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September Weather in San Juan Bautista, Peru

Last updated: August 27, 2025

In September, the average temperature in San Juan Bautista, Peru is a delightful 19°C (67°F). You'll experience mild conditions, with temperatures ranging from a minimum of 13°C (56°F) to a comfortable maximum of 27°C (81°F). The weather is particularly dry, boasting 0 mm (0.0 in) of precipitation over 0 days, and an average humidity of 74%, ensuring a pleasant atmosphere for your visit!

September Temperature in San Juan Bautista

In September in San Juan Bautista, the average temperature is 19°C (67°F), with maximums reaching 27°C (81°F) and minimums dropping as low as 13°C (56°F). This pleasant climate makes it an ideal time for travelers looking to enjoy mild weather and outdoor activities.

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

The chart illustrates September temperature patterns in San Juan Bautista, 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 Bautista, September typically has an average temperature of 19°C (67°F), with highs reaching up to 27°C (81°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec737374726966656667686971
Data source: Temperature data for San Juan Bautista 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.

September Precipitation in San Juan Bautista

In San Juan Bautista in September, the precipitation amount is 0 mm (0.0 in) during 0 days.

September Precipitation Trends in San Juan Bautista

The chart displays monthly precipitation patterns in San Juan Bautista, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In San Juan Bautista, September typically receives around 0 mm (0.0 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec535029610000217
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Juan Bautista

In San Juan Bautista in September, humidity is 74%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel stifling, often leading travelers to seek shade and hydrate frequently.

September Average Humidity in San Juan Bautista

This chart illustrates the average monthly humidity levels in San Juan Bautista, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in San Juan Bautista is approximately 74%, 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 September generated using information from the Copernicus Climate Change Service.

September UV Index in San Juan Bautista

In San Juan Bautista in September, 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 Bautista, you can check here.

Maximum UV Index Levels in San Juan Bautista for September

The chart shows the monthly maximum UV Index (UVI) for San Juan Bautista in September, 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 September, the maximum UV index in San Juan Bautista typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec161616141210111214161716
Data source: San Juan Bautista September 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 September Weather in San Juan Bautista Compares to Other Months

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

This table compares monthly weather conditions in San Juan Bautista, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (73°F)53 mm (2.1 inches)85%extreme
February Weather23°C (74°F)50 mm (2.0 inches)85%extreme
March Weather23°C (74°F)29 mm (1.1 inches)86%extreme
April Weather22°C (72°F)6 mm (0.2 inches)88%extreme
May Weather21°C (69°F)1 mm (0.0 inches)85%extreme
June Weather19°C (67°F)0 mm (0.0 inches)78%very high
July Weather18°C (66°F)0 mm (0.0 inches)75%extreme
August Weather19°C (66°F)0 mm (0.0 inches)73%extreme
September Weather19°C (67°F)0 mm (0.0 inches)74%extreme
October Weather20°C (68°F)2 mm (0.1 inches)78%extreme
November Weather21°C (69°F)1 mm (0.1 inches)82%extreme
December Weather22°C (71°F)7 mm (0.3 inches)83%extreme

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