ZombieRunner Halloween Marathon
San Jose, CA, USA · October 31, 2026
Race Day Weather
56°at start
71° high
Breezy
Dry
Cool start, warming trend
Runners will face a temperature increase from 56°F at the start to 71°F by the finish, with average humidity at 51% and a dew point of 45°F. Winds will be mild, coming from the SW at 9 mph, with gusts up to 22 mph. As temperatures rise, runners should consider adjusting their pace in the latter stages to maintain energy.
Race day forecast available in 184 days
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