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September Weather in San Antonito, United States

Last updated: June 24, 2025

In September, the average temperature in San Antonito, United States is a comfortable 19°C (67°F). However, temperatures can vary widely, with a minimum of 2°C (35°F) and a maximum of 33°C (92°F). Expect about 38 mm (1.5 in) of precipitation spread over 5 days, and enjoy an average humidity level of 72%.

September Temperature in San Antonito

In September in San Antonito, the average temperature is 19°C (67°F), with maximums hitting 33°C (92°F) and minimums dropping to 2°C (35°F). This varied climate makes it a great time to explore San Antonito, so be sure to pack for both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in San Antonito, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Antonito, September typically has an average temperature of 19°C (67°F), with highs reaching up to 33°C (92°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec313545536372747267534334
Data source: Temperature data for San Antonito 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 Antonito

In San Antonito in September, the total precipitation amount is 38 mm (1.5 in) spread over a duration of 5 days.

September Precipitation Trends in San Antonito

The chart displays monthly precipitation patterns in San Antonito, 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 Antonito, September typically receives around 38 mm (1.5 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec232426282735914238552416
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Antonito

In San Antonito in September, humidity is 72%. With an average temperature of 19°C (67°F), this humidity feels like a warm, damp blanket enveloping you, making outdoor activities a bit more challenging but also giving the air a refreshing quality that's invigorating for short excursions.

September Average Humidity in San Antonito

This chart illustrates the average monthly humidity levels in San Antonito, 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 Antonito is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%79%66%60%57%55%57%65%72%78%81%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Antonito

In San Antonito 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 San Antonito.

Maximum UV Index Levels in San Antonito for September

The chart shows the monthly maximum UV Index (UVI) for San Antonito 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 Antonito typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111213121211864
Data source: San Antonito 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 Antonito Compares to Other Months

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

This table compares monthly weather conditions in San Antonito, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (31°F)23 mm (0.9 inches)78%moderate
February Weather2°C (35°F)24 mm (1.0 inches)79%high
March Weather7°C (45°F)26 mm (1.0 inches)66%very high
April Weather12°C (54°F)28 mm (1.1 inches)60%extreme
May Weather17°C (63°F)27 mm (1.1 inches)57%extreme
June Weather22°C (73°F)34 mm (1.4 inches)55%extreme
July Weather23°C (74°F)91 mm (3.6 inches)56%extreme
August Weather22°C (72°F)42 mm (1.7 inches)65%extreme
September Weather19°C (67°F)38 mm (1.5 inches)72%extreme
October Weather12°C (53°F)55 mm (2.2 inches)78%very high
November Weather6°C (43°F)24 mm (0.9 inches)81%high
December Weather1°C (34°F)16 mm (0.6 inches)79%moderate

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