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Boston Cut-off Time Prediction Contest

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Historical weather

Historical Race Day Weather for the Bound for Boston Marathon

See historical race day weather for the Bound for Boston Marathon, including start temperature, humidity, wind, race day temperatures, PR score, and course score.

Weather Averages for Last 6 Years

Race day snapshot

Clear

Most common race morning weather across the last 6 years.

Start Line Conditions

Start Temp 67°F 19°C

Start Humidity 94% Humidity

Wind N 2 mph

Race day high 86°F 30°C

Race day low 67°F 19°C

PR Score 93.46 Weather-influenced race day scoring

Course Score 98.85 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.

September 6, 2026

Race day snapshot

Clear

Start Line Conditions

Start Temp 73°F 23°C

Start Humidity 94% Humidity

Wind No Wind Wind

Race day high 95°F 35°C

Race day low 73°F 23°C

PR Score 91.66 Normal score 94.25