Brownsville, Texas Weather
Thunder quiets the land. Day 93 of summer. Read this microseason across nine climate regions →
Brownsville weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 9:21 AM CDT · Open-Meteo
- TodaySep 21Clear later——96°79°—
- TuesdaySep 22Clear14%—94°77°-2°
- WednesdaySep 23Light Drizzle29%—94°78°0°
- ThursdaySep 24Overcast40%—94°80°0°
- FridaySep 25Heavy Drizzle33%—94°80°0°
- SaturdaySep 26Overcast34%—96°80°+2°
- SundaySep 27Light Drizzle31%—93°81°-3°
Air quality now AQI 37 · Good
AQI 37 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 5.9 µg/m³ (AQI 33) with a 0.65 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in stagnant air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 5.9 µg/m³ (AQI 33) with a 0.65 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.65
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:30 PM
- Moonset
- 2:30 AM
- In sign
- ♑︎ Capricorn
Thunder quiets the land
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Brownsville at a glance
- Today vs. normal: Today averages 88°F (high 96°F, low 79°F), 6°F above the 82°F normal for Sep 21
- Last frost: None in most years — 32°F in 31% of 1991–2020 years (NOAA station 10 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant lettuce, peas, spinach, tomatoes, peppers, beans, squash; harvest summer squash, winter squash
16-Day Forecast — Brownsville
- Mon96°79°6%
- Tue94°77°14%
- Wed94°78°29%
- Thu94°80°40%
- Fri94°80°33%
- Sat96°80°34%
- Sun93°81°31%
- Mon92°79°18%
- Tue93°81°25%
- Wed90°78°32%
- Thu87°79°18%
- Fri90°76°41%
- Sat92°75°40%
- Sun96°78°40%
- Mon84°74°29%
- Tue86°71°23%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Brownsville
Interactive wind and temperature map centered on Brownsville — it loads in your browser. Open the full weather map.
Right now in the garden
Year-round growing
As of September 21, sowing here runs through the year. Freezes are uncommon, so there is no frost date to plan around; heat and rainfall set the calendar instead. This city's planting calendar for September: plant lettuce, peas, spinach, tomatoes, peppers, beans, and squash; harvest summer squash and winter squash.
SPC Convective Outlook
Storm Prediction Center — Brownsville
SPC includes Brownsville in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook.
Sun & seasons in Brownsville
Brownsville sits in Cameron County, where the year’s longest day runs 13h 46m of daylight and its shortest just 10h 31m — a swing of +3h 15m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Houston, the state’s largest city, lies about 291 miles to the NNE. The nearest town Brownsville tracks is McAllen, roughly 51 miles to the WNW.
Air quality in Brownsville
Air quality in Brownsville’s county has trended dirtier since 2020; its cleanest year on record was 2022 (median AQI 48). See the full air-quality history for Brownsville.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| February | lettuce, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| March | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| April | squash | tomatoes, peppers, beans, summer squash, winter squash |
| May | squash | tomatoes, peppers, beans, summer squash, winter squash |
| June | peppers, squash | tomatoes, peppers, summer squash, winter squash |
| July | tomatoes, peppers, squash | summer squash, winter squash |
| August | lettuce, peas, tomatoes, peppers, beans, squash | summer squash, winter squash |
| September | lettuce, peas, spinach, tomatoes, peppers, beans, squash | summer squash, winter squash |
| October | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | beans, summer squash, winter squash |
| November | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| December | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
A year in weather
August is Brownsville's warmest stretch (~87°F) and January its coldest (~63°F); precipitation crests in September at 5.7 inches and ebbs in February to 1.0 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 63° | 1.1″ | 2 |
| February | 67° | 1.0″ | 2 |
| March | 71° | 1.4″ | 2 |
| April | 77° | 1.5″ | 2 |
| May | 82° | 2.2″ | 2 |
| June | 86° | 2.9″ | 4 |
| July | 86° | 2.0″ | 3 |
| August | 87° | 2.2″ | 4 |
| September | 83° | 5.7″ | 8 |
| October | 78° | 3.8″ | 5 |
| November | 71° | 1.8″ | 3 |
| December | 64° | 1.2″ | 3 |
Regional context
Similar climates Cameron Park, TX, Del Mar Heights, TX, Olmito, TX
By the nearest station's NOAA NCEI 1991-2020 normals, Brownsville sees 63°F Januarys and 86°F Julys, a 24°F range, plus around 26.8 inches of precipitation across 39 days.
Summer convection drives Brownsville's precipitation: September logs 5.7 inches on 7.6 rainy days, against February's 1.0 inches on 1.9 — warm-season storms carry Brownsville's moisture. That puts Brownsville in a summer-convective cohort with places like Cameron Park, TX, Del Mar Heights, TX and Olmito, TX.
Brownsville rarely sees a hard freeze — its coldest month sits near 63°F — so planting spans most of the calendar. Heat peaks in August around 87°F, which confines cool-season crops to the shoulders of summer. Brownsville's rare cold nights chill open ground first.
Similar climates: Cameron Park, TX, Del Mar Heights, TX, Olmito, TX, Orason, TX, Chula Vista, TX.
Frequently asked
- When does it freeze in Brownsville?
- Most years Brownsville doesn't freeze: the nearest NOAA station reached 32°F in 31% of 1991–2020 years, so Brownsville has no reliable frost date.
- What is the rainy season in Brownsville?
- Brownsville sees its heaviest rain in September (around 5.7 inches), part of roughly 27 inches a year.
- What is the warmest month in Brownsville?
- Brownsville peaks in August, when the mean runs near 87°F.
- What is the coldest month in Brownsville?
- January is Brownsville's coldest month, averaging about 63°F.
- When can I start a vegetable garden in Brownsville?
- Start whenever suits in Brownsville — freezes are too rare for a frost date — and save lettuce and peas for Brownsville's coolest stretch, near 63°F.
- How many rainy days does Brownsville get?
- Brownsville records around 39 days of measurable precipitation annually.
- What hardiness zone is Brownsville?
- Because Brownsville bottoms near 63°F in January, that winter low sets Brownsville's USDA zone — verify by ZIP.
- What is the 10-day forecast for Brownsville?
- Brownsville's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Brownsville?
- See this week's day-by-day rain chances for Brownsville in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Brownsville?
- Current conditions for Brownsville and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Brownsville forecast updated?
- The Brownsville forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Brownsville?
- Today's sunrise and sunset times for Brownsville are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Brownsville?
- The next few days in Brownsville's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Brownsville sits at 26.0°N; its climate zone is humid subtropical (Köppen approximation).
ZIP codes in Brownsville
- 78520
- 78521
- 78522
- 78526
- 78566
- 78575
- 78578