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September Weather in Horseshoe Bay, United States

Last updated: June 24, 2025

In Horseshoe Bay, United States, the average temperature in September hovers around 26°C (79°F), making it quite pleasant. However, temperatures can dip as low as 9°C (49°F) at night, while peak daytime heat can reach a scorching 38°C (101°F). Expect 90 mm (3.6 in) of rainfall spread over 8 days, contributing to an average humidity of 66%. Prepare accordingly for both sunny days and occasional showers!

September Temperature in Horseshoe Bay

In September in Horseshoe Bay, the average temperature is 26°C (79°F), with maximums reaching up to 38°C (101°F) and minimums dropping as low as 9°C (49°F). It's advisable to pack a range of clothing to accommodate both warm and cool temperatures during your travels.

September Weather in Horseshoe Bay: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Horseshoe Bay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Horseshoe Bay, September typically has an average temperature of 26°C (79°F), with highs reaching up to 38°C (101°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec505263687682858579705954
Data source: Temperature data for Horseshoe Bay 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 Horseshoe Bay

In Horseshoe Bay in September, the total precipitation amount is 90 mm (3.6 in) spread over the course of 8 days.

September Precipitation Trends in Horseshoe Bay

The chart displays monthly precipitation patterns in Horseshoe Bay, 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 Horseshoe Bay, September typically receives around 90 mm (3.6 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec4354597413871628490943245
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Horseshoe Bay

In Horseshoe Bay in September, humidity is 66%. With an average temperature of 26°C (79°F), this humidity feels like a warm, enveloping blanket, making outdoor activities invigorating yet requiring occasional breaks in the shade to stay comfortable while traveling.

September Average Humidity in Horseshoe Bay

This chart illustrates the average monthly humidity levels in Horseshoe Bay, 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 Horseshoe Bay is approximately 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%78%77%78%82%78%69%63%66%73%84%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Horseshoe Bay

In Horseshoe Bay 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 Horseshoe Bay.

Maximum UV Index Levels in Horseshoe Bay for September

The chart shows the monthly maximum UV Index (UVI) for Horseshoe Bay 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 Horseshoe Bay typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111112121111965
Data source: Horseshoe Bay 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 Horseshoe Bay Compares to Other Months

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

This table compares monthly weather conditions in Horseshoe Bay, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)43 mm (1.7 inches)78%moderate
February Weather11°C (53°F)54 mm (2.1 inches)78%high
March Weather17°C (63°F)59 mm (2.3 inches)77%very high
April Weather20°C (68°F)74 mm (2.9 inches)78%extreme
May Weather24°C (76°F)138 mm (5.4 inches)82%extreme
June Weather28°C (82°F)70 mm (2.8 inches)78%extreme
July Weather30°C (85°F)62 mm (2.4 inches)69%extreme
August Weather30°C (86°F)84 mm (3.3 inches)63%extreme
September Weather26°C (79°F)90 mm (3.6 inches)66%extreme
October Weather21°C (70°F)94 mm (3.7 inches)73%very high
November Weather15°C (59°F)32 mm (1.3 inches)84%high
December Weather12°C (54°F)44 mm (1.8 inches)87%moderate

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