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September Weather in Del Rio, United States

Last updated: June 24, 2025

In September, the average temperature in Del Rio, United States is a warm 28°C (83°F). Expect a minimum of 13°C (56°F) and a maximum soaring up to 41°C (106°F). During this month, you can anticipate about 121 mm (4.8 in) of precipitation spread over 8 days, with an average humidity of 68%.

September Temperature in Del Rio

In September in Del Rio, the average temperature is 28°C (83°F). The maximum can reach 41°C (106°F), while the minimum can drop as low as 13°C (56°F). Be prepared for a wide range of temperatures when traveling during this time.

September Weather in Del Rio: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Del Rio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Del Rio, September typically has an average temperature of 28°C (83°F), with highs reaching up to 41°C (106°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec535767738186888882736256
Data source: Temperature data for Del Rio 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 Del Rio

In Del Rio in September, the precipitation amount is 121 mm (4.8 in) over the course of 8 days.

September Precipitation Trends in Del Rio

The chart displays monthly precipitation patterns in Del Rio, 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 Del Rio, September typically receives around 121 mm (4.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec2227293878433126121591222
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Del Rio

In Del Rio in September, humidity is 68%. With an average temperature of 28°C (83°F), this humidity feels like a thick blanket enveloping you, making outdoor excursions somewhat strenuous and the air heavy as you explore.

September Average Humidity in Del Rio

This chart illustrates the average monthly humidity levels in Del Rio, 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 Del Rio is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%75%70%73%79%78%65%55%68%77%84%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Del Rio

In Del Rio 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 Del Rio.

Maximum UV Index Levels in Del Rio for September

The chart shows the monthly maximum UV Index (UVI) for Del Rio 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 Del Rio typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5810111212121211965
Data source: Del Rio 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 Del Rio Compares to Other Months

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

This table compares monthly weather conditions in Del Rio, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (53°F)22 mm (0.9 inches)76%moderate
February Weather14°C (57°F)27 mm (1.0 inches)75%very high
March Weather19°C (67°F)29 mm (1.1 inches)70%very high
April Weather23°C (74°F)38 mm (1.5 inches)73%extreme
May Weather27°C (81°F)78 mm (3.1 inches)79%extreme
June Weather30°C (86°F)43 mm (1.7 inches)78%extreme
July Weather31°C (88°F)31 mm (1.2 inches)65%extreme
August Weather31°C (88°F)26 mm (1.0 inches)55%extreme
September Weather28°C (83°F)121 mm (4.8 inches)68%extreme
October Weather23°C (73°F)59 mm (2.3 inches)77%very high
November Weather17°C (63°F)12 mm (0.5 inches)84%high
December Weather13°C (56°F)22 mm (0.9 inches)87%moderate

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