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Historical weather

Historical Race Day Weather for the Charles River Marathon Invitational

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

Weather Averages for Last 2 Years

Race day snapshot

Overcast

Most common race morning weather across the last 2 years.

Start Line Conditions

Start Temp 64°F 18°C

Start Humidity 93% Humidity

Wind SE 3 mph

Race day high 69°F 21°C

Race day low 62°F 17°C

PR Score 95.51 Weather-influenced race day scoring

Course Score 99.55 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

Overcast

Start Line Conditions

Start Temp 65°F 18°C

Start Humidity 85% Humidity

Wind SE 0 mph Wind

Race day high 70°F 21°C

Race day low 63°F 17°C

PR Score 95.20 Normal score 97.95