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Londonderry, New Hampshire, 4,024 students in 6 schools

Londonderry School District Snow Day Predictor

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

The next three school mornings

Will Londonderry close tomorrow?

Reading the National Weather Service forecast for the overnight and the bus hours in Londonderry.
The Londonderry playbook

How Londonderry calls a snow day

How families hear

By email, text message and phone call.

“The Londonderry School district uses the SchoolMessenger notification service to send important information to families through phone calls, emails, and text messages. These messages include, school closings and delays”
Londonderry School District - Closings & Delays

5 built in snow days

On the 2026 to 2027 calendar, listed as “built in snow days”.

“Possible additional days to be added in June pending school cancellations exceeding the 5 built in snow days”
Source

Making up a lost day

Cancellations beyond the 5 built in snow days add days in June, after the June 17 last day.

“Possible additional days to be added in June pending school cancellations exceeding the 5 built in snow days”
Source

The 2026 to 2027 calendar

  • First day August 31, 2026
  • Winter break Dec 24 to Jan 1
  • February break Feb 22 to Feb 26
  • Last day June 17, 2027
District calendar

Read from Londonderry’s own pages on October 8, 2026; the district site is londonderry.org.

Ten winters of school mornings

Londonderry’s snow record

51.3inches of snow a winter
5.3school mornings a winter with 2 in of new snow or more
2.8with 4 in or more
5 ina big snow morning in Londonderry: the top tenth of snowy school mornings
1.5school mornings a winter at 0 F or colder
1.5Nov
9.3Dec
14.6Jan
15.1Feb
8.5Mar
Average snowfall by month, inches
  • Biggest day 16.6 in on March 13, 2018
  • Snowiest winter 2017 to 2018, 78.5 in
  • 6 in mornings 1.3 a winter
  • 1 in mornings 8.1 a winter

Measured at a NOAA weather station 1.1 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 New Hampshire rule

How New Hampshire counts a lost day

New Hampshire requires 180 days or the required hours: 450 in kindergarten, 945 in grades 1 to 6 and 990 in grades 7 to 12. Lost time must be rescheduled with added hours before a district can ask for a waiver of the hours requirement.

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

Next door

Districts near Londonderry

DistrictSnow a winter4 in morningsBuilt in days
Bedford School DistrictBedford51.3 in2.85
Manchester School DistrictManchester50.3 in3.6
Pinkerton Academy School DistrictDerry74.3 in3.9
Derry School DistrictDerry74.3 in3.9
Merrimack School DistrictMerrimack47.3 in3
Litchfield School DistrictLitchfield47.3 in3
The schools

6 schools

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

High

  • Londonderry Senior High School

Middle

  • Londonderry Middle School

Elementary

  • Matthew Thornton Elementary School
  • North Londonderry Elementary School
  • South Londonderry Elementary School

Other schools

  • Moose Hill School
Questions

Londonderry snow day questions

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More winter

More for New Hampshire 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.New Hampshire winter forecastThe season ahead for New Hampshire: 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.