Chelmsford School District Snow Day Predictor

By phone call, email, the district website, social media, local TV and radio, and on the district’s own closings page.

6 for the 2026 to 2027 school year, listed on the calendar as “provisional snow days”.

2 hours: on a delay morning every school starts that much later.

June 24, 2027, on the district’s 2026 to 2027 calendar.

About 44.8 inches a winter at a NOAA weather station 1.6 miles away, averaged over 8 winters. Between December 1 and March 31 that brings 6 weekday mornings a year with 2 inches of new snow or more, and 2.5 with 4 inches or more.

It reads the National Weather Service forecast for Chelmsford through the night and the 5 to 8 am bus run, adds winter alerts and the Winter Storm Severity Index, and measures the snow against Chelmsford’s own big snow morning: 10.8 inches, the top tenth of snowy weekday mornings at a NOAA weather station 1.6 miles away.

Massachusetts requires a 185 day calendar, at least 180 days actually held, and 900 hours for elementary or 990 hours for secondary students. Every day lost through March 31 is made up with full rescheduled days; after March 31, days are made up until 180 or the scheduled 185th day, whichever comes first.