.2 in) over just 0 days. With an average humidity of 78%, the weather is sure to be a pleasant backdrop for your adventures!

October Temperature in San Juan

In October in San Juan, the average temperature is 15°C (60°F). The maximum can reach 22°C (71°F), while the minimum can be as low as 12°C (54°F). This pleasant weather makes San Juan a comfortable destination for travelers looking to explore and enjoy outdoor activities.

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 15°C (60°F), with highs reaching up to 22°C (71°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec707170666361595858606266
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 5 mm (0.2 in) during a span of 0 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 5 mm (0.2 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec141153691166546
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 78%. With an average temperature of 15°C (60°F), this humidity feels like a warm, damp embrace that can make outdoor activities a bit uncomfortable, highlighting the importance of staying hydrated and taking breaks in the shade while exploring.

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.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%86%88%85%78%76%74%74%78%82%83%
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.
JanFebMarAprMayJunJulAugSepOctNovDec1515141310991113141515
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 Weather21°C (70°F)14 mm (0.6 inches)85%extreme
February Weather21°C (71°F)11 mm (0.4 inches)85%extreme
March Weather21°C (70°F)5 mm (0.2 inches)86%extreme
April Weather19°C (67°F)3 mm (0.1 inches)88%extreme
May Weather17°C (63°F)5 mm (0.2 inches)85%very high
June Weather16°C (61°F)9 mm (0.4 inches)78%very high
July Weather15°C (59°F)11 mm (0.4 inches)75%very high
August Weather14°C (58°F)6 mm (0.2 inches)73%extreme
September Weather15°C (58°F)6 mm (0.2 inches)74%extreme
October Weather15°C (60°F)5 mm (0.2 inches)78%extreme
November Weather17°C (63°F)4 mm (0.2 inches)82%extreme
December Weather19°C (66°F)6 mm (0.2 inches)83%extreme

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