Glenolden, Pennsylvania, 3,374 students in 6 schools

Interboro School District Snow Day Predictor

Q: How much snow does Glenolden get?

About 14.9 inches a winter at a NOAA weather station 4.3 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 Interboro?

9.3 inches on January 25, 2026, the largest single day at a NOAA weather station 4.3 miles away in 10 winters. The snowiest winter was 2025 to 2026, with 30.1 inches.

Q: How does the Interboro snow day predictor work?

It reads the National Weather Service forecast for Glenolden 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 Interboro’s own big snow morning: 4.2 inches, the top tenth of snowy weekday mornings at a NOAA weather station 4.3 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 Interboro, measured against Interboro's own big snow morning of 4.2 inches.

The next three school mornings

Will Interboro close tomorrow?

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

Ten winters of school mornings

Interboro’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 Interboro: 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 4.3 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 Interboro

District	Snow a winter	4 in mornings
Southeast Delco School DistrictFolcroft	14.9 in	0.7
Ridley School DistrictFolsom	14.9 in	0.7
Springfield School DistrictSpringfield	14.9 in	0.7
William Penn School DistrictLansdowne	14.9 in	0.7
Wallingford-Swarthmore School DistrictWallingford	14.9 in	0.7
Upper Darby School DistrictUpper Darby	14.9 in	0.7

The schools

6 schools

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

High

Interboro SHS, Prospect Park

Elementary

Glenolden Sch
Norwood Sch, Norwood
Prospect Park Sch, Prospect Park
Tinicum Sch, Essington
Kindergarten Academy, Prospect Park

Questions

Interboro snow day questions

How much snow does Glenolden get?

What was the biggest snow day near Interboro?

How does the Interboro 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.