Historical Race Day Weather for the Ottawa Marathon

May 24, 2026

Race day snapshot

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

Course-adjusted pacing

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May 25, 2025

Race day snapshot

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

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

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

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

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

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

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