Historical Race Day Weather for the Shamrock Marathon

March 22, 2026

Race day snapshot

Partially cloudy

Start Line Conditions

Start Temp 55°F 13°C

Start Humidity 96% Humidity

Wind S 6 mph Wind

Race day high 83°F 28°C

Race day low 49°F 9°C

PR Score 97.32 Normal score 99.68

Course Score 99.68 Course-only Score

Course-adjusted pacing

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March 16, 2025

Race day snapshot

Partially cloudy

Start Line Conditions

Start Temp 63°F 17°C

Start Humidity 86% Humidity

Wind SSE 10 mph Wind

Race day high 71°F 22°C

Race day low 60°F 16°C

PR Score 96.33 Normal score 99.68

Course Score 99.68 Course-only Score

March 17, 2024

Race day snapshot

Partially cloudy

Start Line Conditions

Start Temp 50°F 10°C

Start Humidity 100% Humidity

Wind SW 10 mph Wind

Race day high 65°F 18°C

Race day low 49°F 9°C

PR Score 99.00 Normal score 99.68

Course Score 99.68 Course-only Score

March 19, 2023

Race day snapshot

Partially cloudy

Start Line Conditions

Start Temp 43°F 6°C

Start Humidity 50% Humidity

Wind N 14 mph Wind

Race day high 47°F 8°C

Race day low 38°F 3°C

PR Score 99.68 Normal score 99.68

Course Score 99.68 Course-only Score

March 20, 2022

Race day snapshot

Overcast

Start Line Conditions

Start Temp 55°F 13°C

Start Humidity 63% Humidity

Wind WNW 11 mph Wind

Race day high 67°F 19°C

Race day low 52°F 11°C

PR Score 99.68 Normal score 99.68

Course Score 99.68 Course-only Score

March 21, 2021

Race day snapshot

Partly Cloudy

Start Line Conditions

Start Temp 48°F 9°C

Start Humidity 67% Humidity

Wind ENE 11 mph Wind

Race day high 56°F 13°C

Race day low 46°F 8°C

PR Score 99.68 Normal score 99.68

Course Score 99.68 Course-only Score

March 17, 2019

Race day snapshot

Clear

Start Line Conditions

Start Temp 45°F 7°C

Start Humidity 51% Humidity

Wind ENE 9 mph Wind

Race day high 47°F 8°C

Race day low 42°F 6°C

PR Score 99.68 Normal score 99.68

Course Score 99.68 Course-only Score

March 18, 2018

Race day snapshot

Partly Cloudy

Start Line Conditions

Start Temp 43°F 6°C

Start Humidity 70% Humidity

Wind N 10 mph Wind

Race day high 51°F 11°C

Race day low 41°F 5°C

PR Score 99.68 Normal score 99.68

Course Score 99.68 Course-only Score

March 19, 2017

Race day snapshot

Rain

Start Line Conditions

Start Temp 40°F 4°C

Start Humidity 100% Humidity

Wind N 21 mph Wind

Race day high 42°F 6°C

Race day low 37°F 3°C

PR Score 99.68 Normal score 99.68

Course Score 99.68 Course-only Score

March 20, 2016

Race day snapshot

Cloudy

Start Line Conditions

Start Temp 46°F 8°C

Start Humidity 86% Humidity

Wind NE 19 mph Wind

Race day high 46°F 8°C

Race day low 42°F 6°C

PR Score 99.68 Normal score 99.68

Course Score 99.68 Course-only Score

March 22, 2015

Race day snapshot

Mostly Cloudy

Start Line Conditions

Start Temp 43°F 6°C

Start Humidity 79% Humidity

Wind N 15 mph Wind

Race day high 45°F 7°C

Race day low 42°F 6°C

PR Score 99.68 Normal score 99.68

Course Score 99.68 Course-only Score

March 16, 2014

Race day snapshot

Partly Cloudy

Start Line Conditions

Start Temp 45°F 7°C

Start Humidity 67% Humidity

Wind NE 13 mph Wind

Race day high 45°F 7°C

Race day low 45°F 7°C

PR Score 99.68 Normal score 99.68

Course Score 99.68 Course-only Score

March 17, 2013

Race day snapshot

Cloudy

Start Line Conditions

Start Temp 43°F 6°C

Start Humidity 72% Humidity

Wind N 12 mph Wind

Race day high 43°F 6°C

Race day low 42°F 6°C

PR Score 99.68 Normal score 99.68

Course Score 99.68 Course-only Score

March 18, 2012

Race day snapshot

Mostly Cloudy

Start Line Conditions

Start Temp 55°F 13°C

Start Humidity 88% Humidity

Wind N 7 mph Wind

Race day high 64°F 18°C

Race day low 41°F 5°C

PR Score 99.15 Normal score 99.68

Course Score 99.68 Course-only Score

March 20, 2011

Race day snapshot

Scattered Clouds

Start Line Conditions

Start Temp 45°F 7°C

Start Humidity 67% Humidity

Wind NE 11 mph Wind

Race day high 50°F 10°C

Race day low 39°F 4°C

PR Score 99.68 Normal score 99.68

Course Score 99.68 Course-only Score

March 21, 2010

Race day snapshot

Partly Cloudy

Start Line Conditions

Start Temp 56°F 13°C

Start Humidity 58% Humidity

Wind SW 9 mph Wind

Race day high 73°F 23°C

Race day low 53°F 12°C

PR Score 98.64 Normal score 99.68

Course Score 99.68 Course-only Score

2009

Race day snapshot

Clear

Start Line Conditions

Start Temp 37°F 3°C

Start Humidity 88% Humidity

Wind No Wind Wind

Race day high 53°F 12°C

Race day low 30°F -1°C

PR Score 99.68 Normal score 99.68

Course Score 99.68 Course-only Score

2008

Race day snapshot

Partly Cloudy

Start Line Conditions

Start Temp 56°F 13°C

Start Humidity 60% Humidity

Wind NNW 18 mph Wind

Race day high 63°F 17°C

Race day low 48°F 9°C

PR Score 99.68 Normal score 99.68

Course Score 99.68 Course-only Score