Maryland Snow Day Predictor: Odds by School District

Q: Which Maryland school districts does the predictor cover?

All 24 in the state, by ZIP, with a page of their own for 22, including Montgomery, Prince George's and Baltimore County Public Schools. Every page carries the district’s own snow record and the odds for its next three school mornings.

Q: How many snow days do Maryland schools get?

A typical Maryland district sees about 1.3 weekday mornings a winter with 2 inches of new snow or more, and 0.6 with 4 inches or more, counted on weekdays from December 1 through March 31 at each district’s nearest NOAA weather station over ten winters. The snowiest districts in the table see several times that.

Q: How far ahead does the Maryland snow day predictor look?

Three school mornings, as far as the National Weather Service hourly forecast reaches. Weekends and the district’s winter break are skipped, so a Friday storm is read for Monday’s buses.

Q: How does the Maryland snow day predictor work?

It reads the National Weather Service forecast for your ZIP through the night and the bus hours, adds winter alerts and the Winter Storm Severity Index, and measures the snow against what counts as a big morning for your district. The state rules come from the Maryland State Department of Education and the state code.

Your district, your mornings

Snow day odds for your Maryland ZIP

The next school morning

Tomorrow in Maryland

The state’s biggest districts, each read against its own forecast and its own big snow morning.

MontgomeryRockville
Reading the forecast
Prince George'sUpper Marlboro
Reading the forecast
Baltimore County Public SchoolsTowson
Reading the forecast
Anne ArundelAnnapolis
Reading the forecast
Baltimore City Public SchoolsBaltimore
Reading the forecast
HowardEllicott City
Reading the forecast

24

Maryland school districts

22 with a page of their own

10.1

Inches of snow a winter, typical district

the median across the state

1.3

School mornings a winter with 2 in or more

in a typical district

0.6

With 4 in or more

the mornings that close schools

The Maryland rules

How Maryland counts a snow day

The school year

Maryland requires at least 180 school days and 1,080 hours within 10 months, with days of at least 3 hours.

“Shall be open for pupil attendance for at least 180 actual school days and a minimum of 1,080 school hours during a 10–month period in each school year”

Md. Code, Educ. § 7-103(a)

Forgiven days

On a county board's application showing it tried to comply, the State Board may shorten the year when severe weather or a disaster prevented normal attendance, without cutting state or local funding.

“These adjustments may be granted only if normal school attendance is prevented because of: (i) Natural disaster; (ii) Civil disaster; or (iii) Severe weather conditions.”

Md. Code, Educ. § 7-103(b)

From the Maryland State Department of Education and the state code, read October 8, 2026.

The snowiest school mornings in Maryland

Where Maryland’s 4 inch mornings pile up

Ranked by weekday mornings from December through March with 4 inches or more of new snow at the 7 am reading, averaged over ten winters at each district’s nearest NOAA weather station.

#	District	4 in mornings a winter	Snow a winter
1	Garrett County Public SchoolsOakland	4.9	68.6 in
2	Allegany County Public SchoolsCumberland	1.2	17.9 in
3	Baltimore County Public SchoolsTowson	1	15.7 in
4	Washington County Public SchoolsHagerstown	0.8	16.6 in
5	Howard County Public SchoolsEllicott City	0.8	11.4 in
6	Carroll County Public SchoolsWestminster	0.7	16 in
7	Harford County Public SchoolsBel Air	0.7	11.8 in
8	St. Marys County Public SchoolsLeonardtown	0.7	9.2 in
9	Queen Annes County Public SchoolsCentreville	0.6	11.5 in
10	Wicomico County Public SchoolsSalisbury	0.6	8.1 in

Built in snow days

How many snow days Maryland districts plan for

11 Maryland districts print a number of snow days on their own 2026 to 2027 calendars. A closing inside that number leaves the calendar as printed; one past it is made up, usually from a break or the end of the year.

The most built in

The fewest

Every district in Maryland

All 24 Maryland school districts

Snow a winter and 4 inch mornings come from each district’s nearest NOAA weather station over ten winters. Built in days are the district’s own, read from its calendar. Every linked district has a page with its live odds, its snow record and its schools.

Sort24 districts

District	Students	Snow a winter	4 in mornings	Built in days
Montgomery County Public SchoolsRockville	160,223	7.4 in	0.4
Prince George's County Public SchoolsUpper Marlboro	131,310	7.1 in	0.3	3
Baltimore County Public SchoolsTowson	110,275	15.7 in	1	3
Anne Arundel County Public SchoolsAnnapolis	84,346	10.6 in	0.5	3
Baltimore City Public SchoolsBaltimore	75,811	4.4 in	0.1	3
Howard County Public SchoolsEllicott City	57,633	11.4 in	0.8	6
Frederick County Public SchoolsFrederick	47,681	17.7 in	0.5	6
Harford County Public SchoolsBel Air	38,105	11.8 in	0.7	3
Charles County Public SchoolsLa Plata	27,765	8.9 in	0.5	6
Carroll County Public SchoolsWestminster	26,123	16 in	0.7	4
Washington County Public SchoolsHagerstown	22,549	16.6 in	0.8	6
St. Marys County Public SchoolsLeonardtown	17,223	9.2 in	0.7	3
Calvert County Public SchoolsPrince Frederick	15,179	8.3 in	0.4
Wicomico County Public SchoolsSalisbury	15,086	8.1 in	0.6
Cecil County Public SchoolsElkton	14,997	16.1 in	0.4
Allegany County Public SchoolsCumberland	8,205	17.9 in	1.2
Queen Annes County Public SchoolsCentreville	7,502	11.5 in	0.6
Worcester County Public SchoolsNewark	6,848	8.1 in	0.6
Caroline County Public SchoolsDenton	5,676	9.3 in	0.5
Dorchester County Public SchoolsCambridge	4,608	9.5 in	0.5
Talbot County Public SchoolsEaston	4,502	9.5 in	0.5
Garrett County Public SchoolsOakland	3,455	68.6 in	4.9
Somerset County Public SchoolsWestover	2,894	8.6 in	0.4
Kent County Public SchoolsRock Hall	1,732	11.5 in	0.6