Sunday, October 18, 2026Old Greenwich, CT
HSS Greenwich Half Marathon
1 event
- Half MarathonHalfRoadStarts 7:30 AM
Location
Approximate, from the race's ZIP code.
Typical race-day weatherIdeal weather · 95/100
- High / low
- 65° / 47°F
- 18° / 8°C
- Humidity
- 77%
- Dew point 47°F
- Chance of rain
- 28%
- Wind
- 7 mph
- Average
- Usually ideal weather for a half marathon.
Averages for this area and time of year over the last 20 years, from NASA POWER data. Not a forecast.