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September Weather in Santa Rosa, Peru

Last updated: August 27, 2025

In Santa Rosa, Peru, the average temperature in September hovers around 6°C (43°F). You might experience a chilly minimum of -6°C (21°F), while the mercury can rise to a comfortable 16°C (61°F). Expect 83 mm (3.3 in) of precipitation spread over 22 days, coupled with an average humidity of 53%. So, be prepared for a mix of cool and wet conditions!

September Temperature in Santa Rosa

In September, in Santa Rosa, the average temperature is 6°C (43°F). The maximum can reach 16°C (61°F), while the minimum can drop as low as -6°C (21°F). Therefore, travelers should prepare for a mix of chilly and mildly warm weather during their visit.

September Weather in Santa Rosa: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Santa Rosa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santa Rosa, September typically has an average temperature of 6°C (43°F), with highs reaching up to 16°C (61°F) and lows dropping to around -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec434343424140404143434444
Data source: Temperature data for Santa Rosa 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 Santa Rosa

In Santa Rosa in September, the precipitation amount is 83 mm (3.3 in) spread over 22 days.

September Precipitation Trends in Santa Rosa

The chart displays monthly precipitation patterns in Santa Rosa, 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 Santa Rosa, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec2593042841274613172683162184245
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Santa Rosa

In Santa Rosa in September, humidity is 53%. With an average temperature of 6°C (43°F), this humidity feels like a crisp, invigorating chill that can make exploring outdoors refreshing yet slightly uncomfortable, requiring warm layers and occasional breaks to warm up.

September Average Humidity in Santa Rosa

This chart illustrates the average monthly humidity levels in Santa Rosa, 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 Santa Rosa 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 Santa Rosa

In Santa Rosa 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 Santa Rosa, you can check Hourly UV Index in Santa Rosa.

Maximum UV Index Levels in Santa Rosa for September

The chart shows the monthly maximum UV Index (UVI) for Santa Rosa 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 Santa Rosa typically reaches 17, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec232222181412131517182024
Data source: Santa Rosa 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 Santa Rosa Compares to Other Months

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

This table compares monthly weather conditions in Santa Rosa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)259 mm (10.2 inches)89%extreme
February Weather6°C (43°F)304 mm (12.0 inches)90%extreme
March Weather6°C (43°F)284 mm (11.2 inches)90%extreme
April Weather6°C (42°F)127 mm (5.0 inches)90%extreme
May Weather5°C (41°F)46 mm (1.8 inches)84%extreme
June Weather5°C (41°F)13 mm (0.5 inches)67%extreme
July Weather5°C (41°F)16 mm (0.6 inches)53%extreme
August Weather5°C (42°F)25 mm (1.0 inches)47%extreme
September Weather6°C (43°F)83 mm (3.3 inches)53%extreme
October Weather6°C (43°F)162 mm (6.4 inches)67%extreme
November Weather7°C (45°F)184 mm (7.3 inches)75%extreme
December Weather7°C (44°F)245 mm (9.7 inches)82%extreme

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