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September Weather in San Ramon, Peru

Last updated: August 27, 2025

In September, the average temperature in San Ramon, Peru hovers around 18°C (64°F). Expect a comfortable range, with minimums dropping to 10°C (51°F) and maximums reaching 26°C (80°F). While you enjoy the mild weather, be prepared for approximately 86 mm (3.4 in) of rainfall over 16 days. With an average humidity of 40%, it’s the perfect time to explore the beauty of San Ramon!

September Temperature in San Ramon

In September in San Ramon, the average temperature is 18°C (64°F), with maximums reaching 26°C (80°F) and minimums dropping to as low as 10°C (51°F). This mild climate makes San Ramon an inviting destination for travelers seeking comfortable weather.

September Weather in San Ramon: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Ramon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Ramon, September typically has an average temperature of 18°C (64°F), with highs reaching up to 26°C (80°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec646464646363616264646565
Data source: Temperature data for San Ramon 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 San Ramon

In San Ramon in September, the precipitation amount is 86 mm (3.4 in) over a period of 16 days.

September Precipitation Trends in San Ramon

The chart displays monthly precipitation patterns in San Ramon, 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 San Ramon, September typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec48551340423611999606686166318431
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Ramon

In San Ramon in September, humidity is 40%. With an average temperature of 18°C (64°F), this humidity feels like a refreshing breeze, making it a pleasant time for traveling and exploring the outdoors.

September Average Humidity in San Ramon

This chart illustrates the average monthly humidity levels in San Ramon, 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 San Ramon is approximately 40%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%90%91%89%85%65%47%38%40%56%76%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Ramon

In San Ramon in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Ramon, you can check here.

Maximum UV Index Levels in San Ramon for September

The chart shows the monthly maximum UV Index (UVI) for San Ramon 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 San Ramon typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec171717161311111314161716
Data source: San Ramon 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 San Ramon Compares to Other Months

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

This table compares monthly weather conditions in San Ramon, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather18°C (64°F)485 mm (19.1 inches)91%extreme
February Weather18°C (64°F)513 mm (20.2 inches)90%extreme
March Weather18°C (65°F)404 mm (15.9 inches)91%extreme
April Weather18°C (64°F)236 mm (9.3 inches)89%extreme
May Weather17°C (64°F)119 mm (4.7 inches)85%extreme
June Weather17°C (63°F)99 mm (3.9 inches)65%extreme
July Weather16°C (62°F)60 mm (2.4 inches)47%extreme
August Weather17°C (62°F)66 mm (2.6 inches)38%extreme
September Weather18°C (64°F)86 mm (3.4 inches)40%extreme
October Weather18°C (65°F)166 mm (6.5 inches)56%extreme
November Weather18°C (65°F)318 mm (12.5 inches)76%extreme
December Weather18°C (65°F)431 mm (17.0 inches)90%extreme

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