Weather in San José in March

Prime time. If you get to pick your dates, March is the one. Highs average 27.9 °C, lows 17.2 °C, and rain falls on 7 days — nothing in the month is working against you.

March ranks 2 of 12 in San José. Only February scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 7 days, 0 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

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest March day reached 31.1 °C and the coldest night fell to 13.9 °C.

March is moderately variable: 7 mm in the driest year against 67 mm in the wettest, around an average of 29 mm. Roughly two Marchs in three land near that average, and the third does something else entirely.

Wind is light at 2.8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 64%.

How March sits in the year

Temperatures hold steady either side: 26 °C in February, 27.9 here, 28 in April. Nothing about the timing within the month matters much. Rain is the thing that moves: April brings 6 days more of it, so the earlier half of a flexible trip is the safer half.

Daylight in March

San José sits close enough to the equator that daylight barely moves all year — 12.1 hours in March, against a range of just 1.2 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

An inland climate

Despite being inland, the year stays fairly even: 12 °C between the year's warmest afternoons and coldest nights. At 1133 m the air is thin enough to matter — sun that burns faster than the temperature suggests, and nights that cool off quickly.

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 San José versus nearby

If San José is one option among several, the nearby comparison is worth making. San Isidro is the weaker option in March — within a degree on temperature, 7 days more rain. Puntarenas is the weaker option in March — 7.5 °C warmer, 5 days less rain.

So: March is effectively as good as it gets here — 4 points behind February, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in San José

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