Cambridge School District Snow Day Predictor
The odds of a closing or a delay on the next three school mornings in Cambridge, measured against Cambridge's own big snow morning of 5.9 inches.
Will Cambridge close tomorrow?
How Cambridge calls a snow day
When the call comes
As early as possible, the night before, but sometimes early morning.
“We do our best to make the decision about any school closure as early as possible (i.e, the night before), but sometimes weather conditions are so uncertain that we need to wait until early morning to make the call.”Source
How families hear
By phone call, text message, email, the district website, social media, the district app, local TV and radio.
“Look for a ParentSquare Alert. Download the App today >> Watching major television and radio stations for closing announcements.”About School Closings - Cambridge Public Schools
5 built in snow days
On the 2026 to 2027 calendar, listed as “snow days”.
“June 22: Last Day of School & 4-Hour School Day (if 0 snow days) *June 29: Last Day of School & 4-Hour School Day (if 5 snow days)”Source
Making up a lost day
Added to the end of the year, moving the last day from June 22 to as late as June 29.
“June 22: Last Day of School & 4-Hour School Day (if 0 snow days) *June 29: Last Day of School & 4-Hour School Day (if 5 snow days)”Source
The 2026 to 2027 calendar
- First day September 1, 2026
- Winter break Dec 24 to Jan 1
- February break Feb 15 to Feb 19
- Last day June 22, 2027
Recent snow days
- 2025 to 2026: 4 days. Four weather cancellations; a March 18 PD day was turned into a school day and the last day moved from June 29 to June 26.
“CPS canceled school four times this winter due to inclement weather.”
News report
Read from Cambridge’s own pages on October 8, 2026; the district site is cpsd.us.
Cambridge’s snow record
- Biggest day 18.7 in on March 14, 2018
- Snowiest winter 2017 to 2018, 59.4 in
- 6 in mornings 1 a winter
- 1 in mornings 5.3 a winter
Measured at a NOAA weather station 4.1 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.
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
Districts near Cambridge
| District | Snow a winter | 4 in mornings | Built in days |
|---|---|---|---|
| Somerville School DistrictSomerville | 34.4 in | 1.8 | |
| Boston School DistrictRoxbury | 34.3 in | 1.5 | |
| Brookline School DistrictBrookline | 34.3 in | 1.5 | |
| Everett School DistrictEverett | 35.6 in | 1.3 | 5 |
| Chelsea School DistrictChelsea | 35.6 in | 1.3 | |
| Malden School DistrictMalden | 28.2 in | 1.5 | 5 |
17 schools
Every school in Cambridge follows the district’s call: one closing covers them all.
High
- Cambridge Rindge and Latin
Middle
- Cambridge Street Upper School
- Rindge Avenue Upper School
- Putnam Avenue Upper School
- Vassal Lane Upper School
Elementary
- Amigos School
- Graham and Parks
- King Open
- Maria L. Baldwin
- Martin Luther King Jr.
- John M Tobin
- Peabody
- Morse
- Cambridgeport
- Fletcher/Maynard Academy
- Haggerty
- Kennedy-Longfellow
Cambridge snow day questions
More for Massachusetts snow days
The odds are a forecast read, and the superintendent makes the call: the district’s own announcement is the one to follow.