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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 Tunnel Light Marathon

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

Weather Averages for Last 12 Years

Race day snapshot

Mostly Cloudy

Most common race morning weather across the last 12 years.

Start Line Conditions

Start Temp 55°F 13°C

Start Humidity 79% Humidity

Wind W 3 mph

Race day high 68°F 20°C

Race day low 53°F 12°C

PR Score 103.32 Weather-influenced race day scoring

Course Score 104.63 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

Rain, Overcast

Start Line Conditions

Start Temp 45°F 7°C

Start Humidity 96% Humidity

Wind WSW 5 mph Wind

Race day high 50°F 10°C

Race day low 46°F 8°C

PR Score 104.78 Normal score 100.30

Course Score 104.88 Course-only Score

Boston Qualifying Cut-off Time Prediction Contest