September Weather in Arin, Peru

Last updated: August 27, 2025

In September, the average temperature in Arin, Peru hovers around 7°C (45°F). Expect to experience a minimum of -2°C (29°F), with highs reaching up to 17°C (63°F). Rain may accompany this month, bringing about 74 mm (2.9 in) of precipitation over 21 days. On the brighter side, the average humidity is a comfortable 51%.

September Temperature in Arin

In September in Arin, the average temperature is 7°C (45°F), with maximums reaching 17°C (63°F) and minimums dropping as low as -2°C (29°F). Be prepared for a mix of cool and mild weather, making it a great time for exploration with the right layering of clothing.

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

The chart illustrates September temperature patterns in Arin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arin, September typically has an average temperature of 7°C (45°F), with highs reaching up to 17°C (63°F) and lows dropping to around -2°C (29°F).

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

September Precipitation in Arin

In Arin in September, the precipitation amount is 74 mm (2.9 in) spread over 21 days.

September Precipitation Trends in Arin

The chart displays monthly precipitation patterns in Arin, 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 Arin, September typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 21 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 Arin

In Arin in September humidity is 51%. With an average temperature of 7°C (45°F), this humidity feels like a brisk and invigorating chill for traveling, making it essential to dress in layers to stay comfortable while exploring the sights.

September Average Humidity in Arin

This chart illustrates the average monthly humidity levels in Arin, 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 Arin is approximately 51%, 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 Arin

In Arin in September, the maximum UV index is 16, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, making it crucial to take protective measures. For detailed information, you can refer to the Hourly UV Index in Arin.

Maximum UV Index Levels in Arin for September

The chart shows the monthly maximum UV Index (UVI) for Arin 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 Arin typically reaches 16, which falls under the extreme exposure category.

Data source: Arin 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 Arin Compares to Other Months

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

This table compares monthly weather conditions in Arin, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (46°F)	206 mm (8.1 inches)	94%	extreme
February Weather	8°C (46°F)	265 mm (10.5 inches)	92%	extreme
March Weather	8°C (46°F)	218 mm (8.6 inches)	92%	extreme
April Weather	8°C (46°F)	128 mm (5.0 inches)	90%	extreme
May Weather	7°C (45°F)	56 mm (2.2 inches)	88%	extreme
June Weather	7°C (44°F)	31 mm (1.2 inches)	77%	extreme
July Weather	6°C (44°F)	30 mm (1.2 inches)	55%	extreme
August Weather	7°C (44°F)	46 mm (1.8 inches)	44%	extreme
September Weather	7°C (45°F)	74 mm (2.9 inches)	51%	extreme
October Weather	8°C (46°F)	147 mm (5.8 inches)	64%	extreme
November Weather	9°C (48°F)	181 mm (7.1 inches)	84%	extreme
December Weather	8°C (47°F)	256 mm (10.1 inches)	93%	extreme