Brownsville, Texas climate: Normal weather by month, frost dates and records
Brownsville's normal year runs from 53°F January nights to 96°F August afternoons, with 26.8 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 24.6°C, January lows of 12°C, August highs of 36°C, 680 mm of precipitation a year.
- NOAA stationBrownsville S Padre Island International Airport
- Station IDUSW00012919
- Location25.92°N 97.42°W
- Elevation23 ft (7 m)
- From the center6 miles
- Population191,967
On October 23, the normal high in Brownsville is 86°F and the normal low 67°F, and the chance of measurable rain or snow is 24%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Brownsville.
- Jan 73° 53°
- Feb 76° 57°
- Mar 81° 62°
- Apr 86° 68°
- May 90° 74°
- Jun 94° 77°
- Jul 95° 78°
- Aug 96° 78°
- Sep 92° 75°
- Oct 87° 69°
- Nov 80° 61°
- Dec 74° 55°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Brownsville each month?
August is the warmest month, with normal highs of 96°F; January the coldest, with normal lows of 53°F. The most precipitation falls in September (5.73 in), the least in February (1.03 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 73°F | 53°F | 62.8°F | 1.08 | 7 | <1 | 1 | 10 h 40 min |
| February | 76°F | 57°F | 66.5°F | 1.03 | 5 | <1 | <1 | 11 h 20 min |
| March | 81°F | 62°F | 71.3°F | 1.45 | 5 | 1 | <1 | 12 h |
| April | 86°F | 68°F | 76.7°F | 1.47 | 5 | 5 | <1 | 12 h 40 min |
| May | 90°F | 74°F | 82.0°F | 2.22 | 5 | 16 | <1 | 13 h 20 min |
| June | 94°F | 77°F | 85.6°F | 2.86 | 6 | 27 | <1 | 13 h 50 min |
| July | 95°F | 78°F | 86.4°F | 1.98 | 5 | 29 | <1 | 13 h 40 min |
| August | 96°F | 78°F | 87.0°F | 2.16 | 6 | 30 | <1 | 13 h |
| September | 92°F | 75°F | 83.4°F | 5.73 | 11 | 22 | <1 | 12 h 20 min |
| October | 87°F | 69°F | 77.9°F | 3.83 | 8 | 9 | <1 | 11 h 40 min |
| November | 80°F | 61°F | 70.5°F | 1.76 | 7 | 1 | <1 | 10 h 50 min |
| December | 74°F | 55°F | 64.4°F | 1.21 | 8 | <1 | <1 | 10 h 30 min |
| Year (annual) | 85°F | 67°F | 76.2°F | 26.78 | 77 | 141 | 1 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 23°C | 12°C | 17.1°C | 27 mm |
| February | 25°C | 14°C | 19.2°C | 26 mm |
| March | 27°C | 17°C | 21.8°C | 37 mm |
| April | 30°C | 20°C | 24.8°C | 37 mm |
| May | 32°C | 23°C | 27.8°C | 56 mm |
| June | 34°C | 25°C | 29.8°C | 73 mm |
| July | 35°C | 25°C | 30.2°C | 50 mm |
| August | 36°C | 25°C | 30.6°C | 55 mm |
| September | 33°C | 24°C | 28.6°C | 146 mm |
| October | 31°C | 20°C | 25.5°C | 97 mm |
| November | 27°C | 16°C | 21.4°C | 45 mm |
| December | 23°C | 13°C | 18.0°C | 31 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00012919; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Brownsville?
Normal highs sit between 65°F and 85°F in January, February, March, November and December. Of those, February has the fewest days with rain (5).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00012919.
When is the last frost in Brownsville?
A night at 32°F or colder comes in only 26% of years in Brownsville (NOAA). NOAA's median date of the last spring frost is January 6 and of the first autumn frost January 2.
NOAA puts the median frost-free season at 365 days, and the season without a hard freeze (28°F) at 365 days.
The USDA's 2023 Plant Hardiness Zone Map puts Brownsville in zone 10a across its 6 ZIP code areas (10a in 78526, the largest). By the map's own method, the average of each year's coldest night over 1991-2020, Brownsville's NOAA station is in zone 10a: the coldest night of a typical year reaches 34°F (30 complete years).
Frost dates for every NOAA station in Texas · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00012919; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
What hardiness zone is each Brownsville ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. Brownsville's 6 ZIP code areas are all in zone 10a. Each ZIP's frost dates are in the frost tool.
Source: USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; ZIP areas in the place: Census Bureau 2020 ZCTA-to-place relationship file. A ZIP area counts when at least a tenth of its land (and 0.5 km²) lies in the place.
How hot and how cold does it get in Brownsville?
In a normal year in Brownsville, 141 days a year reach 90°F (2 of them 100°F or more), 1 night falls to 32°F or colder and 77 days bring measurable precipitation.
- Days at 90°F or more
- 141a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 1a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 77a normal year
The highest temperature in Brownsville's official record (kept by the National Weather Service since 1878) is 106°F, on March 27, 1984; the lowest is 12°F, on February 13, 1899.
The wettest calendar year on that record is 1886, with 60.06 in; the snowiest season is 2004–05, with 1.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00012919; records: ACIS (NOAA Regional Climate Centers), NWS threaded record BROthr. Records use complete months only; a month missing more than three days is left out.
How humid and windy is Brownsville, and how clear are its skies?
