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September Weather in Alca, Peru

Last updated: August 27, 2025

In Alca, Peru, the average temperature in September hovers around 4°C (39°F). Expect chilly days with a minimum dropping to -9°C (17°F) and a maximum reaching up to 16°C (60°F). You'll experience a fair bit of rain, with 47 mm (1.9 in) of precipitation spread over 13 days. Humidity levels are moderate, averaging around 53%.

September Temperature in Alca

In September, in Alca, the average temperature is 4°C (39°F), with maximums reaching 16°C (60°F) and minimums dropping as low as -9°C (17°F). This weather can be quite chilly, so travelers should pack warm clothing to stay comfortable during their visit.

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

The chart illustrates September temperature patterns in Alca, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alca, September typically has an average temperature of 4°C (39°F), with highs reaching up to 16°C (60°F) and lows dropping to around -9°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec404040393636363739404241
Data source: Temperature data for Alca 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 Alca

In Alca in September, the total precipitation amount is 47 mm (1.9 in), spread over 13 days.

September Precipitation Trends in Alca

The chart displays monthly precipitation patterns in Alca, 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 Alca, September typically receives around 47 mm (1.9 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec22524025311346131213477681136
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Alca

In Alca in September humidity is 53%. With an average temperature of 4°C (39°F), this humidity feels like a crisp chill in the air, making travel invigorating but requiring layers to stay comfortable.

September Average Humidity in Alca

This chart illustrates the average monthly humidity levels in Alca, 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 Alca is approximately 53%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%90%90%90%84%67%53%47%53%67%75%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Alca

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

Maximum UV Index Levels in Alca for September

The chart shows the monthly maximum UV Index (UVI) for Alca 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 Alca typically reaches 17, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec222120181411131517192020
Data source: Alca 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 Alca Compares to Other Months

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

This table compares monthly weather conditions in Alca, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)225 mm (8.9 inches)89%extreme
February Weather4°C (40°F)240 mm (9.4 inches)90%extreme
March Weather4°C (40°F)253 mm (10.0 inches)90%extreme
April Weather4°C (39°F)113 mm (4.4 inches)90%extreme
May Weather2°C (37°F)46 mm (1.8 inches)84%extreme
June Weather2°C (36°F)13 mm (0.5 inches)67%extreme
July Weather2°C (36°F)12 mm (0.5 inches)53%extreme
August Weather3°C (37°F)13 mm (0.5 inches)47%extreme
September Weather4°C (39°F)47 mm (1.9 inches)53%extreme
October Weather4°C (40°F)76 mm (3.0 inches)67%extreme
November Weather5°C (42°F)81 mm (3.2 inches)75%extreme
December Weather5°C (42°F)136 mm (5.4 inches)82%extreme

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