New Haven Road Race Half Marathon race day weather
70°at start
74° high
Breezy
Dry
Your goal
0:00:00
to see the forecast where you'll be
Warm start
Starting at 70°F, heat will be a factor from the gun — go out conservative and stay on top of hydration. Light winds shouldn't be a major factor for pacing. Moderate humidity at 78% is worth noting for effort level, especially in later miles.
Race day forecast available in 289 days
Pre-raceRace windowPost-race
Pace Calculator
Distance: 13.1mi
0:00:00
HH:MM:SS
Pace
—
Enter a finish time to see what race day does to it.
Pace
—
Enter a finish time to see your race-day finish and True Effort, with what the weather, wind and hills do to it.
Common Goals:
Get forecast alerts for New Haven Road Race Half Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
About the New Haven Road Race Half Marathon
The New Haven Road Race Half Marathon starts and finishes on the New Haven Green and covers the same flat city loop as the 20K, with an extra stretch added on Whitney Avenue. The course runs west past Yale and Edgewood Park into the Westville neighborhood, then loops back through downtown and out State Street to East Rock Park, where English Drive and Farnum Drive wind through the park. Runners return down Whitney Avenue and Temple Street to the Green, with spectators lining the streets through the center of the city on Labor Day.
When is the 2027 New Haven Road Race Half Marathon?
The 2027 New Haven Road Race Half Marathon will be held on Monday September 6, 2027.
What is the time limit for the New Haven Road Race Half Marathon?
The time limit for the New Haven Road Race Half Marathon is 3 hours.
What will the weather be like for the 2027 New Haven Road Race Half Marathon?
The forecast calls for a high of 75°F and a low of 68°F with a 10% chance of rain.
What is the weather usually like for the New Haven Road Race Half Marathon?
Over the 49 years racecast.io has race-day weather for (1978 to 2026), it averaged 67°F at the start and 71°F by a typical finish. Rain fell during race hours in 8 of those years.
What was the hottest New Haven Road Race Half Marathon?
Of the 49 years on record, 2023 was the warmest, reaching 84°F during race hours. The coldest start was 1991, at 56°F.
What was the windiest New Haven Road Race Half Marathon?
Of the 49 years on record, 1990 was the windiest, with wind averaging 15 mph during race hours. The calmest was 2010, at 0 mph.
New Haven Road Race Half Marathon weather history
Based on 49 years of data
Avg Temp
69°F
L:66° H:71°
RunScore
Conditions
Rain Freq
16%
8 of 49 yrs
Wind7mph
Dew61°F
Temperature History
Range of temperatures during race hours for each year.
