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September Weather in San Patricio, Mexico

Last updated: August 27, 2025

The average temperature in San Patricio, Mexico during September is a warm 28°C (82°F). Expect a minimum of 25°C (77°F) and a maximum of 33°C (91°F). Be prepared for considerable precipitation, with 235 mm (9.2 in) expected over 20 days, alongside an average humidity of 83%.

September Temperature in San Patricio

In September, in San Patricio, the average temperature is 28°C (82°F). The maximum can reach 33°C (91°F), while the minimum can be as low as 25°C (77°F). This pleasant climate makes it an ideal destination for travelers seeking warm weather and outdoor activities.

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

The chart illustrates September temperature patterns in San Patricio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Patricio, September typically has an average temperature of 28°C (82°F), with highs reaching up to 33°C (91°F) and lows dropping to around 25°C (77°F).
JanFebMarAprMayJunJulAugSepOctNovDec757575757781838282827977
Data source: Temperature data for San Patricio 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 Patricio

In San Patricio in September, the precipitation amount reaches 235 mm (9.2 in) over a span of 20 days.

September Precipitation Trends in San Patricio

The chart displays monthly precipitation patterns in San Patricio, 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 Patricio, September typically receives around 235 mm (9.2 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec91700111768267235168306
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Patricio

In San Patricio in September humidity is 83%. With an average temperature of 28°C (82°F), this humidity feels like stepping into a warm, thick blanket, making travel languid and drenched in sweat.

September Average Humidity in San Patricio

This chart illustrates the average monthly humidity levels in San Patricio, 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 Patricio is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec70%65%59%60%67%80%81%83%83%80%77%76%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Patricio

In San Patricio 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 San Patricio.

Maximum UV Index Levels in San Patricio for September

The chart shows the monthly maximum UV Index (UVI) for San Patricio 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 Patricio typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec910131313141212131297
Data source: San Patricio 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 Patricio Compares to Other Months

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

This table compares monthly weather conditions in San Patricio, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)9 mm (0.3 inches)70%very high
February Weather24°C (75°F)16 mm (0.6 inches)65%very high
March Weather24°C (75°F)0 mm (0.0 inches)59%extreme
April Weather24°C (75°F)0 mm (0.0 inches)60%extreme
May Weather25°C (77°F)1 mm (0.0 inches)67%extreme
June Weather27°C (81°F)116 mm (4.6 inches)80%extreme
July Weather28°C (83°F)68 mm (2.7 inches)81%extreme
August Weather28°C (83°F)267 mm (10.5 inches)83%extreme
September Weather28°C (82°F)235 mm (9.2 inches)83%extreme
October Weather28°C (82°F)168 mm (6.6 inches)80%extreme
November Weather26°C (80°F)30 mm (1.2 inches)77%very high
December Weather25°C (77°F)6 mm (0.2 inches)76%high

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