Weather in Buenos Aires in March

Prime time. If you get to pick your dates, March is the one. Highs average 24.5 °C, lows 19.3 °C, and rain falls on 9 days — nothing in the month is working against you.

Buenos Aires barely has seasons. March scores 80 out of 100 against a best of 83 in April — a gap small enough that the month you choose matters far less here than the week you choose.

Rain on 9 days, 4 of them heavy. Enough to need a plan B, not enough to need a plan around it. 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: it never really gets hot: not one day in an average March reaches 30 °C; the day barely swings — 5.2 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest March day reached 31.6 °C and the coldest night fell to 12.2 °C, and the wettest single day dropped 71 mm — roughly 58% of the month's rain in one day.

March is moderately variable: 31 mm in the driest year against 366 mm in the wettest, around an average of 123 mm. Roughly two Marchs in three land near that average, and the third does something else entirely.

Wind sits around 16.5 km/h — a steady breeze rather than a nuisance, and welcome on the warmer days, and humidity is unremarkable at 74%.

How March sits in the year

The month is on the way down: 2.1 °C cooler than February, with April dropping another 3.4 °C. The first week and the last are not the same trip.

Daylight in March

12.4 hours of daylight, losing 1.1 hours across the month. That is between Buenos Aires's extremes of 14.5 and 9.8 hours, so days are long enough not to constrain the plan.

An inland climate

Despite being inland, the year stays fairly even: 18.9 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Busy. Popular without being frantic; book the things you care about, improvise the rest.

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

March in Buenos Aires versus nearby

If Buenos Aires is one option among several, the nearby comparison is worth making. Rosario is close enough to be a coin toss — 3.8 °C warmer, 1 day more rain. Mar del Plata is close enough to be a coin toss — 2.4 °C cooler, 3 days more rain.

So: March is effectively as good as it gets here — 3 points behind April, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Buenos Aires

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