Brownsville Weather in September

September in Brownsville sees daytime temperatures around 33°C (91°F) and lows of 23°C (73°F) at night. As the wettest month of the year, keep in mind that rainfall is at its highest.

Rainfall in Brownsville in September

The month brings the heaviest rain of the year, often in intense bursts. Make sure to have a poncho to stay dry during the showers. Records from the past 30 years suggest around 15 days of rain, with 180 mm (7.1 in) average for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Brownsville in September

In September, Brownsville sees very high temperatures, with highs of 33°C (91°F). Nights drop to around 23°C (73°F). Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. With lows around 23°C (73°F), the nights are warm enough that a sheet is usually all you need for bedding.

Sunshine in Brownsville in September

The days are predominantly sunny, with an estimated total of around 246 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Wind Speed in Brownsville in September

Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

September in Brownsville has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Brownsville's climate page.

Brownsville Temperature in September

Min Temperature 23°C (73°F)  

Max Temperature 33°C (91°F)  

Chance of Rain 49%  

Precipitation 180 mm (7.1 in)  

Rainy days 15 days  

Humidity 76%  

Windspeed 4 m/s (8 knots)  

Sunshine 246 hours  

Percentage Sunshine 67%  

What to Wear in Brownsville in September

Warm but pleasant conditions in Brownsville in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Brownsville in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

8/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Brownsville's climate page.

More climate data for Brownsville

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Brownsville climate overview or explore weather in the United States of America.