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Boston Cut-off Time Prediction Contest

Predict the 2027 Boston Cut-off Time and win a great prize and bragging rights among all your running friends.

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Best Boston Marathon Qualifiers

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Historical weather

Historical Race Day Weather for the Boston or Bust Marathon

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

Weather Averages for Last 5 Years

Race day snapshot

Clear

Most common race morning weather across the last 5 years.

Start Line Conditions

Start Temp 63°F 17°C

Start Humidity 89% Humidity

Wind N 3 mph

Race day high 82°F 28°C

Race day low 63°F 17°C

PR Score 94.63 Weather-influenced race day scoring

Course Score 99.45 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 13, 2026

Race day snapshot

Partially cloudy

Start Line Conditions

Start Temp 69°F 21°C

Start Humidity 99% Humidity

Wind N 3 mph Wind

Race day high 91°F 33°C

Race day low 68°F 20°C

PR Score 91.11 Normal score 95.15