Canterbury Elementary School is dismissing at 11 a.m. due to a power issue.
The superintendent's office said it appears that a fallen tree may have been the reason for the outage.
The rest of the schools in the district were not affected.
A wind advisory is in effect until 6 p.m. for Windham County. Gusts of up to 50 mph were a possibility, according to WFSB meteorologists.
Copyright 2015 WFSB (Meredith Corporation). All rights reserved.