San José month by month
Plan your visit to San José by month. Compare weather, crowds, events, and prices across all twelve months with historical climate data.
San José's year splits on rainfall, not temperature. Highs hold between 24°C and 27°C across all 12 months. February is the driest at 5 rain days and 26°C. January has 6 rain days, December 10. March and April both reach 27°C, but March records 9 rain days and April 15. By May the count reaches 25. June, September, and October each hit 29 rain days. July falls to 24 before August rises to 27.
TTDI publishes 12 month guides for San José beneath this index. Start with February for the driest window or March for the warmest highs. If your trip falls between May and November, open July. Its 24 rain days at 25°C sit below the 29 that June, September, and October each record.
June, September, and October each reach 29 rain days at highs of 24°C to 25°C. Those are the 3 wettest months in San José's measured year.
February is San José's decisive month, recording the year's lowest rain-day count at 5 with a 26°C high.
- January
- High
- 25°C
- Low
- 16°C
- Rain
- 30 mm
January is San José's sweet spot: the heart of the Central Valley's dry season, when mornings break clear and cool at around 16°C (60°F) and afternoons warm to a comfortable 25°C…
- February
- High
- 26°C
- Low
- 16°C
- Rain
- 17 mm
February is the driest month of the year in San José, and that single fact shapes nearly everything about visiting right now. The city sits at roughly 1,100 meters in Costa Rica's…
- March
- High
- 27°C
- Low
- 16°C
- Rain
- 52 mm
March in San José is the last gasp of the dry season, and honestly, that's the single most useful thing to know. You're getting warm days around 27°C (81°F) that cool to a…
- April
- High
- 27°C
- Low
- 17°C
- Rain
- 145 mm
April in San José sits right on the fault line between dry season and green season, and you can feel the shift. The first couple of weeks still carry the warmth and clarity of…
- May
- High
- 26°C
- Low
- 17°C
- Rain
- 317 mm
May in San José means one thing above all else: the rains have properly arrived. After months of dry-season sunshine, the Central Valley shifts gears with a forcefulness that tends…
- June
- High
- 24°C
- Low
- 17°C
- Rain
- 458 mm
June in San José is wet. There's really no way around it: you're looking at roughly 458mm of rain spread across 29 days of the month, which means it rains almost every single day.…
- July
- High
- 25°C
- Low
- 17°C
- Rain
- 354 mm
July in San José means rain. There's really no way around it: you're looking at roughly 354mm of rainfall spread across about 24 days of the month, which puts July squarely in the…
- August
- High
- 25°C
- Low
- 16°C
- Rain
- 452 mm
August in San José lands right in the thick of the green season, and there's no gentle way to put it: this is one of the wettest months of the year. Expect rain on roughly 27 out…
- September
- High
- 25°C
- Low
- 16°C
- Rain
- 456 mm
September in San José means rain. That's the single most important thing to know. You're walking into the deep end of Costa Rica's green season, with roughly 456mm of rainfall…
- October
- High
- 24°C
- Low
- 16°C
- Rain
- 546 mm
October in San José is, to put it plainly, the wettest month of the year. You're looking at roughly 546mm of rain spread across 29 out of 31 days, which means it rains nearly every…
- November
- High
- 24°C
- Low
- 16°C
- Rain
- 355 mm
November in San José means rain. There's no getting around it: expect downpours on roughly 24 out of 30 days, with 355mm of rainfall that turns the capital's streets into temporary…
- December
- High
- 25°C
- Low
- 16°C
- Rain
- 72 mm
December in San José marks the arrival of the dry season, and honestly, the city feels like it exhales after months of afternoon downpours. The rains that dump 355mm on the Central…