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September Weather in Santa Ana, Mexico

Last updated: August 27, 2025

In Santa Ana, Mexico, the average temperature in September hovers around 27°C (81°F). However, temperatures can vary significantly, with minimums dipping to 13°C (55°F) and soaring to a maximum of 40°C (105°F). Expect some rain, as 49 mm (1.9 in) of precipitation is typical over 6 days, alongside an average humidity of 72%.

September Temperature in Santa Ana

In September in Santa Ana, the average temperature is 27°C (81°F). Maximum temperatures can reach 40°C (105°F), while minimums can dip as low as 13°C (55°F). Make sure to pack accordingly to enjoy your trip comfortably in this varied climate.

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

The chart illustrates September temperature patterns in Santa Ana, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santa Ana, September typically has an average temperature of 27°C (81°F), with highs reaching up to 40°C (105°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec555663717787858481746555
Data source: Temperature data for Santa Ana 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 Ana

In Santa Ana in September, the precipitation amount is 49 mm (1.9 in) over the course of 6 days.

September Precipitation Trends in Santa Ana

The chart displays monthly precipitation patterns in Santa Ana, 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 Ana, September typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec323122436855949133325
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Santa Ana

In Santa Ana in September humidity is 72%. With an average temperature of 27°C (81°F), this humidity feels like walking through a warm, damp blanket, making travel a bit uncomfortable as you navigate through the thick, sticky air.

September Average Humidity in Santa Ana

This chart illustrates the average monthly humidity levels in Santa Ana, 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 Ana is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%71%60%43%32%28%38%60%72%66%74%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Santa Ana

In Santa Ana in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Santa Ana.

Maximum UV Index Levels in Santa Ana for September

The chart shows the monthly maximum UV Index (UVI) for Santa Ana 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 Ana typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5710121212121211965
Data source: Santa Ana 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 Ana Compares to Other Months

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

This table compares monthly weather conditions in Santa Ana, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (55°F)32 mm (1.3 inches)74%moderate
February Weather13°C (57°F)31 mm (1.2 inches)71%high
March Weather17°C (63°F)22 mm (0.9 inches)60%very high
April Weather22°C (71°F)4 mm (0.2 inches)43%extreme
May Weather25°C (77°F)3 mm (0.1 inches)32%extreme
June Weather30°C (87°F)6 mm (0.2 inches)28%extreme
July Weather29°C (85°F)85 mm (3.4 inches)38%extreme
August Weather29°C (85°F)59 mm (2.3 inches)60%extreme
September Weather27°C (81°F)49 mm (1.9 inches)72%extreme
October Weather23°C (74°F)13 mm (0.5 inches)66%very high
November Weather19°C (66°F)33 mm (1.3 inches)74%high
December Weather13°C (56°F)25 mm (1.0 inches)81%moderate

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