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O'Fallon, Missouri, 16,829 students in 27 schools

Fort Zumwalt R-II School District Snow Day Predictor

The odds of a closing or a delay on the next three school mornings in Fort Zumwalt R-II, measured against Fort Zumwalt R-II's own big snow morning of 2.4 inches.

The next three school mornings

Will Fort Zumwalt R-II close tomorrow?

Reading the National Weather Service forecast for the overnight and the bus hours in O'Fallon.
The Fort Zumwalt R-II playbook

How Fort Zumwalt R-II calls a snow day

How families hear

By phone call, text message, email, the district website and the district app.

“That means some families will receive the message multiple ways: Phone call; Text; Email; Pop-up alerts on all of our websites; Alert through the Fort Zumwalt app”
Alternative Methods of Instruction (AMI Days) - Fort Zumwalt School District

Making up a lost day

The 2026-27 Quick Calendar says up to 10 snow days could be made up after Memorial Day, possibly to June 11; the last day, May 27, is tentative.

“Up to 10 Snow days could be made up after Memorial Day, possibly running to June 11.”
Source

The 2026 to 2027 calendar

  • First day August 25, 2026
  • Winter break Dec 23 to Jan 5
  • Last day May 27, 2027
District calendar

Recent snow days

  • 2024 to 2025. The district says 2024-25 was one of the years with six or more inclement weather days.
    “During their 13 years of school, the Class of 2026 has only experienced four years where the district had six or more inclement weather days? 2013-2014 (Kindergarten); 2019-2020 (6th Grade. Doesn't include COVID-19 closure); 2020-2021 (7th Grade), 2021-2022 (8th Grade) and 2024-2025 (11th grade).”
    District notice

Read from Fort Zumwalt R-II’s own pages on October 8, 2026; the district site is fz.k12.mo.us.

Ten winters of school mornings

Fort Zumwalt R-II’s snow record

14.4inches of snow a winter
1.2school mornings a winter with 2 in of new snow or more
0.3with 4 in or more
2.4 ina big snow morning in Fort Zumwalt R-II: the top tenth of snowy school mornings
2school mornings a winter at 0 F or colder
1.6Nov
2.1Dec
5.8Jan
3.7Feb
1Mar
Average snowfall by month, inches
  • Biggest day 12.3 in on January 6, 2025
  • Snowiest winter 2018 to 2019, 28.6 in
  • 6 in mornings 0.2 a winter
  • 1 in mornings 2.3 a winter

Measured at a NOAA weather station 7.3 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.

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The Missouri rule

How Missouri counts a lost day

Missouri requires at least 1,044 hours of actual pupil attendance, plus 36 make-up hours built into the calendar for bad weather. A district must make up the first 36 weather hours and half of any hours beyond that, but never more than 60 make-up hours in total; anything past that is excused.

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

Next door

Districts near Fort Zumwalt R-II

DistrictSnow a winter4 in morningsBuilt in days
Francis Howell R-III School DistrictO'Fallon14.4 in0.3
Wentzville R-IV School DistrictWentzville14.4 in0.36
St. Charles R-VI School DistrictSt Charles8.6 in0.4
Parkway C-2 School DistrictChesterfield9.8 in0.3
Pattonville R-III School DistrictSt Ann12.6 in0.3
Ferguson-Florissant R-II School DistrictHazelwood12.6 in0.3
The schools

27 schools

Every school in Fort Zumwalt R-II follows the district’s call: one closing covers them all.

High

  • Ft. Zumwalt West High
  • Ft. Zumwalt North High
  • Ft. Zumwalt South High, St Peters
  • Ft. Zumwalt East High, St Peters
  • Ft. Zumwalt Hope High

Middle

  • Ft. Zuwmalt West Middle
  • Ft. Zumwalt North Middle
  • Ft. Zumwalt South Middle, St Peters
  • Dr. Bernard J. Dubray Middle, St Peters

Elementary

  • Progress South Elem., St Peters
  • Westhoff Elem.
  • Twin Chimneys Elem.
  • Mid Rivers Elem., St Peters
  • Lewis Clark Elem., St Peters
  • Mount Hope Elem.
  • Hawthorn Elem., St Peters
  • Joseph L. Mudd Elem.
  • Pheasant Point Elem.
  • Dardenne Elem.
  • Rock Creek Elem.
  • Forest Park Elem.
  • Ostmann Elem.
  • St. Peters Elem., St Peters
  • Flint Hill Elementary, Wentzville
  • Emge Elem.

Other schools

  • Early Childhood Center, St. Peters
  • Mike Clemens Center Adapt Lrng
Questions

Fort Zumwalt R-II snow day questions

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More winter

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