2Slow4Boston Marathon

Greer, SC, USA · April 25, 2027

58°·69° high·Light·Dry

Weather

2Slow4Boston Marathon race day weather

58°at start

76° high

Light

Dry

Your goal

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to see the forecast where you'll be

Comfortable morning, warm finish

Runners will face a temperature rise from 58°F at the start to 69°F by finish. Winds will be light at 7 mph from the SW, with humidity at 67%. As temperatures climb, runners should consider a conservative pace early to adapt to the warming conditions.

Race day forecast available in 148 days

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Distance: 26.2mi

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About the 2Slow4Boston Marathon

2Slow4Boston is an annual marathon, half marathon, and (starting 2027) 50K held in Greer, South Carolina, built around a loop course of a mile-plus repeated multiple times. The 2027 edition introduces a 12-hour time limit for all distances. The race began around 2014 under the name 'Too Slow for Boston' and has run every spring since, reaching its 14th marathon edition in 2027.

Website

Race weekend

Sunday, April 25

7:30 AMMarathon (26.2 mi)

Half Marathon (13.1 mi)

50K (31.1 mi)

Course Map

2Slow4Boston Marathon FAQ

When is the 2027 2Slow4Boston Marathon?

The 2027 2Slow4Boston Marathon will be held on Sunday April 25, 2027.

Is the 2Slow4Boston Marathon a Boston Marathon Qualifier?

No, the 2Slow4Boston Marathon is NOT a Boston Marathon qualifier.

What will the weather be like for the 2027 2Slow4Boston Marathon?

The forecast calls for a high of 76°F and a low of 55°F with a 12% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

What is the weather usually like for the 2Slow4Boston Marathon?

Over the 5 years racecast.io has race-day weather for (2022 to 2026), it averaged 56°F at the start and 68°F by a typical finish. Rain fell during race hours in 2 of those years (2022 and 2023).

What was the hottest 2Slow4Boston Marathon?

Of the 5 years on record, 2024 was the warmest, reaching 75°F during race hours. The coldest start was 2024, at 46°F.

What was the windiest 2Slow4Boston Marathon?

Of the 5 years on record, 2025 was the windiest, with wind averaging 8 mph during race hours. The calmest was 2024, at 3 mph.

2Slow4Boston Marathon weather history

Based on 5 years of data

Avg Temp

61°F

L:56° H:68°

RunScore

Conditions

Rain Freq

40%

2 of 5 yrs

Wind5mph

Dew52°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 2Slow4Boston Marathon Partly cloudy throughout the day. 2026	61°/69°	-	61°
2025 2Slow4Boston Marathon Clear conditions throughout the day. 2025	57°/65°	-	51°
2024 2Slow4Boston Marathon Clear conditions throughout the day. 2024	46°/75°	-	42°
2023 2Slow4Boston Marathon Partly cloudy throughout the day with morning rain. 2023	62°/68°	Light	59°
2022 2Slow4Boston Marathon Partly cloudy throughout the day with morning rain. 2022	54°/62°	Light	49°

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