Historical Race Day Weather for the Grandmas Marathon

June 20, 2026

Race day snapshot

Overcast

Start Line Conditions

Start Temp 56°F 13°C

Start Humidity 88% Humidity

Wind NW 7 mph Wind

Race day high 70°F 21°C

Race day low 53°F 12°C

PR Score 97.56 Normal score 98.00

Course Score 99.12 Course-only Score

Course-adjusted pacing

Want to run your best Grandmas Marathon?

Grandmas Marathon Pace Bands are adjusted for the specific terrain of the course, your goal time, and pacing strategy.

Build your Grandmas Marathon pace band

Easy to useCourse-aware pacing, goal-time based splits, and a cleaner race day plan.See all pace bands

June 21, 2025

Race day snapshot

Partially cloudy

Start Line Conditions

Start Temp 60°F 16°C

Start Humidity 92% Humidity

Wind ENE 9 mph Wind

Race day high 70°F 21°C

Race day low 50°F 10°C

PR Score 95.87 Normal score 98.00

Course Score 99.12 Course-only Score

June 22, 2024

Race day snapshot

Rain, Overcast

Start Line Conditions

Start Temp 56°F 13°C

Start Humidity 85% Humidity

Wind ENE 17 mph Wind

Race day high 56°F 13°C

Race day low 51°F 11°C

PR Score 98.56 Normal score 98.00

Course Score 99.12 Course-only Score

June 17, 2023

Race day snapshot

Clear

Start Line Conditions

Start Temp 52°F 11°C

Start Humidity 85% Humidity

Wind No Wind Wind

Race day high 63°F 17°C

Race day low 47°F 8°C

PR Score 98.29 Normal score 98.00

Course Score 99.32 Course-only Score

June 18, 2022

Race day snapshot

Clear

Start Line Conditions

Start Temp 54°F 12°C

Start Humidity 70% Humidity

Wind E 8 mph Wind

Race day high 59°F 15°C

Race day low 50°F 10°C

PR Score 99.11 Normal score 98.00

Course Score 99.32 Course-only Score

June 19, 2021

Race day snapshot

Clear

Start Line Conditions

Start Temp 62°F 17°C

Start Humidity 67% Humidity

Wind NNW 6 mph Wind

Race day high 65°F 18°C

Race day low 55°F 13°C

PR Score 98.22 Normal score 98.00

Course Score 99.32 Course-only Score

Live Forecast Tool

Want course-specific race day conditions?

Use the weather tracker to see how temperatures, headwinds, and tailwinds could change across the course based on your goal time and start setup.

Open 2026 Grandma's Marathon Weather Tracker

June 22, 2019

Race day snapshot

Clear

Start Line Conditions

Start Temp 51°F 11°C

Start Humidity 74% Humidity

Wind E 8 mph Wind

Race day high 63°F 17°C

Race day low 50°F 10°C

PR Score 99.32 Normal score 98.00

Course Score 99.32 Course-only Score

June 16, 2018

Race day snapshot

Light Rain

Start Line Conditions

Start Temp 54°F 12°C

Start Humidity 96% Humidity

Wind E 5 mph Wind

Race day high 71°F 22°C

Race day low 49°F 9°C

PR Score 97.12 Normal score 98.00

Course Score 99.32 Course-only Score

June 17, 2017

Race day snapshot

Partly Cloudy

Start Line Conditions

Start Temp 63°F 17°C

Start Humidity 84% Humidity

Wind SSW 4 mph Wind

Race day high 73°F 23°C

Race day low 58°F 14°C

PR Score 96.30 Normal score 98.00

Course Score 99.32 Course-only Score

June 18, 2016

Race day snapshot

Clear

Start Line Conditions

Start Temp 75°F 24°C

Start Humidity 73% Humidity

Wind NNE 3 mph Wind

Race day high 84°F 29°C

Race day low 61°F 16°C

PR Score 93.97 Normal score 98.00

Course Score 99.32 Course-only Score

June 20, 2015

Race day snapshot

Light Rain

Start Line Conditions

Start Temp 62°F 17°C

Start Humidity 86% Humidity

Wind SSW 3 mph Wind

Race day high 73°F 23°C

Race day low 52°F 11°C

PR Score 96.81 Normal score 98.00

Course Score 99.32 Course-only Score

June 21, 2014

Race day snapshot

Cloudy

Start Line Conditions

Start Temp 49°F 9°C

Start Humidity 96% Humidity

Wind E 5 mph Wind

Race day high 63°F 17°C

Race day low 42°F 6°C

PR Score 98.91 Normal score 98.00

Course Score 99.32 Course-only Score

June 22, 2013

Race day snapshot

Cloudy

Start Line Conditions

Start Temp 51°F 11°C

Start Humidity 95% Humidity

Wind NE 16 mph Wind

Race day high 62°F 17°C

Race day low 48°F 9°C

PR Score 98.94 Normal score 98.00

Course Score 99.32 Course-only Score

June 16, 2012

Race day snapshot

Clear

Start Line Conditions

Start Temp 64°F 18°C

Start Humidity 80% Humidity

Wind E 12 mph Wind

Race day high 72°F 22°C

Race day low 54°F 12°C

PR Score 95.43 Normal score 98.00

Course Score 99.32 Course-only Score

June 18, 2011

Race day snapshot

Light Rain

Start Line Conditions

Start Temp 53°F 12°C

Start Humidity 89% Humidity

Wind SE 5 mph Wind

Race day high 64°F 18°C

Race day low 49°F 9°C

PR Score 98.68 Normal score 98.00

Course Score 99.32 Course-only Score

June 19, 2010

Race day snapshot

Overcast

Start Line Conditions

Start Temp 61°F 16°C

Start Humidity 78% Humidity

Wind WNW 15 mph Wind

Race day high 69°F 21°C

Race day low 54°F 12°C

PR Score 97.39 Normal score 98.00

Course Score 99.32 Course-only Score