Weather in San José in April

A good month. April works. It is not the peak, but nothing about it fights you. Highs average 28 °C, lows 18 °C, and rain falls on 13 days — nothing in the month is working against you.

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

Rain on 13 days, 2 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 April day reached 31.6 °C and the coldest night fell to 14.4 °C, and the wettest single day dropped 52 mm — roughly 68% of the month's rain in one day.

April is moderately variable: 21 mm in the driest year against 176 mm in the wettest, around an average of 77 mm. Roughly two Aprils in three land near that average, and the third does something else entirely.

Wind is light at 2.4 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 68%.

How April sits in the year

Temperatures hold steady either side: 27.9 °C in March, 28 here, 25.7 in May. Nothing about the timing within the month matters much. Rain is the thing that moves: May brings 11 days more of it, so the earlier half of a flexible trip is the safer half.

Daylight in April

San José sits close enough to the equator that daylight barely moves all year — 12.3 hours in April, 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

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.

April 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 April — within a degree on temperature, 4 days more rain. Puntarenas is the weaker option in April — 7.2 °C warmer, 4 days less rain.

So: April works, with February the better month by 17 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in San José

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