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September Weather in San Angelo, United States

Last updated: June 24, 2025

In San Angelo, United States, the average temperature in September hovers around 26°C (78°F), offering a pleasant climate. However, temperatures can swing from a cool 7°C (45°F) to a sizzling 39°C (102°F). During this month, expect about 71 mm (2.8 in) of precipitation spread over 6 days, with an average humidity of 67% creating a refreshing atmosphere.

September Temperature in San Angelo

In September in San Angelo, the average temperature is 26°C (78°F), with maximums reaching 39°C (102°F) and minimums dropping as low as 7°C (45°F). Travelers can expect warm weather, but should be prepared for significant temperature fluctuations, especially in the evenings.

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

The chart illustrates September temperature patterns in San Angelo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Angelo, September typically has an average temperature of 26°C (78°F), with highs reaching up to 39°C (102°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec475061677682858478685751
Data source: Temperature data for San Angelo 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 Angelo

In San Angelo in September, the precipitation amount is 71 mm (2.8 in) over a span of 6 days.

September Precipitation Trends in San Angelo

The chart displays monthly precipitation patterns in San Angelo, 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 Angelo, September typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec2523514910350213571562825
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Angelo

In San Angelo in September humidity is 67%. With average temperature 26°C (78°F), this humidity feels like a warm embrace, making it essential for travelers to stay hydrated while enjoying leisurely strolls and exploring the vibrant surroundings.

September Average Humidity in San Angelo

This chart illustrates the average monthly humidity levels in San Angelo, 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 Angelo is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%74%69%70%77%76%66%60%67%72%84%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Angelo

In San Angelo 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 Angelo.

Maximum UV Index Levels in San Angelo for September

The chart shows the monthly maximum UV Index (UVI) for San Angelo 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 Angelo typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111212121111864
Data source: San Angelo 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 Angelo Compares to Other Months

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

This table compares monthly weather conditions in San Angelo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)25 mm (1.0 inches)74%moderate
February Weather10°C (50°F)23 mm (0.9 inches)74%high
March Weather16°C (61°F)51 mm (2.0 inches)68%very high
April Weather19°C (67°F)49 mm (1.9 inches)70%extreme
May Weather24°C (76°F)103 mm (4.0 inches)77%extreme
June Weather28°C (82°F)49 mm (1.9 inches)76%extreme
July Weather29°C (85°F)21 mm (0.8 inches)66%extreme
August Weather29°C (85°F)35 mm (1.4 inches)60%extreme
September Weather26°C (78°F)71 mm (2.8 inches)67%extreme
October Weather20°C (68°F)56 mm (2.2 inches)72%very high
November Weather14°C (57°F)28 mm (1.1 inches)83%high
December Weather11°C (51°F)25 mm (1.0 inches)85%moderate

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