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September Weather in El Rosario, Peru

Last updated: August 27, 2025

In El Rosario, Peru, the average temperature in September hovers around 5°C (41°F). Temperatures can dip to a chilling -3°C (27°F) and rise to a comfortable 13°C (55°F). Expect 80 mm (3.1 in) of precipitation spread over approximately 20 days, alongside an average humidity of 40%. Stay prepared for a month of varied weather!

September Temperature in El Rosario

In September in El Rosario, the average temperature is 5°C (41°F), with maximums reaching 13°C (55°F) and minimums dropping as low as -3°C (27°F). Be sure to prepare for a range of temperatures when planning your trip!

September Weather in El Rosario: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in El Rosario, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In El Rosario, September typically has an average temperature of 5°C (41°F), with highs reaching up to 13°C (55°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec434343424139383940424444
Data source: Temperature data for El Rosario 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 El Rosario

In El Rosario in September, the precipitation amount is 80 mm (3.1 in) over a span of 20 days.

September Precipitation Trends in El Rosario

The chart displays monthly precipitation patterns in El Rosario, 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 El Rosario, September typically receives around 80 mm (3.1 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec1842232421108337264280121149192
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in El Rosario

In El Rosario in September, humidity is 40%. With average temperature 5°C (41°F), this humidity feels like a chilly, crisp morning, making it ideal for brisk walks and exploring the area comfortably without the heaviness of oppressive moisture.

September Average Humidity in El Rosario

This chart illustrates the average monthly humidity levels in El Rosario, 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 El Rosario is approximately 40%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%90%91%89%85%65%47%38%40%56%76%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in El Rosario

In El Rosario in September, the maximum UV index reaches an alarming 17, which falls under the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to stay protected. For more details on the hourly UV index in El Rosario, you can check Hourly UV Index in El Rosario.

Maximum UV Index Levels in El Rosario for September

The chart shows the monthly maximum UV Index (UVI) for El Rosario 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 El Rosario typically reaches 17, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec191919181512131517181818
Data source: El Rosario 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 El Rosario Compares to Other Months

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

This table compares monthly weather conditions in El Rosario, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)184 mm (7.2 inches)91%extreme
February Weather6°C (43°F)223 mm (8.8 inches)90%extreme
March Weather6°C (43°F)242 mm (9.5 inches)91%extreme
April Weather6°C (42°F)110 mm (4.3 inches)89%extreme
May Weather5°C (41°F)83 mm (3.3 inches)85%extreme
June Weather4°C (40°F)37 mm (1.4 inches)65%extreme
July Weather4°C (39°F)25 mm (1.0 inches)47%extreme
August Weather4°C (39°F)42 mm (1.7 inches)38%extreme
September Weather5°C (41°F)80 mm (3.1 inches)40%extreme
October Weather5°C (42°F)121 mm (4.7 inches)56%extreme
November Weather6°C (44°F)149 mm (5.8 inches)76%extreme
December Weather6°C (44°F)192 mm (7.5 inches)90%extreme

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