Brownsville weather in August

In August, Brownsville sees average daytime highs of 93°F and overnight lows near 78°F, with 2.1 in of rain across 10.4 wet days and about 12.9 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 93°F through the month. The sky is clear or mostly clear about 50% of the time in August, and the air most often feels miserable.

Daylight stretches from about 13 h 12 min at the start of August to 12 h 36 min by month's end. Set against the rest of the year, August is Brownsville's 4th-clearest and 10th-windiest month. For the whole year in context, see Brownsville's year-round climate.

Daytime high
93°
1st warmest
Overnight low
78°
12th coldest
Rainfall
2.1 in
10.4 wet days
Daylight
12 h 54 min
6:07 AM – 7:02 PM
Cloud cover
46%
4th clearest
Wind
10 mph
10th windiest
Solar energy
6.34 kWh/m²
Travel score
3.2
out of 10

Brownsville is seat of Cameron County, Texas, United States.

Density
493/km²
people per km²
Founded
1849

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 93°F through the month.

A typical August day in Brownsville reaches about 93°F in the afternoon and slips back to 78°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 89°F and 96°F. Set against its neighbours, August runs on par with July and about 4°F warmer than September.

70°80°90°100°151015202531
Avg high (°F)Avg low (°F)
19378
29378
39378
49378
59378
69378
79378
89378
99378
109378
119378
129378
139378
149378
159378
169378
179378
189378
199378
209278
219278
229278
239278
249278
259278
269278
279278
289278
299277
309177
319177

How August really feels in Brownsville

Once humidity and wind are folded in, August averages 31 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
31
31 feel dangerously hot (≥ 102°F)
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Brownsville weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan71° / 55°1.35.710.67.1
Feb74° / 58°1.15.311.17.5
Mar78° / 63°1.55.711.87.4
Apr83° / 68°1.95.912.66.5
May87° / 74°1.8713.25.0
Jun91° / 77°2.310.313.63.8
Jul92° / 78°2.58.813.53.5
Aug93° / 78°2.110.412.93.2
Sep89° / 75°4.215.612.23.7
Oct84° / 69°2.89.411.45.8
Nov78° / 62°1.77.610.77.2
Dec72° / 56°1.35.910.47.3

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17228
27228
37228
47228
57228
67228
77129
87129
97030
107030
117030
127030
136931
146931
156832
166832
176733
186733
196733
206733
216733
226634
236634
246535
256436
266337
276238
286139
295941
305941
315842

Chance of precipitation in August

Any precipitation

Brownsville gets around 2.1 in of rain over 10.4 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 34% and peaks near 50% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
125
225
325
426
526
627
727
828
928
1028
1129
1229
1330
1430
1531
1632
1732
1833
1934
2035
2136
2237
2338
2440
2541
2643
2744
2846
2947
3049
3150

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the miserable band about 54% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1004654
2004654
3004654
4004555
5004555
6004456
7004456
8014356
9014356
10014257
11014257
12014158
13014158
14014158
15014158
16014257
17014257
18014356
19014356
20014455
21014554
22014554
23024652
24024751
25024751
26024850
27024849
28024949
29034948
30034948
31134947

Wind in August

Winds average 10 mph in August.

Across August, daily wind ranges from about 9 mph on the calmest days to 11 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
111light breeze
211light breeze
311light breeze
411light breeze
511light breeze
611light breeze
711light breeze
811light breeze
911light breeze
1011light breeze
1111light breeze
1211light breeze
1311light breeze
1411light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 12 min at the start of August to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over August. Sunrise moves from 5:59 AM to 6:13 AM, and sunset from 7:13 PM to 6:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.25:597:13
213.26:007:12
313.26:007:12
413.26:017:11
513.26:017:10
613.16:027:10
713.16:027:09
813.16:037:08
913.16:037:07
1013.06:047:07
1113.06:047:06
1213.06:057:05
1313.06:057:04
1413.06:067:03
1512.96:067:02
1612.96:077:02
1712.96:077:01
1812.96:077:00
1912.86:086:59
2012.86:086:58
2112.86:096:57
2212.86:096:56
2312.86:106:55
2412.76:106:54
2512.76:116:53
2612.76:116:52
2712.76:126:51
2812.66:126:50
2912.66:126:49
3012.66:136:48
3112.66:136:47

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.34 kWh/m².

