Thời tiết San José, Costa Rica vào tháng 12

Regulars are specific this area reads as genuinely drier than areas further south along the same coast, where the rainy season doesn't properly end until mid-to-late December, though conditions here have shifted from the old reputation of reliably rain-free North winds - even the tail end of the month can now bring real rain some years. Our row backs that hot, genuinely wet read, 27.6C reading as a scorching 33C, over 24C nights feeling 29C, with a substantial 278.6mm of rain across 28.5 days and humidity at 86 percent. Regulars are consistent Costa Rica's weather is genuinely location-dependent given how many separate weather systems affect the country, no single verdict applying evenly countrywide. The sea sits at a bath-warm 29.1C. The record: 9.9 hours of sun, a 9.7 kph wind and AQI 32.

Forum posters generally rate August as a good month to visit Costa Rica overall, describing a typical lowland or coastal day as sunny and hot in the morning with rain, sometimes heavy, moving in during the afternoon or evening - a pattern posters say leaves the landscape noticeably greener. San Jose itself, at over 1,100m elevation, runs noticeably milder than those hotter coastal descriptions, with comfortable daytime highs rather than genuine heat. Posters are direct that late August specifically can turn genuinely rainy, and while Pacific-slope rain is usually confined to afternoon and evening, posters emphasize there's no guarantee during rainy season. One visitor's second-half-of-August trip found mostly good weather, though posters are consistent that predicting exact conditions for specific dates isn't really possible. Posters generally rate August as workable and even good for a San José-area visit, rain gear recommended regardless.

February is deep in Costa Rica's dry season, and San José sits at altitude, so it runs cooler than the coasts — near 26°C by day, dropping to 17 at night. "Dry season" is the forum's own phrase and their own caveat: it does not mean it cannot rain, and eight wet days is the record's answer. Regulars pack an umbrella regardless. Two regional notes matter more than the capital's own weather: the Caribbean side is reliably rainier and cloudier than the Pacific in February, and Guanacaste gets serious wind this month while La Fortuna, Monteverde and Manuel Antonio generally do not.