Weather in Santiago in March

A good month. March works. It is not the peak, but nothing about it fights you. Highs average 31.6 °C, lows 16.9 °C, and rain falls on 3 days — nothing in the month is working against you.

March ranks 9 of 12 in Santiago: past the worst of the year but short of September, which is the month to book if the dates are open.

Rain falls on only 3 days, so an itinerary with no wet-weather fallback is a reasonable risk. Pack for 31.6 °C days and 16.9 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 24 days top 30 °C, making the heat continuous rather than occasional. Across the twenty years measured, the hottest March day reached 39.4 °C and the coldest night fell to 10.3 °C.

March is moderately variable: 0 mm in the driest year against 24 mm in the wettest, around an average of 10 mm. Roughly two Marchs in three land near that average, and the third does something else entirely.

Wind is light at 6.8 km/h, so the temperature on the page is close to the temperature on your skin, and the air is dry at 31% humidity, which makes the heat far more bearable than the same figure somewhere humid — and dehydrates you faster than you expect.

How March sits in the year

Temperatures hold steady either side: 33 °C in February, 31.6 here, 28 in April. Nothing about the timing within the month matters much.

Daylight in March

12.3 hours of daylight, losing 1 hours across the month. That is between Santiago's extremes of 14.3 and 9.9 hours, so days are long enough not to constrain the plan.

An inland climate

With no coast nearby, the year swings a fair way — 26.3 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage. Within March itself the daily swing is 14.7 °C, so mornings and afternoons need different clothes.

How busy it gets

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

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

March in Santiago versus nearby

If Santiago is one option among several, the nearby comparison is worth making. Córdoba is close enough to be a coin toss — 2.3 °C cooler, 7 days more rain. San Miguel de Tucumán is the weaker option in March — within a degree on temperature, 9 days more rain.

So: March is a compromise. September is 20 points better and is what Santiago is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Santiago

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