For context, solar energy here swings from a low near 2.92 kWh/m² to a high of 6.72 kWh/m² in July across the year — August's 6.34 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
46.7Intense
56.6Intense
66.6Intense
76.6Intense
86.6Intense
96.6Intense
106.5Intense
116.5Intense
126.5Intense
136.5Intense
146.4Intense
156.4Intense
166.4Intense
176.3Intense
186.3Intense
196.3Intense
206.2Intense
216.2Intense
226.1Intense
236.1Intense
246.0Intense
256.0Intense
266.0Bright
275.9Bright
285.8Bright
295.8Bright
305.8Bright
315.7Bright
Planning a trip in August

Hazard calendar for Brownsville

In seasonPeak

In August, Brownsville sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Brownsville sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Brownsville?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.2
Sightseeing
12th-best month of the year
6.2
Beach & pool
8th-best month of the year

August is a weaker month for outdoor sightseeing in Brownsville. The water and warmth also suit a beach or pool day.

What to pack for Brownsville in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Brownsville sees daytime highs around 93°F and nights near 78°F. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.

light clothessun protectionrain gear

Sea temperature near Brownsville in August

The nearest coast averages about 83°F in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 23 mi away) is warmest in September at about 84°F and coldest in February near 66°F.

It's comfortable for a long swim from Mar 18 to Jan 2 — about 9.6 months when the water holds above 68°F.

70°80°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan66Cool
Feb66Cool
Mar68Cool
Apr72Refreshing
May78Warm
Jun82Warm
Jul82Tropical
Aug83Tropical
Sep84Tropical
Oct81Warm
Nov75Warm
Dec70Refreshing

UV index in Brownsville in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Brownsville peaks around June 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 5 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highExtremeVery highHighJun 21UV 12Dec 22UV 5
UV index (midday)Level
Jan5Moderate
Feb7High
Mar8Very high
Apr11Extreme
May9Very high
Jun12Extreme
Jul11Extreme
Aug11Extreme
Sep10Very high
Oct8Very high
Nov6High
Dec5Moderate

Air quality in Brownsville in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Brownsville is worst in July — around 25 µg/m³ PM2.5 (moderate), about 3.7× the cleanest month (October, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1525 µg/m³Oct 247 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar11Good
Apr13Moderate
May19Moderate
Jun20Moderate
Jul25Moderate
Aug18Moderate
Sep13Moderate
Oct7Good
Nov7Good
Dec9Good
Location & terrain

Where is Brownsville?

Brownsville sits at 25.9°N, 97.5°W, 33 ft above sea level, in United States. The nearest listed city is Heroica Matamoros, 1.9 mi away.

Topography around Brownsville

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Brownsville.

Within 2 miles, the terrain around Brownsville has only modest variations in elevation — a maximum elevation change of 49 ft around an average of 36 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 92 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 259 ft.

The land around Brownsville is covered by artificial surfaces (50%) and trees (33%) within 2 miles, cropland (28%), grassland (22%) and artificial surfaces (20%) within 10 miles, and cropland (37%) and water (34%) within 50 miles.

2 miles
49 ft
10 miles
92 ft
50 miles
259 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Heroica Matamoros 1.9 mi · San Benito 18 mi · Harlingen 24 mi · Valle Hermoso 25 mi · Mercedes 31 mi · Weslaco 35 mi · Ciudad Río Bravo 37 mi · Donna 39 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Brownsville (25.9017°, -97.4975°, elevation 33 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).