Clarence DeMar Half Marathon

Keene, NH, USA · September 26, 2027·
partly-cloudy-day57°·64° high·Light·Dry
7
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Clarence DeMar Half Marathon race day weather

partly-cloudy-day
57°at start
72° high
Breezy
Dry
Your goal
0:00:00

Comfortable temps, warming through the race

Mild 57°F temps at gun time mean comfortable early miles without overheating risk. Temperatures rising to 72°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing. Moderate humidity at 69% is worth noting for effort level, especially in later miles.

Race day forecast available in 309 days
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About the Clarence DeMar Half Marathon

The Clarence DeMar Half Marathon covers 13.1 miles from the Surry Mountain Lake recreation area in Surry to Keene State College. The route follows Route 12A and East Surry Road past Bretwood Golf Course, then runs into Keene along Court Street and Maple Avenue. Runners pass through Wheelock Park and along the bike path, then climb through Greenlawn and Woodland cemeteries before the last miles on Marlboro and Main Streets. The finish is on Appian Way, a pedestrian way at the college, where Clarence DeMar once coached.

Race weekend

Sunday, September 26
7:00 AMMarathon (26.2 mi)
8:00 AMHalf Marathon (13.1 mi)
Area Map
Course Map

Clarence DeMar Half Marathon FAQ

When is the 2027 Clarence DeMar Half Marathon?

The 2027 Clarence DeMar Half Marathon will be held on Sunday September 26, 2027.

What will the weather be like for the 2027 Clarence DeMar Half Marathon?

The forecast calls for a high of 70°F and a low of 53°F with a 10% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.

What is the weather usually like for the Clarence DeMar Half Marathon?

Over the 18 years racecast.io has race-day weather for (2008 to 2026), it averaged 52°F at the start and 58°F by a typical finish. Rain fell during race hours in 2 of those years (2009 and 2026).

What was the hottest Clarence DeMar Half Marathon?

Of the 18 years on record, 2017 was the warmest, reaching 74°F during race hours. The coldest start was 2015, at 36°F.

What was the windiest Clarence DeMar Half Marathon?

Of the 18 years on record, 2019 was the windiest, with wind averaging 14 mph during race hours. The calmest was 2013, at 0 mph.

Clarence DeMar Half Marathon weather history

Based on 18 years of data
Avg Temp
55°F
L:52° H:58°
RunScore
8
Conditions
Rain Freq
11%
2 of 18 yrs
Wind2mph
Dew51°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
cloudy
57°/57°Light
7
2025
partly-cloudy-day
58°/66°-
6
2024
cloudy
57°/61°-
7
2023
cloudy
53°/56°-
8
2022
cloudy
41°/49°-
10
2021
cloudy
53°/60°-
7
2019
clear-day
61°/64°-
7
2018
fog
42°/46°-
10
2017
clear-day
58°/74°-
5
2016
fog
36°/47°-
10
2015
fog
36°/45°-
10
2014
fog
54°/57°-
9
2013
fog
45°/50°-
10
2012
cloudy
54°/55°-
9
2011
fog
64°/66°-
5
2010
clear-day
53°/61°-
9
2009
rain
52°/56°Light
9
2008
cloudy
65°/66°-
5