The summer (June-August) dew point averages 75°F. The muggiest month is June, with an average dew point of 75°F, above the 65°F at which most people call the air sticky; the driest air comes in December (53°F). April is the windiest month (12.7 mph on average), and July has the most clear or nearly clear hours (81%).
| Month | Dew point | Humidity | Afternoon humidity | Wind | Clear or few clouds | Overcast |
|---|---|---|---|---|---|---|
| January | 54°F | 77% | 57% | 10.1 mph | 47% | 37% |
| February | 58°F | 75% | 54% | 11.6 mph | 49% | 33% |
| March | 64°F | 76% | 58% | 12.2 mph | 45% | 32% |
| April | 68°F | 75% | 56% | 12.7 mph | 50% | 24% |
| May | 73°F | 76% | 58% | 11.2 mph | 65% | 7% |
| June | 75°F | 76% | 58% | 10.8 mph | 72% | 5% |
| July | 75°F | 74% | 53% | 10.2 mph | 81% | 1% |
| August | 74°F | 76% | 56% | 7.7 mph | 78% | 3% |
| September | 70°F | 77% | 58% | 7.7 mph | 73% | 8% |
| October | 63°F | 75% | 56% | 9.0 mph | 63% | 19% |
| November | 58°F | 76% | 57% | 9.2 mph | 53% | 26% |
| December | 53°F | 77% | 59% | 9.6 mph | 45% | 41% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00012919. Monthly averages of all hours; afternoon humidity at 3 p.m. local standard time; sky as the share of hours NOAA's observations rate clear or few clouds (a dash where NOAA publishes no sky value).
How sunny is Brownsville?
Over a year 81% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Brownsville, 5.0 kWh per square metre a day. August is the sunniest month (89%) and January the cloudiest (70%). Among the 459 U.S. places of 50,000 or more, that ranks tied 111th (with 13 others) in sunshine.
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 3.2 |
| February | 72% | 3.9 |
| March | 74% | 4.8 |
| April | 79% | 5.5 |
| May | 85% | 6.2 |
| June | 87% | 6.7 |
| July | 87% | 6.5 |
| August | 89% | 6.3 |
| September | 82% | 5.3 |
| October | 84% | 4.7 |
| November | 77% | 3.6 |
| December | 70% | 3.0 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Brownsville need?
A normal year in Brownsville brings 423 heating degree days, 92% fewer than the median U.S. place (5,373), and 4,542 cooling degree days, 5.0 times the median (908). No month reaches 300 heating degree days. For gardens and crops, NOAA counts 9,619 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 143 | 76 |
| February | 76 | 119 |
| March | 29 | 225 |
| April | 5 | 356 |
| May | 0 | 527 |
| June | 0 | 618 |
| July | 0 | 664 |
| August | 0 | 683 |
| September | 0 | 554 |
| October | 5 | 406 |
| November | 43 | 210 |
| December | 123 | 106 |
| Year (annual) | 423 | 4,542 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00012919. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Brownsville been warmer than normal lately?
2025 averaged 77.9°F, 1.7°F above the 1991-2020 normal of 76.2°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 76.3°F | +0.1°F | 39.60 |
| 2022 | 75.6°F | −0.6°F | 28.51 |
| 2023 | 77.6°F | +1.4°F | 22.23 |
| 2024 | 78.4°F | +2.2°F | 41.76 |
| 2025 | 77.9°F | +1.7°F | 34.87 |
Over 79 complete years from 1947 to 2025, the station's annual mean temperature rose at a fitted 3.7°F per century (+0.20°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USW00012919; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Brownsville's climate compare?
Brownsville is warmer than 319 of the other 320 places with their own NOAA record in Texas, and wetter than 126. Across the 7,247 U.S. stations with normals, its annual mean of 76.2°F is warmer than 99%.
In the Köppen classification computed from these normals, Brownsville is Cfa: temperate, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Brownsville share this climate record?
7 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Cameron Park, TX6,180 people · 5 mi NW
- Rancho Viejo, TX2,863 people · 12 mi NW
- Olmito, TX1,013 people · 11 mi NW
- South Point, TX809 people · 4 mi SE
- Reid Hope King, TX755 people · 0 mi NE
- Villa Pancho, TX431 people · 2 mi S
- San Pedro, TX398 people · 11 mi NW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Brownsville's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Brownsville. This page uses Brownsville S Padre Island International Airport; the other differs by site and elevation:
| Station | From the center | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Weather Office Brownsville USC00419649 | 6 mi S | 15 ft | 74.3°F | 51°F | 92°F | – | – | January 9 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Brownsville's climate
What is the coldest month in Brownsville?
January, with a normal high of 73°F and a normal low of 53°F. The warmest is August (96°F by day, 78°F at night).
Does it snow in Brownsville?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Brownsville?
September, with 5.73 in of precipitation in a normal year; the driest is February with 1.03 in.
What plant hardiness zone is Brownsville in?
The USDA's 2023 map puts Brownsville in zone 10a across its 6 ZIP code areas (10a in 78526, the largest). By the same method at Brownsville's NOAA station, the coldest night of a typical year reaches 34°F (30 years, 1991-2020): zone 10a.
Nearby and next
- Brownsville in OctoberThis month day by day, its records and recent years
- Texas climateThe statewide normals and every place in the state
- Port Isabel, TX18 miles from this station, 74.8°F a year
- South Padre Island, TX23 miles from this station, 74.7°F a year
- Harlingen, TX26 miles from this station, 74.9°F a year
- Santa Rosa, TX37 miles from this station, 74.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made