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Groton, Massachusetts, 2,305 students in 5 schools

Groton-Dunstable School District Snow Day Predictor

The odds of a closing or a delay on the next three school mornings in Groton-Dunstable, measured against Groton-Dunstable's own big snow morning of 5 inches.

The next three school mornings

Will Groton-Dunstable close tomorrow?

Reading the National Weather Service forecast for the overnight and the bus hours in Groton.
Ten winters of school mornings

Groton-Dunstable’s snow record

40.5inches of snow a winter
4.9school mornings a winter with 2 in of new snow or more
2.1with 4 in or more
5 ina big snow morning in Groton-Dunstable: the top tenth of snowy school mornings

More 4 inch school mornings than 56% of the 291 Massachusetts districts with a station record.

1.1Nov
6.6Dec
15.8Jan
9.7Feb
5Mar
Average snowfall by month, inches
  • Biggest day 15 in on February 2, 2021
  • Snowiest winter 2025 to 2026, 58.2 in
  • 6 in mornings 1 a winter
  • 1 in mornings 6.9 a winter

Measured at a NOAA weather station 5.2 miles away. Mornings are the 7 am snow reading on a weekday from December 1 through March 31, over the ten winters from 2016 to 2017 through 2025 to 2026, from NOAA GHCN Daily.

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The Massachusetts rule

How Massachusetts counts a lost day

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.

The Massachusetts rules in the agency’s own words, and every Massachusetts district

Next door

Districts near Groton-Dunstable

DistrictSnow a winter4 in mornings
Ayer-Shirley School DistrictAyer40.5 in2.1
Westford School DistrictWestford40.5 in2.1
Littleton School DistrictLittleton40.5 in2.1
Lunenburg School DistrictLunenburg71.5 in4.2
North Middlesex School DistrictTownsend52.8 in2.6
Harvard School DistrictHarvard48.7 in2.4
The schools

5 schools

Every school in Groton-Dunstable follows the district’s call: one closing covers them all.

High

  • Groton Dunstable Regional

Middle

  • Groton Dunstable Regional Middle

Elementary

  • Florence Roche School
  • Swallow/Union School, Dunstable

Other schools

  • Boutwell School
Questions

Groton-Dunstable snow day questions

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More winter

More for Massachusetts snow days

Snow day predictorClosing and delay odds for any ZIP, with the snowiest districts in the country.Snow depth mapHow much snow is on the ground right now, measured, across the country.First snow datesWhen the first measurable snow usually lands where you live.Frozen pipesThe nights cold enough to freeze a pipe, and what to do before one.Snow plow trackerWhere the plows are during a storm, city by city.Massachusetts winter forecastThe season ahead for Massachusetts: snowfall, cold and the first snow.
A residential street under deep snow on a bright blue morning, cars parked along the curb buried into smooth white mounds, one set of tire tracks down the middle
The morning after a big one: cars buried to the mirrors and one set of tracks down the middle. A street like this is a closing, no debate. Photo, Fairfax, Virginia, January 2016: Jarek Tuszyński, CC BY 4.0

The odds are a forecast read, and the superintendent makes the call: the district’s own announcement is the one to follow.