Weather in Brownsville in March

Prime time. March is about as good as Brownsville gets. Highs average 27.5 °C, lows 17.1 °C, and rain falls on 4 days — nothing in the month is working against you.

March ranks 5 of 12 in Brownsville: past the worst of the year but short of February, which is the month to book if the dates are open.

Rain falls on only 4 days, so an itinerary with no wet-weather fallback is a reasonable risk. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: 7 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest March day reached 38.3 °C and the coldest night fell to 4.4 °C, and the wettest single day dropped 38 mm — roughly 127% of the month's rain in one day.

This is the volatile part. March rainfall has ranged from 1 mm to 89 mm across the twenty years measured — a 88 mm spread around an average of 30 mm. The average is real but almost no individual March looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind is light at 14.9 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 72%.

How March sits in the year

The month is on the way up: 3 °C warmer than February, and April adds another 3.2 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in March

12 hours of daylight, gaining 0.8 hours across the month. That is between Brownsville's extremes of 13.7 and 10.5 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 21.9 °C in March — comfortable for a proper swim. The sea peaks at 29.4 °C in August and bottoms out at 21.4 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

March in Brownsville versus nearby

If Brownsville is one option among several, the nearby comparison is worth making. Corpus Christi is close enough to be a coin toss — 2 °C cooler, 2 days more rain. Laredo is close enough to be a coin toss — within a degree on temperature, 1 day more rain.

So: March is effectively as good as it gets here — 2 points behind February, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Brownsville

See all twelve months in Brownsville, or where else to go in March.