Greenlawn, New York, 2,798 students in 4 schools

Harborfields Central School District Snow Day Predictor

Q: How much snow does Greenlawn get?

About 26.6 inches a winter at a NOAA weather station under a mile away, averaged over 10 winters. Between December 1 and March 31 that brings 2.5 weekday mornings a year with 2 inches of new snow or more, and 1.6 with 4 inches or more.

Q: What was the biggest snow day near Harborfields?

15.5 inches on February 23, 2026, the largest single day at a NOAA weather station under a mile away in 10 winters. The snowiest winter was 2017 to 2018, with 58.5 inches.

Q: How does the Harborfields snow day predictor work?

It reads the National Weather Service forecast for Greenlawn 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 Harborfields’s own big snow morning: 6.7 inches, the top tenth of snowy weekday mornings at a NOAA weather station under a mile away.

Q: Can New York schools hold a remote day instead?

A district that would otherwise close for a storm may stay in session remotely under its emergency remote instruction plan, and that day counts toward the 180 days and the hours; districts are not required to do it.

The odds of a closing or a delay on the next three school mornings in Harborfields, measured against Harborfields's own big snow morning of 6.7 inches.

The next three school mornings

Will Harborfields close tomorrow?

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

Ten winters of school mornings

Harborfields’s snow record

26.6inches of snow a winter

2.5school mornings a winter with 2 in of new snow or more

1.6with 4 in or more

6.7 ina big snow morning in Harborfields: the top tenth of snowy school mornings

0school mornings a winter at 0 F or colder

0.4Nov

4Dec

7.8Jan

9.5Feb

4.3Mar

Average snowfall by month, inches

Biggest day 15.5 in on February 23, 2026
Snowiest winter 2017 to 2018, 58.5 in
6 in mornings 0.9 a winter
1 in mornings 3.8 a winter

Measured at a NOAA weather station under a mile 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 New York rule

How New York counts a lost day

New York requires 180 days of session plus 900 hours a year for kindergarten to grade 6 and 990 hours for grades 7 to 12. The Commissioner can excuse up to 5 days closed for extraordinary weather, but only if the district cannot make them up by using all its scheduled vacation days before the June Regents exams.

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

Next door

Districts near Harborfields

District	Snow a winter	4 in mornings
Huntington Union Free School DistrictHuntington Station	26.6 in	1.6
Elwood Union Free School DistrictGreenlawn	26.6 in	1.6
Northport-East Northport Union Free School DistrictNorthport	19.2 in	0.9
Cold Spring Harbor Central School DistrictCold Spring Harbor	26.6 in	1.6
South Huntington Union Free School DistrictHuntington Station	12 in	0.7
Commack Union Free School DistrictEast Northport	19.2 in	0.9

The schools

4 schools

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

High

Harborfields High School

Middle

Oldfield Middle School

Elementary

Washington Drive Primary School, Centerport
Thomas J Lahey Elementary School

Questions

Harborfields snow day questions

How much snow does Greenlawn get?

What was the biggest snow day near Harborfields?

How does the Harborfields snow day predictor work?

How does New York handle snow days?

Can New York schools hold a remote day instead?

More winter

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