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September Weather in Aco, Peru

Last updated: August 27, 2025

In September, the average temperature in Aco, Peru hovers around 6°C (43°F), with extremes ranging from a brisk -3°C (26°F) to a mild 15°C (60°F). Expect 100 mm (3.9 in) of precipitation over 24 days, contributing to an average humidity level of 53%. Prepare for a mix of chilly and damp days!

September Temperature in Aco

In September in Aco, the average temperature is 6°C (43°F). Maximums can reach 15°C (60°F), and minimums can drop as low as -3°C (26°F). It's advisable to pack layers to stay comfortable while exploring the beautiful surroundings.

September Weather in Aco: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Aco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Aco, September typically has an average temperature of 6°C (43°F), with highs reaching up to 15°C (60°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec454545444343424243444646
Data source: Temperature data for Aco 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 Aco

In Aco in September, the precipitation amount is 100 mm (3.9 in) over the course of 24 days.

September Precipitation Trends in Aco

The chart displays monthly precipitation patterns in Aco, 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 Aco, September typically receives around 100 mm (3.9 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec23728127413182302848100148185218
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Aco

In Aco in September, humidity is 53%. With an average temperature of 6°C (43°F), this humidity feels like a crisp, invigorating chill that can make exploring outdoors refreshing yet slightly uncomfortable, requiring warm layers and occasional breaks to warm up.

September Average Humidity in Aco

This chart illustrates the average monthly humidity levels in Aco, 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 Aco is approximately 53%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%89%90%89%83%69%56%51%53%68%82%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Aco

In Aco 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 Aco, you can check Hourly UV Index in Aco.

Maximum UV Index Levels in Aco for September

The chart shows the monthly maximum UV Index (UVI) for Aco 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 Aco typically reaches 17, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec201919171512131517181818
Data source: Aco 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 Aco Compares to Other Months

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

This table compares monthly weather conditions in Aco, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)237 mm (9.3 inches)89%extreme
February Weather7°C (45°F)281 mm (11.1 inches)89%extreme
March Weather7°C (45°F)274 mm (10.8 inches)90%extreme
April Weather7°C (45°F)131 mm (5.2 inches)89%extreme
May Weather6°C (44°F)82 mm (3.2 inches)83%extreme
June Weather6°C (43°F)30 mm (1.2 inches)69%extreme
July Weather5°C (42°F)28 mm (1.1 inches)56%extreme
August Weather6°C (43°F)48 mm (1.9 inches)50%extreme
September Weather6°C (43°F)100 mm (3.9 inches)53%extreme
October Weather7°C (44°F)148 mm (5.8 inches)68%extreme
November Weather8°C (46°F)185 mm (7.3 inches)81%extreme
December Weather8°C (46°F)218 mm (8.6 inches)87%extreme

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