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September Weather in Mallay, Peru

Last updated: August 27, 2025

In September, the average temperature in Mallay, Peru hovers around 4°C (40°F). Temperatures can dip to a chilly -5°C (24°F) at night, while daytime highs reach a mild 14°C (58°F). Expect approximately 103 mm (4.1 in) of precipitation spread over 22 days, with an average humidity level of 40%. Stay prepared for a mix of brisk and wet weather!

September Temperature in Mallay

In September in Mallay, the average temperature is 4°C (40°F), with maximums reaching up to 14°C (58°F) and minimums dropping as low as -5°C (24°F). It's advisable to pack warm clothing and be prepared for chilly weather during your travels.

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

The chart illustrates September temperature patterns in Mallay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mallay, September typically has an average temperature of 4°C (40°F), with highs reaching up to 14°C (58°F) and lows dropping to around -5°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec414241414039393940414142
Data source: Temperature data for Mallay 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 Mallay

In Mallay in September, the precipitation amount is 103 mm (4.1 in) spread over 22 days.

September Precipitation Trends in Mallay

The chart displays monthly precipitation patterns in Mallay, 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 Mallay, September typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec218254310171104373044103173205252
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mallay

In Mallay in September humidity is 40%. With an average temperature of 4°C (40°F), this humidity feels like a brisk, invigorating chill in the air, making travel invigorating yet slightly uncomfortable; you'll want to dress warmly while enjoying the fresh atmosphere.

September Average Humidity in Mallay

This chart illustrates the average monthly humidity levels in Mallay, 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 Mallay 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 Mallay

In Mallay in September, the maximum UV index is 18, which corresponds to an extreme exposure category. This means that the time to burn is just 10 minutes. For more detailed information, you can check the hourly UV index in Mallay.

Maximum UV Index Levels in Mallay for September

The chart shows the monthly maximum UV Index (UVI) for Mallay 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 Mallay typically reaches 18, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec202021181513141518191918
Data source: Mallay 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 Mallay Compares to Other Months

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

This table compares monthly weather conditions in Mallay, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)218 mm (8.6 inches)91%extreme
February Weather5°C (42°F)254 mm (10.0 inches)90%extreme
March Weather5°C (41°F)310 mm (12.2 inches)91%extreme
April Weather5°C (41°F)171 mm (6.7 inches)89%extreme
May Weather5°C (41°F)104 mm (4.1 inches)85%extreme
June Weather4°C (40°F)37 mm (1.4 inches)65%extreme
July Weather4°C (39°F)30 mm (1.2 inches)47%extreme
August Weather4°C (40°F)44 mm (1.7 inches)38%extreme
September Weather4°C (40°F)103 mm (4.1 inches)40%extreme
October Weather5°C (41°F)173 mm (6.8 inches)56%extreme
November Weather5°C (42°F)205 mm (8.1 inches)76%extreme
December Weather5°C (42°F)252 mm (9.9 inches)90%extreme

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