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Weather in Brownsville for September 2025

Your guide to Brownsville weather in September - trends and predictions
  • In general, the average temperature in Brownsville at the beginning of September is 34.4 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 33.6 °F by the end of September.

  • With an average of 5 rainy days, Brownsville experiences minimal rainfall in September, ensuring that most days remain pleasantly dry.

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Average dry days
25
Dry days
Average rainy days
5
Rainy days
Average snowy days
0
Snow days
Average temperatures
36°/26°
Temperatures
Average wind speed
26 km/h
Avg max wind
Average humidity
67 %
Avg humidity

Brownsville in September average weather

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Temperatures trend during September in Brownsville

See the weather trend as well as the moving average line

September weather day by day

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Date Weather Temperatures Rain UV More
Sept. 1 Mist
Mist
36° /26° 0.7 mm 8
Sept. 2 Cloudy
Cloudy
34° /25° 2.3 mm 8
Sept. 3 Mist
Mist
35° /25° 6.7 mm 8
Sept. 4 Mist
Mist
34° /26° 16.9 mm 8
Sept. 5 Overcast
Overcast
34° /26° 2.3 mm 8
Sept. 6 Patchy rain possible
Patchy rain possible
35° /26° 2.6 mm 8
Sept. 7 Cloudy
Cloudy
33° /26° 0.1 mm 7
Sept. 8 Partly cloudy
Partly cloudy
32° /26° 9.8 mm 8
Sept. 9 Cloudy
Cloudy
33° /25° 0.9 mm 7
Sept. 10 Patchy rain possible
Patchy rain possible
31° /25° 36.9 mm 7
Sept. 11 Overcast
Overcast
34° /25° 0.1 mm 8
Sept. 12 Partly cloudy
Partly cloudy
34° /24° 0.4 mm 8
Sept. 13 Partly cloudy
Partly cloudy
34° /26° 0 mm 8
Sept. 14 Partly cloudy
Partly cloudy
35° /26° 0 mm 8
Sept. 15 Cloudy
Cloudy
34° /27° 2.3 mm 8
Sept. 16 Thundery outbreaks possible
Thundery outbreaks possible
33° /26° 2.8 mm 8
Sept. 17 Light rain shower
Light rain shower
33° /25° 3.3 mm 7
Sept. 18 Patchy rain possible
Patchy rain possible
35° /24° 1.1 mm 8
Sept. 19 Moderate rain at times
Moderate rain at times
33° /25° 2.2 mm 7
Sept. 20 Partly cloudy
Partly cloudy
33° /25° 0 mm 8
Sept. 21 Patchy rain possible
Patchy rain possible
35° /25° 0 mm 8
Sept. 22 Partly cloudy
Partly cloudy
34° /25° 0.1 mm 8
Sept. 23 Overcast
Overcast
34° /26° 0 mm 7
Sept. 24 Patchy rain possible
Patchy rain possible
35° /26° 0.1 mm 8
Sept. 25 Cloudy
Cloudy
33° /26° 0 mm 8
Sept. 26 Cloudy
Cloudy
32° /25° 0 mm 7
Sept. 27 Patchy rain possible
Patchy rain possible
34° /22° 0.9 mm 7
Sept. 28 Patchy rain possible
Patchy rain possible
34° /24° 0 mm 8
Sept. 29 Patchy rain possible
Patchy rain possible
34° /24° 0.1 mm 8
Sept. 30 Light rain shower
Light rain shower
33° /25° 0.6 mm 7
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Important Notice
Our weather forecast for Brownsville in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Brownsville forecast closer to your planned date for the most up-to-date weather information.

Brownsville in September - FAQ

What are the expected maximum and minimum temperatures in Brownsville during September?
With daytime temperatures soaring above 36° and not dropping much below 26° at night, September in Brownsville is quite hot. Staying hydrated and avoiding peak sun hours is advisable.
How much rainfall should be expected in Brownsville during September?
Expect minimal rainfall in Brownsville during September, with a total of 17.3 mm over approximately 5 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Brownsville during September?
The average wind speed in Brownsville during September is 26 km/h, suggesting breezy to windy conditions, depending on your activities.

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Location coordinates Where is Brownsville?

Get accurate weather forecasts for Brownsville, located at latitude 25.902 and longitude -97.497. Stay updated with localized weather information tailored for Brownsville.

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