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Historical weather

Historical Race Day Weather for the Ottawa Marathon

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

Weather Averages for Last 8 Years

Race day snapshot
Mostly Cloudy
Mostly Cloudy
Most common race morning weather across the last 8 years.
Start Line Conditions
Start Temp 57°F 14°C
Start Humidity 77% Humidity
Wind ESE 6 mph
Race day high 71°F 22°C
Race day low 53°F 12°C
PR Score 97.75 Weather-influenced race day scoring
Course Score 98.82 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 24, 2026

Race day snapshot
Partially cloudy
Partially cloudy
Start Line Conditions
Start Temp 51°F 11°C
Start Humidity 87% Humidity
Wind ESE 11 mph Wind
Race day high 57°F 14°C
Race day low 50°F 10°C
PR Score 98.49 Normal score 98.24
Course Score 98.56 Course-only Score
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May 25, 2025

Race day snapshot
Overcast
Overcast
Start Line Conditions
Start Temp 51°F 11°C
Start Humidity 84% Humidity
Wind NW 4 mph Wind
Race day high 64°F 18°C
Race day low 46°F 8°C
PR Score 98.49 Normal score 98.24
Course Score 98.56 Course-only Score

May 26, 2024

Race day snapshot
Partially cloudy
Partially cloudy
Start Line Conditions
Start Temp 59°F 15°C
Start Humidity 77% Humidity
Wind ENE 1 mph Wind
Race day high 70°F 21°C
Race day low 56°F 13°C
PR Score 97.24 Normal score 98.24
Course Score 98.69 Course-only Score

May 28, 2023

Race day snapshot
Clear
Clear
Start Line Conditions
Start Temp 61°F 16°C
Start Humidity 55% Humidity
Wind W 8 mph Wind
Race day high 83°F 28°C
Race day low 56°F 13°C
PR Score 97.71 Normal score 98.24
Course Score 98.69 Course-only Score

May 29, 2022

Race day snapshot
Clear
Clear
Start Line Conditions
Start Temp 57°F 14°C
Start Humidity 80% Humidity
Wind SW 4 mph Wind
Race day high 78°F 26°C
Race day low 53°F 12°C
PR Score 97.31 Normal score 98.24
Course Score 99.02 Course-only Score

May 26, 2019

Race day snapshot
Mostly Cloudy
Mostly Cloudy
Start Line Conditions
Start Temp 62°F 17°C
Start Humidity 95% Humidity
Wind WSW 6 mph Wind
Race day high 72°F 22°C
Race day low 60°F 16°C
PR Score 96.12 Normal score 98.24
Course Score 99.02 Course-only Score

May 27, 2018

Race day snapshot
Mostly Cloudy
Mostly Cloudy
Start Line Conditions
Start Temp 57°F 14°C
Start Humidity 62% Humidity
Wind E 9 mph Wind
Race day high 72°F 22°C
Race day low 57°F 14°C
PR Score 98.11 Normal score 98.24
Course Score 99.02 Course-only Score

May 27, 2012

Race day snapshot
Mostly Cloudy
Mostly Cloudy
Start Line Conditions
Start Temp 55°F 13°C
Start Humidity 77% Humidity
Wind NE 7 mph Wind
Race day high 74°F 23°C
Race day low 49°F 9°C
PR Score 98.52 Normal score 98.24
Course Score 99.02 Course-only Score