Brownsville, TX Climate & Monthly Averages
The climate of Brownsville
Brownsville has a humid subtropical climate, marked by hot, humid summers and generally mild winters. Average daytime highs range from about 71°F (21°C) in January to around 93°F (34°C) in August, and the city records roughly 115 days of measurable precipitation a year.
Climate quick facts
- Hottest month: August - highs near 93°F (34°C)
- Coldest month: January - highs near 71°F (21°C)
- Record high: 105°F (40°C) · Record low: 24°F (-5°C) (2015–2024)
- Wettest month: September (16 rainy days) · Sunniest: August (12.2 h sun/day)
- Climate type: humid subtropical - hot, humid summers and generally mild winters
Temperatures through the year
The warmest stretch of the year centers on August. Highs average 93°F (34°C) and overnight lows stay near 80°F (26°C). The coolest month is January, with typical highs of 71°F (21°C) and lows around 56°F (13°C). Based on 2015–2024 weather data, temperatures have reached as high as 105°F (40°C) and dropped as low as 24°F (-5°C).
Rain, sun and snow
September is usually the wettest month. It brings about 5.4 inches (136 mm) of rain over 16 days, while February is the driest. August brings the most sunshine, averaging 12.2 hours of sun a day.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 71° | 56° | 8 | 1.8 in | 7.5 h/day | 73% |
| February | 74° | 58° | 6 | 1.2 in | 8.1 h/day | 75% |
| March | 79° | 65° | 8 | 2.6 in | 8.3 h/day | 76% |
| April | 83° | 70° | 8 | 2.8 in | 9.8 h/day | 75% |
| May | 88° | 75° | 10 | 3.0 in | 11.4 h/day | 77% |
| June | 90° | 78° | 12 | 3.4 in | 12.0 h/day | 76% |
| July | 92° | 79° | 9 | 2.9 in | 12.0 h/day | 73% |
| August | 93° | 80° | 10 | 2.3 in | 12.2 h/day | 72% |
| September | 89° | 77° | 16 | 5.4 in | 10.4 h/day | 76% |
| October | 85° | 71° | 11 | 2.9 in | 9.7 h/day | 73% |
| November | 78° | 64° | 10 | 2.6 in | 7.9 h/day | 76% |
| December | 74° | 60° | 7 | 1.4 in | 7.4 h/day | 75% |
Brownsville month by month
Brownsville weather in January
January brings highs around 71°F (21°C), lows near 56°F (13°C), about 8 wet days - typically the coldest month of the year in Brownsville.
Brownsville weather in February
February brings highs around 74°F (23°C), lows near 58°F (15°C), about 6 wet days - typically the driest month of the year in Brownsville.
Brownsville weather in March
March brings highs around 79°F (26°C), lows near 65°F (18°C), about 8 wet days.
Brownsville weather in April
April brings highs around 83°F (29°C), lows near 70°F (21°C), about 8 wet days.
Brownsville weather in May
May brings highs around 88°F (31°C), lows near 75°F (24°C), about 10 wet days.
Brownsville weather in June
June brings highs around 90°F (32°C), lows near 78°F (26°C), about 12 wet days.
Brownsville weather in July
July brings highs around 92°F (33°C), lows near 79°F (26°C), about 9 wet days.
Brownsville weather in August
August brings highs around 93°F (34°C), lows near 80°F (26°C), about 10 wet days - typically the hottest month and the sunniest month of the year in Brownsville.
Brownsville weather in September
September brings highs around 89°F (32°C), lows near 77°F (25°C), about 16 wet days - typically the wettest month of the year in Brownsville.
Brownsville weather in October
October brings highs around 85°F (30°C), lows near 71°F (22°C), about 11 wet days.
Brownsville weather in November
November brings highs around 78°F (26°C), lows near 64°F (18°C), about 10 wet days.
Brownsville weather in December
December brings highs around 74°F (23°C), lows near 60°F (15°C), about 7 wet days.
Seasons in Brownsville
Spring (March through May)
Spring in Brownsville is hot, with daytime highs averaging 83°F (29°C) and nights around 70°F (21°C); expect showers on roughly 26 days across the season. With the humidity factored in, afternoons often feel hotter than the thermometer reads - run the numbers through the humidity and dew point converter to see why.
Summer (June through August)
Summer in Brownsville turns very hot, with daytime highs averaging 92°F (33°C) and nights around 79°F (26°C); expect showers on roughly 31 days across the season.
Fall (September through November)
Fall in Brownsville brings hot afternoons, with daytime highs averaging 84°F (29°C) and nights around 71°F (21°C); expect showers on roughly 37 days across the season.
Winter (December through February)
Winter in Brownsville brings comfortable warmth, with daytime highs averaging 73°F (23°C) and nights around 58°F (14°C); expect showers on roughly 22 days across the season.
Climate questions, answered
What is the average temperature in Brownsville?
Is Brownsville hot in summer?
Is Brownsville cold in winter?
How many rainy days does Brownsville get in a year?
Best time to visit Brownsville
The best time to visit Brownsville is generally November to April, when warm days, manageable rainfall and plenty of daylight line up. Daytime temperatures in that window typically sit near 76°F (25°C).
Pack for Brownsville with lightweight, breathable clothing and strong sun protection for the hot months; a compact umbrella or rain shell - showers are a regular feature; moisture-wicking fabrics to cope with the humidity. Evenings can feel noticeably cooler than afternoons - August nights average 80°F (26°C).
Brownsville temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.