B.A.A. Boston Half Marathon

Boston, MA, USA • November 9, 2025

Race Day Weather

48°

57° high

Breezy

Dry

Cool conditions, strategic pacing required

Runners will face a starting temperature of 49°F, rising to 57°F by the finish. Winds will peak at 13 mph with a mix of crosswinds and headwinds, particularly challenging between miles 16-19 and 24-26. With humidity at 84%, it’s advisable to adjust pacing strategies accordingly, ensuring adequate hydration and considering gear choices to stay comfortable throughout the race.

6 AM

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

1 PM

2 PM

Pre-raceRace windowPost-race

Course Map

FAQ

When is the 2025 B.A.A. Boston Half Marathon?

The 2025 B.A.A. Boston Half Marathon will be held on Sunday November 9, 2025.

What is the time limit for the B.A.A. Boston Half Marathon?

The time limit for the B.A.A. Boston Half Marathon is 4 hours.

Historical Weather

Based on 23 years of data

Avg Temp

61°F

L:54° H:61°

RunScore

Conditions

Rain Freq

35%

8 of 23 yrs

Wind10mph

Dew45°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2024 B.A.A. Boston Half Marathon Partly cloudy throughout the day with late afternoon rain. 2024	39°/54°	-	20°
2023 B.A.A. Boston Half Marathon Partly cloudy throughout the day. 2023	33°/41°	-	23°
2022 B.A.A. Boston Half Marathon Partly cloudy throughout the day with rain in the morning and afternoon. 2022	51°/52°	Light	49°
2020 B.A.A. Boston Half Marathon Partly cloudy throughout the day. 2020	57°/61°	-	40°
2019 B.A.A. Boston Half Marathon Partly cloudy throughout the day. 2019	59°/67°	-	50°
2018 B.A.A. Boston Half Marathon Cloudy skies throughout the day with rain. 2018	68°/79°	-	65°
2017 B.A.A. Boston Half Marathon Partly cloudy throughout the day with rain. 2017	70°/74°	Light	68°
2016 B.A.A. Boston Half Marathon Cloudy skies throughout the day with a chance of rain throughout the day. 2016	54°/57°	Moderate	55°
2015 B.A.A. Boston Half Marathon Partly cloudy throughout the day. 2015	54°/65°	-	44°
2014 B.A.A. Boston Half Marathon Clear conditions throughout the day. 2014	48°/58°	-	39°
2013 B.A.A. Boston Half Marathon Partly cloudy throughout the day. 2013	55°/60°	-	46°
2012 B.A.A. Boston Half Marathon Partly cloudy throughout the day with rain. 2012	53°/57°	-	39°
2011 B.A.A. Boston Half Marathon Clear conditions throughout the day. 2011	68°/84°	-	52°
2010 B.A.A. Boston Half Marathon Clear conditions throughout the day. 2010	50°/61°	-	31°
2009 B.A.A. Boston Half Marathon Partly cloudy throughout the day. 2009	47°/61°	-	37°
2008 B.A.A. Boston Half Marathon Clear conditions throughout the day with early morning rain. 2008	53°/63°	-	43°
2007 B.A.A. Boston Half Marathon Partly cloudy throughout the day with morning rain. 2007	56°/58°	Light	52°
2006 B.A.A. Boston Half Marathon Clear conditions throughout the day. 2006	48°/66°	-	42°
2005 B.A.A. Boston Half Marathon Cloudy skies throughout the day with a chance of rain throughout the day. 2005	50°/52°	Light	49°
2004 B.A.A. Boston Half Marathon Partly cloudy throughout the day. 2004	60°/65°	-	47°
2003 B.A.A. Boston Half Marathon Partly cloudy throughout the day with rain. 2003	54°/56°	Light	53°
2002 B.A.A. Boston Half Marathon Cloudy skies throughout the day with a chance of rain throughout the day. 2002	56°/57°	Light	55°
2001 B.A.A. Boston Half Marathon Cloudy skies throughout the day with rain. 2001	55°/56°	Light	56°