When's the best time to visit San José in 2026?

San José sits at 1,150 metres in the Central Valley, and that elevation changes everything about the weather equation. Forget the steamy coastal heat most people picture when they think of Costa Rica — mornings here start around 17°C with a sharpness that catches you off guard, and by mid-afternoon you're at a comfortable 26°C. During the dry season, December through March, the sky over the Cordillera Central stays clear until well past sunset. You can walk the length of Avenida Central from the Mercado Central to the Plaza de la Cultura without ducking under an awning once. The air smells like diesel and roasting coffee in roughly equal measure, and on still mornings the volcanic tang from Irazú drifts across the eastern suburbs. Nights get properly cool — 14°C or 15°C — and you will see Josefinos in actual jackets, which tells you something.

January and February are the sweet spot. The Festival de la Luz parade in mid-December kicks off the high season with floats running down Paseo Colón, but by early January the holiday crowds thin out and hotel rates in Barrio Amón settle back down. The Saturday Feria del Agricultor in Zapote is at its most abundant then — piles of fresh fresas for about ₡1,000 a bag, coffee cherries still coming off the surrounding slopes, and the sharp sweetness of ripe cas fruit you will not find outside Costa Rica. The Museo de los Niños, housed in the old Central Penitentiary building, is walkable without wilting, and day trips to the Poás Volcano crater are more likely to give you a clear view of the turquoise acid lake rather than a wall of cloud. That said, February afternoons can get dusty, and the city's air quality tends to dip.

The rainy season runs May through November, and it is not the disaster most guides suggest — at least not until September. May and June mornings tend to be bright and warm, with clouds building by 1pm and a hard downpour between 2pm and 4pm that clears by dinner. The city smells different after those rains: wet concrete, warm earth, the sharp green of trimmed hedgerows along Paseo de los Estudiantes. If you time your museum visits for the afternoon — the Museo de Arte y Diseño Contemporáneo in the old National Liquor Factory, or the Museo Nacional inside the Bellavista Fortress with its bullet holes still visible on the tower walls — you're sheltered during the heaviest hour and back outside by the time the pavement is steaming dry. Hotel rates in Escazú and Santa Ana drop 30–40% from their December peak, and you might have the Jade Museum nearly to yourself on a Wednesday afternoon.

September and October are the months to skip. The temporal del Pacífico sets in — days of continuous grey drizzle rather than the dramatic afternoon-and-done pattern of early green season. Streets in the southern districts flood on a regular basis, the Río Torres rises enough to close the riverside paths, and the cold damp at altitude makes the city feel plain miserable. Temperatures hover at 19–20°C under overcast skies with no sun to warm things up. The Mercado Central stays open and the gallo pinto with its smoky Lizano salsa tastes the same, but getting anywhere is slow and taxis become scarce. If your schedule locks you into these months, spend most of your time on the Caribbean coast instead — Puerto Viejo runs on a different rain calendar entirely, and its driest stretch lines up with the Central Valley's wettest.