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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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Historical weather

Historical Race Day Weather for the Colfax Marathon

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

Weather Averages for Last 15 Years

Race day snapshot

Partly Cloudy

Most common race morning weather across the last 15 years.

Start Line Conditions

Start Temp 46°F 8°C

Start Humidity 73% Humidity

Wind SSW 5 mph

Race day high 70°F 21°C

Race day low 44°F 7°C

PR Score 92.8 Weather-influenced race day scoring

Course Score 92.86 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.

May 17, 2026

Race day snapshot

Partially cloudy

Start Line Conditions

Start Temp 52°F 11°C

Start Humidity 63% Humidity

Wind N 7 mph Wind

Race day high 67°F 19°C

Race day low 51°F 11°C

PR Score 92.77 Normal score 92.77

Course Score 92.77 Course-only Score

Boston Qualifying Cut-off Time Prediction Contest