Cannonball Marathon
Race Day Weather
Cool, rainy, breezy conditions
Runners will face cool temperatures starting at 54°F and ranging from 52°F to 55°F throughout the race. With a light rain expected and humidity at 87%, conditions will feel damp, and the wind will be moderate at 17 mph from the SE, impacting runners with a mix of headwinds and crosswinds. Runners should dress appropriately for the rain and adjust their pace conservatively to maintain energy on the rolling course.
Pace Calculator
Get forecast alerts for Cannonball Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The Cannonball Marathon is an annual marathon, half marathon, 10K, and 5K held in Greensboro, North Carolina, one of the longest-running road races in the state. The marathon and half marathon share a course starting and finishing at Jaycee Park within Country Park, following the Atlantic & Yadkin Greenway through north Greensboro; marathon runners complete two loops. The marathon is a Boston Marathon qualifier. Proceeds from the race support the adjacent Greensboro Science Center. Source