Brownsville, TX Climate & Monthly Averages
The climate of Brownsville
Brownsville records 115 wet days and 9.7 hours of daily sunshine in an average year. Temperatures follow a humid subtropical pattern, running 71°F (21°C) in January up to 93°F (34°C) in August.
Climate quick facts
- Hottest month: August - highs near 93°F (34°C)
- Coldest month: January - highs near 71°F (21°C)
- Decade extremes (2015-2024): 105°F (40°C) high · 24°F (-5°C) low
- Wettest month: September (16 rainy days) · Sunniest: August (12.2 h sun/day)
- Climate type: humid subtropical
- Annual swing: 13°C between the average warmest and coolest month · day to night: 8°C
- Months averaging 30°C or hotter: 5
- Average humidity: 75%
Temperatures through the year
Warmth peaks in August: highs of 93°F (34°C), lows of 80°F (26°C). January is the coolest month, with highs of 71°F (21°C) and lows near 56°F (13°C). Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 105°F (40°C) and the lowest daily minimum 24°F (-5°C). Five of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is November through March.
Rain, sun and snow
Precipitation concentrates in September - 5.4 inches (136 mm) on 16 days - and thins out by February. Average highs hold at or above 30°C for 5 months of the year, May through September being the unbroken run.
How Brownsville compares
- Brownsville sits close to the middle of our dataset on most measures: 75°F (24°C) as an annual average, 32.2 inches (818 mm) of precipitation and 9.7 hours of sun a day.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 71° | 56° | 8 | 1.8 in | 7.5 h/day | 10.7 h | 27% | 73% |
| February | 74° | 58° | 6 | 1.2 in | 8.1 h/day | 11.2 h | 22% | 75% |
| March | 79° | 65° | 8 | 2.6 in | 8.3 h/day | 11.9 h | 25% | 76% |
| April | 83° | 70° | 8 | 2.8 in | 9.8 h/day | 12.7 h | 28% | 75% |
| May | 88° | 75° | 10 | 3.0 in | 11.4 h/day | 13.4 h | 31% | 77% |
| June | 90° | 78° | 12 | 3.4 in | 12.0 h/day | 13.7 h | 39% | 76% |
| July | 92° | 79° | 9 | 2.9 in | 12.0 h/day | 13.6 h | 29% | 73% |
| August | 93° | 80° | 10 | 2.3 in | 12.2 h/day | 13.0 h | 34% | 72% |
| September | 89° | 77° | 16 | 5.4 in | 10.4 h/day | 12.3 h | 53% | 76% |
| October | 85° | 71° | 11 | 2.9 in | 9.7 h/day | 11.5 h | 35% | 73% |
| November | 78° | 64° | 10 | 2.6 in | 7.9 h/day | 10.8 h | 33% | 76% |
| December | 74° | 60° | 7 | 1.4 in | 7.4 h/day | 10.5 h | 22% | 75% |
Brownsville month by month
Average high and low for each month, with the bar showing where it sits in Brownsville's year (left is the coldest night, right is the warmest afternoon).
January
- Rain
- 8 days
- Sunshine
- 7.5 h
- Daylight
- 10.7 h
February
- Rain
- 6 days
- Sunshine
- 8.1 h
- Daylight
- 11.2 h
March
- Rain
- 8 days
- Sunshine
- 8.3 h
- Daylight
- 11.9 h
April
- Rain
- 8 days
- Sunshine
- 9.8 h
- Daylight
- 12.7 h
May
- Rain
- 10 days
- Sunshine
- 11.4 h
- Daylight
- 13.4 h
June
- Rain
- 12 days
- Sunshine
- 12.0 h
- Daylight
- 13.7 h
July
- Rain
- 9 days
- Sunshine
- 12.0 h
- Daylight
- 13.6 h
August
- Rain
- 10 days
- Sunshine
- 12.2 h
- Daylight
- 13.0 h
September
- Rain
- 16 days
- Sunshine
- 10.4 h
- Daylight
- 12.3 h
October
- Rain
- 11 days
- Sunshine
- 9.7 h
- Daylight
- 11.5 h
November
- Rain
- 10 days
- Sunshine
- 7.9 h
- Daylight
- 10.8 h
December
- Rain
- 7 days
- Sunshine
- 7.4 h
- Daylight
- 10.5 h
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
Seasons in Brownsville
Spring (March through May)
Through spring, Brownsville runs hot: 83°F (29°C) by day, 70°F (21°C) after dark, and expect showers on roughly 26 days across the season. With the moisture factored in, afternoons feel hotter than the reading suggests - the humidity and dew point converter shows 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); rain falls on around 31 of the 90 days. Daylight is generous - around 12.1 hours of sun a day.
Fall (September through November)
Through fall, Brownsville brings hot afternoons: 84°F (29°C) by day, 71°F (21°C) after dark, and rain falls on around 37 of the 90 days.
Winter (December through February)
Through winter, Brownsville is mild and warm: 73°F (23°C) by day, 58°F (14°C) after dark, and expect showers on roughly 22 days across the season.
Climate questions, answered
How humid does Brownsville get?
What should I wear in Brownsville?
What is the average temperature in Brownsville?
How many hot months does Brownsville have?
Is Brownsville cold in winter?
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 sit near 76°F (25°C), with rain on about 8 days a month. For the same question asked the other way round, see where else is warm in November.
Pack for Brownsville with lightweight, breathable clothing and serious sun protection, a compact umbrella or rain shell and moisture-wicking fabrics for the humidity. Note the gap between afternoon and night: August pairs 93°F (34°C) with 80°F (26°C).
Brownsville temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.