Lansdowne, Pennsylvania, 4,547 students in 11 schools

William Penn School District Snow Day Predictor

Q: How much snow does Lansdowne get?

About 14.9 inches a winter at a NOAA weather station 5.5 miles away, averaged over 10 winters. Between December 1 and March 31 that brings 1.7 weekday mornings a year with 2 inches of new snow or more, and 0.7 with 4 inches or more.

Q: What was the biggest snow day near William Penn?

9.3 inches on January 25, 2026, the largest single day at a NOAA weather station 5.5 miles away in 10 winters. The snowiest winter was 2025 to 2026, with 30.1 inches.

Q: How does the William Penn snow day predictor work?

It reads the National Weather Service forecast for Lansdowne 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 William Penn’s own big snow morning: 4.2 inches, the top tenth of snowy weekday mornings at a NOAA weather station 5.5 miles away.

Q: Can Pennsylvania schools hold a remote day instead?

A district with a PDE accepted plan can turn up to five closure days a year, including snow days, into Flexible Instructional Days that count as school days; they can be online, offline or both.

The odds of a closing or a delay on the next three school mornings in William Penn, measured against William Penn's own big snow morning of 4.2 inches.

The next three school mornings

Will William Penn close tomorrow?

Reading the National Weather Service forecast for the overnight and the bus hours in Lansdowne.

Ten winters of school mornings

William Penn’s snow record

14.9inches of snow a winter

1.7school mornings a winter with 2 in of new snow or more

0.7with 4 in or more

4.2 ina big snow morning in William Penn: the top tenth of snowy school mornings

0school mornings a winter at 0 F or colder

0.4Nov

2.1Dec

5.2Jan

4.6Feb

2.7Mar

Average snowfall by month, inches

Biggest day 9.3 in on January 25, 2026
Snowiest winter 2025 to 2026, 30.1 in
6 in mornings 0.4 a winter
1 in mornings 2.8 a winter

Measured at a NOAA weather station 5.5 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.

The Pennsylvania rule

How Pennsylvania counts a lost day

Pennsylvania requires either 180 days, or hours: 900 for kindergarten through grade 6 and 990 for grades 7 to 12, as the district chooses. The state forgives no days; districts are expected to build make-up days into the calendar for closures beyond any Flexible Instructional Days.

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

Next door

Districts near William Penn

District	Snow a winter	4 in mornings
Upper Darby School DistrictUpper Darby	14.9 in	0.7
Interboro School DistrictGlenolden	14.9 in	0.7
Southeast Delco School DistrictFolcroft	14.9 in	0.7
Springfield School DistrictSpringfield	14.9 in	0.7
Haverford Township School DistrictHavertown	12.7 in	0.8
Lower Merion School DistrictArdmore	12.7 in	0.8

The schools

11 schools

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

High

Penn Wood HS

Middle

Penn Wood MS, Darby

Elementary

Ardmore Avenue El Sch
Park Lane El Sch, Darby
W B Evans El Sch, Yeadon
East Lansdowne El Sch, East Lansdowne
Walnut Street El Sch, Darby
Bell Avenue School, Yeadon
Aldan El Sch, Aldan
Colwyn El Sch, Colwyn

Other schools

Penn Wood 9th Grade Academy, Yeadon

Questions

William Penn snow day questions

How much snow does Lansdowne get?

What was the biggest snow day near William Penn?

How does the William Penn snow day predictor work?

How does Pennsylvania handle snow days?

Can Pennsylvania schools hold a remote day instead?

More winter

More for Pennsylvania 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.Pennsylvania winter forecastThe season ahead for Pennsylvania: 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.