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September Weather in Robstown, United States

Last updated: June 24, 2025

In Robstown, United States, the average temperature in September is a warm 28°C (82°F), with a minimum of 15°C (59°F) and soaring to a maximum of 38°C (100°F). During this time, expect about 112 mm (4.4 in) of precipitation spread over 14 days, contributing to an average humidity of 73%. Stay prepared for a mix of warmth and moisture!

September Temperature in Robstown

In September in Robstown, the average temperature is 28°C (82°F). Maximums can reach 38°C (100°F), and minimums can be as low as 15°C (59°F). This makes Robstown an ideal destination for travelers seeking warmth during this time of year.

September Weather in Robstown: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Robstown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Robstown, September typically has an average temperature of 28°C (82°F), with highs reaching up to 38°C (100°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec586169748083858682756661
Data source: Temperature data for Robstown 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 Robstown

In Robstown in September, the precipitation amount is 112 mm (4.4 in) spread over 14 days.

September Precipitation Trends in Robstown

The chart displays monthly precipitation patterns in Robstown, 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 Robstown, September typically receives around 112 mm (4.4 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec3225604711912210571112574142
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Robstown

In Robstown in September humidity is 73%. With an average temperature of 28°C (82°F), this humidity feels like stepping into a warm, thick blanket, making traveling feel sticky and heavier; staying hydrated and taking breaks in the shade becomes essential.

September Average Humidity in Robstown

This chart illustrates the average monthly humidity levels in Robstown, 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 Robstown is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%79%76%77%80%73%66%65%73%76%80%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Robstown

In Robstown 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 Robstown.

Maximum UV Index Levels in Robstown for September

The chart shows the monthly maximum UV Index (UVI) for Robstown 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 Robstown typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec6810111112121211975
Data source: Robstown 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 Robstown Compares to Other Months

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

This table compares monthly weather conditions in Robstown, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather15°C (59°F)32 mm (1.3 inches)83%high
February Weather16°C (62°F)25 mm (1.0 inches)79%very high
March Weather21°C (69°F)60 mm (2.4 inches)76%very high
April Weather23°C (74°F)47 mm (1.9 inches)77%extreme
May Weather27°C (80°F)119 mm (4.7 inches)80%extreme
June Weather29°C (84°F)122 mm (4.8 inches)73%extreme
July Weather29°C (85°F)105 mm (4.1 inches)66%extreme
August Weather30°C (86°F)70 mm (2.8 inches)65%extreme
September Weather28°C (82°F)112 mm (4.4 inches)73%extreme
October Weather24°C (76°F)57 mm (2.2 inches)76%very high
November Weather19°C (66°F)41 mm (1.6 inches)80%high
December Weather16°C (61°F)42 mm (1.7 inches)86%moderate

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