September Weather in Casma, Peru

Last updated: August 27, 2025

In September, the average temperature in Casma, Peru hovers around 18°C (64°F). Visitors can expect a comfortable range, with minimum temperatures dipping to 14°C (58°F) and highs reaching 22°C (72°F). Moreover, the region sees a modest precipitation of 5 mm (0.2 in) over just one day, and the average humidity sits at 62%, contributing to a pleasant atmosphere.

September Temperature in Casma

In September in Casma, the average temperature is 18°C (64°F), with maximums reaching 22°C (72°F) and minimums dipping as low as 14°C (58°F). This makes it an ideal time for travelers to enjoy mild weather while exploring all that Casma has to offer.

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

The chart illustrates September temperature patterns in Casma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Casma, September typically has an average temperature of 18°C (64°F), with highs reaching up to 22°C (72°F) and lows dropping to around 14°C (58°F).

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

September Precipitation in Casma

In Casma in September, the precipitation amount is 5 mm (0.2 in) over a duration of 1 day.

September Precipitation Trends in Casma

The chart displays monthly precipitation patterns in Casma, 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 Casma, September typically receives around 5 mm (0.2 inches) of precipitation spread over approximately 1 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Casma

In Casma in September humidity is 62%. With an average temperature of 18°C (64°F), this humidity feels like a warm yet refreshing embrace, making it quite pleasant for traveling as long as you stay hydrated and take breaks in the shade.

September Average Humidity in Casma

This chart illustrates the average monthly humidity levels in Casma, 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 Casma is approximately 62%, 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 Casma

In Casma 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 Casma.

Maximum UV Index Levels in Casma for September

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

Data source: Casma 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 Casma Compares to Other Months

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

This table compares monthly weather conditions in Casma, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	21°C (70°F)	30 mm (1.2 inches)	91%	extreme
February Weather	22°C (72°F)	24 mm (1.0 inches)	89%	extreme
March Weather	22°C (72°F)	49 mm (1.9 inches)	89%	extreme
April Weather	21°C (70°F)	17 mm (0.7 inches)	88%	extreme
May Weather	20°C (68°F)	6 mm (0.2 inches)	84%	extreme
June Weather	19°C (67°F)	1 mm (0.0 inches)	73%	very high
July Weather	19°C (66°F)	0 mm (0.0 inches)	55%	very high
August Weather	18°C (65°F)	1 mm (0.0 inches)	53%	extreme
September Weather	18°C (64°F)	5 mm (0.2 inches)	62%	extreme
October Weather	18°C (65°F)	9 mm (0.3 inches)	82%	extreme
November Weather	19°C (66°F)	8 mm (0.3 inches)	89%	extreme
December Weather	20°C (68°F)	28 mm (1.1 inches)	91%	extreme