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September Weather in El Alto, Peru

Last updated: August 27, 2025

In September, the average temperature in El Alto, Peru is a pleasant 20°C (68°F), with lows reaching 17°C (63°F) and highs peaking at 24°C (75°F). Expect minimal rainfall, with only 2 mm (0.1 in) over the course of 0 days, and enjoy relatively high average humidity at 75%.

September Temperature in El Alto

In September in El Alto, the average temperature is 20°C (68°F). Maximums can reach 24°C (75°F), while minimums can dip as low as 17°C (63°F). This mild climate makes it an ideal time for travelers to explore and enjoy outdoor activities.

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

The chart illustrates September temperature patterns in El Alto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In El Alto, September typically has an average temperature of 20°C (68°F), with highs reaching up to 24°C (75°F) and lows dropping to around 17°C (63°F).
JanFebMarAprMayJunJulAugSepOctNovDec747777747270686768686971
Data source: Temperature data for El Alto 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 Alto

In El Alto in September, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

September Precipitation Trends in El Alto

The chart displays monthly precipitation patterns in El Alto, 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 Alto, September typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec16908918963124316
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in El Alto

In El Alto in September, humidity is 75%. With an average temperature of 20°C (68°F), this humidity feels like a warm, muggy embrace that can leave travelers feeling sticky and exhausted.

September Average Humidity in El Alto

This chart illustrates the average monthly humidity levels in El Alto, 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 Alto is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%87%87%86%89%84%71%71%75%77%79%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in El Alto

In El Alto 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 El Alto, you can check here.

Maximum UV Index Levels in El Alto for September

The chart shows the monthly maximum UV Index (UVI) for El Alto 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 Alto typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141516151311111214131313
Data source: El Alto 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 Alto Compares to Other Months

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

This table compares monthly weather conditions in El Alto, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (74°F)16 mm (0.6 inches)89%extreme
February Weather25°C (77°F)89 mm (3.5 inches)87%extreme
March Weather25°C (77°F)89 mm (3.5 inches)87%extreme
April Weather23°C (74°F)18 mm (0.7 inches)86%extreme
May Weather22°C (72°F)9 mm (0.4 inches)89%extreme
June Weather21°C (71°F)5 mm (0.2 inches)84%extreme
July Weather20°C (69°F)3 mm (0.1 inches)71%extreme
August Weather20°C (67°F)1 mm (0.0 inches)71%extreme
September Weather20°C (68°F)2 mm (0.1 inches)75%extreme
October Weather20°C (69°F)4 mm (0.1 inches)77%extreme
November Weather20°C (69°F)3 mm (0.1 inches)79%extreme
December Weather22°C (72°F)16 mm (0.6 inches)86%extreme

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