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Historical weather

Historical Race Day Weather for the Potomac River Run Marathon (October)

See historical race day weather for the Potomac River Run Marathon (October), including start temperature, humidity, wind, race day temperatures, PR score, and course score.

Weather Averages for Last 14 Years

Race day snapshot
Partly Cloudy
Partly Cloudy
Most common race morning weather across the last 14 years.
Start Line Conditions
Start Temp 51°F 11°C
Start Humidity 76% Humidity
Wind N 6 mph
Race day high 64°F 18°C
Race day low 45°F 7°C
PR Score 98.59 Weather-influenced race day scoring
Course Score 99.35 Course-only Score

Race Day Weather by Year

Most recent years appear first so you can quickly compare start conditions, temperatures, wind, and scores across different editions of the race.

October 17, 2026

Race day snapshot
Rain, Overcast
Start Line Conditions
Start Temp 55°F 13°C
Start Humidity 80% Humidity
Wind N 10 mph Wind
Race day high 63°F 17°C
Race day low 44°F 7°C
PR Score 99.53 Normal score 97.41
Course Score 99.53 Course-only Score
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Course-adjusted pacing

Want to run your best Potomac River Run Marathon (October)?

Potomac River Run Marathon (October) Pace Bands are adjusted for the specific terrain of the course, your goal time, and pacing strategy.

Build your Potomac River Run Marathon (October) pace band

Easy to useCourse-aware pacing, goal-time based splits, and a cleaner race day plan.See all pace bands