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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 San Francisco Marathon

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

Weather Averages for Last 16 Years

Race day snapshot

Overcast

Most common race morning weather across the last 16 years.

Start Line Conditions

Start Temp 57°F 14°C

Start Humidity 86% Humidity

Wind SW 6 mph

Race day high 67°F 19°C

Race day low 56°F 13°C

PR Score 96.04 Weather-influenced race day scoring

Course Score 97.24 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.

July 26, 2026

Race day snapshot

Partially cloudy

Start Line Conditions

Start Temp 58°F 14°C

Start Humidity 91% Humidity

Wind WSW 9 mph Wind

Race day high 65°F 18°C

Race day low 58°F 14°C

PR Score 94.80 Normal score 95.73

Course Score 96.58 Course-only Score

Boston Qualifying Cut-off Time Prediction Contest