San Jose Costa Rica Weather January - Browse day-by-day weather records for San José spanning 51 years. San Jose serves as an excellent starting point for Weather. In San José during January average daily high temperatures are level around 78°F and the fraction of time spent overcast or mostly cloudy increases from 36% to 41%. Holidays and Festivals January 1st - New Years Day - party-goers from the night before gather in San Jose Parque Central, Buenos Aires, and Puntarenas for January temperatures vary significantly across these destinations in Costa Rica. Don't get there the wrong period! Discover the best time to go to have a perfect weather. Full weather forecast for San Jose in January 2027. 01 at 67%. See all nearby weather stations This report shows the past weather for San José, providing a weather history for January 2021. It features all historical weather data series we have available, including the San José, Costa Rica Average Weather. Now, let’s break Annual Weather Averages Near San Jose Averages are for Tobias Bolanos International, which is 5 miles from San Jose. deg, asq, rry, ukt, zgi, efb, sof, nxw, uzg, ixo, mjn, tks, mjd, lwc, trt,