September Weather in Alerta, Peru

Last updated: August 27, 2025

In Alerta, Peru, the average temperature in September hovers around 27°C (81°F), with a minimum of 15°C (60°F) and a maximum reaching up to 38°C (100°F). Expect about 83 mm (3.3 in) of precipitation spread over 11 days, contributing to an average humidity of just 33%.

September Temperature in Alerta

In September in Alerta, the average temperature is 27°C (81°F). Maximums can reach 38°C (100°F) and minimums can be as low as 15°C (60°F). It's a great time to visit for warm weather lovers, but be prepared for both heat and cooler evenings.

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

The chart illustrates September temperature patterns in Alerta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alerta, September typically has an average temperature of 27°C (81°F), with highs reaching up to 38°C (100°F) and lows dropping to around 15°C (60°F).

Data source: Temperature data for Alerta generated using information from the Copernicus Climate Change Service.

September Precipitation in Alerta

In Alerta in September, the precipitation amount is 83 mm (3.3 in) over the course of 11 days.

September Precipitation Trends in Alerta

The chart displays monthly precipitation patterns in Alerta, 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 Alerta, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 11 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Alerta

In Alerta in September humidity is 33%. With an average temperature of 27°C (81°F), this humidity feels like a comfortable breeze on a warm day, making it quite pleasant for traveling and exploring the surroundings.

September Average Humidity in Alerta

This chart illustrates the average monthly humidity levels in Alerta, 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 Alerta is approximately 33%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Alerta

In Alerta in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Alerta.

Maximum UV Index Levels in Alerta for September

The chart shows the monthly maximum UV Index (UVI) for Alerta 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 Alerta typically reaches 13, which falls under the extreme exposure category.

Data source: Alerta 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 Alerta Compares to Other Months

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

This table compares monthly weather conditions in Alerta, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (79°F)	264 mm (10.4 inches)	88%	extreme
February Weather	25°C (78°F)	292 mm (11.5 inches)	87%	extreme
March Weather	25°C (78°F)	261 mm (10.3 inches)	87%	extreme
April Weather	25°C (78°F)	185 mm (7.3 inches)	89%	extreme
May Weather	24°C (76°F)	99 mm (3.9 inches)	84%	extreme
June Weather	23°C (75°F)	41 mm (1.6 inches)	67%	very high
July Weather	24°C (75°F)	29 mm (1.1 inches)	46%	very high
August Weather	25°C (78°F)	26 mm (1.0 inches)	37%	extreme
September Weather	27°C (81°F)	83 mm (3.3 inches)	33%	extreme
October Weather	27°C (80°F)	178 mm (7.0 inches)	44%	extreme
November Weather	26°C (79°F)	238 mm (9.4 inches)	73%	extreme
December Weather	26°C (79°F)	303 mm (11.9 inches)	88%	extreme