San José Marathon Costa Rica
Race Day Weather
Warming up, adjust pace accordingly
Runners will face temperatures rising from 62°F at the start to 72°F towards the finish, with humidity averaging 78%. Light winds from the NE may be present but should not significantly impact performance. As the race progresses, competitors should pace conservatively early on and increase hydration frequency to combat the rising temperatures in the later laps.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for San José Marathon Costa Rica
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Get your personalized San José Marathon Costa Rica race plan
A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.
Race Info
The San José Marathon Costa Rica is an AIMS-certified road race held every December in Costa Rica's capital. The marathon covers four laps of a certified urban circuit starting and finishing at Estadio Nacional in La Sabana Park, with the half marathon running the same loop twice and the 10K on its own course. The Asociación Marathon Internacional Costa Rica has organized the race since founding it in 1993, and the December 2026 edition is its 30th running.
