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Algonquin, Illinois, 20,488 students in 29 schools

Community Unit School District 300 Snow Day Predictor

The odds of a closing or a delay on the next three school mornings in Community Unit School District 300, measured against Community Unit School District 300's own big snow morning of 3 inches.

The next three school mornings

Will Community Unit School District 300 close tomorrow?

Reading the National Weather Service forecast for the overnight and the bus hours in Algonquin.
The Community Unit School District 300 playbook

How Community Unit School District 300 calls a snow day

How families hear

By email.

“In an effort to keep parents and guardians informed, District 300 will send an RCS email after each emergency day to confirm the make-up date.”

5 built in snow days

On the 2026 to 2027 calendar, listed as “emergency make-up days”.

“For the 2026-27 school year, District 300 will make up a maximum of 5 emergency days.”
Source

Making up a lost day

In order: February 12, then May 24 to 27, after the May 21 last day.

Make up dates: Feb 12, May 24, May 25, May 26, May 27.

“1st Make-Up Date February 12, 2027 would become a school attendance day”
Source

The 2026 to 2027 calendar

  • First day August 11, 2026
  • Winter break Dec 21 to Jan 1
  • Last day May 21, 2027
District calendar

Read from Community Unit School District 300’s own pages on October 8, 2026; the district site is d300.org.

Ten winters of school mornings

Community Unit School District 300’s snow record

26.7inches of snow a winter
2.8school mornings a winter with 2 in of new snow or more
0.6with 4 in or more
3 ina big snow morning in Community Unit School District 300: the top tenth of snowy school mornings

More 4 inch school mornings than 52% of the 788 Illinois districts with a station record.

2.8Nov
3.8Dec
9Jan
6.6Feb
2Mar
Average snowfall by month, inches
  • Biggest day 8 in on January 19, 2019
  • Snowiest winter 2018 to 2019, 51 in
  • 6 in mornings 0.1 a winter
  • 1 in mornings 5.8 a winter

Measured at a NOAA weather station 2.3 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 Illinois rule

How Illinois counts a lost day

Illinois requires a calendar of at least 185 days to guarantee 176 days of actual student attendance, each of at least 5 clock hours. The extra calendar days are emergency days used first; after they are gone, the State Superintendent may excuse days lost to an act of God or a hazard beyond the district's control without cutting state aid.

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

Next door

Districts near Community Unit School District 300

DistrictSnow a winter4 in morningsBuilt in days
Huntley Consolidated School District 158Algonquin26.7 in0.6
Community High School District 155Crystal Lake26.7 in0.6
Crystal Lake Community Consolidated School District 47Crystal Lake29.1 in0.4
School District U-46Elgin27.1 in0.75
Barrington Community Unit School District 220Barrington25.4 in0.8
Wauconda Community Unit School District 118Wauconda35.5 in1
The schools

29 schools

Every school in Community Unit School District 300 follows the district’s call: one closing covers them all.

High

  • Dundee-Crown High School, Carpentersville
  • Harry D Jacobs High School
  • Hampshire High School, Hampshire
  • Oak Ridge School, Carpentersville

Middle

  • Dundee Middle School, Dundee
  • Carpentersville Middle School, Carpentersville
  • Hampshire Middle School, Hampshire
  • Algonquin Middle School

Elementary

  • Westfield Community School
  • Liberty Elementary School, Carpentersville
  • Gilberts Elem Sch, Gilberts
  • Gary D Wright Elem Sch, Hampshire
  • Parkview Elementary School, Carpentersville
  • Lakewood School, Carpentersville
  • Lake in the Hills Elem School, Lk In The Hls
  • Lincoln Prairie Elem School, Lake In The Hills
  • Hampshire Elem School, Hampshire
  • Meadowdale Elem School, Carpentersville
  • Big Timber Elementary School, Hampshire
  • Kenneth E Neubert Elem School
  • Sleepy Hollow Elem School, Sleepy Hollow
  • Algonquin Lakes Elem Sch
  • Golfview Elem School, Carpentersville
  • Eastview Elem School
  • Dundee Highlands Elem School, West Dundee
  • Perry Elementary School, Carpentersville
  • DREAM Academy, Carpentersville

Other schools

  • Cambridge Lakes Charter School, Pingree Grove
  • Delacey Family Educ Ctr, Carpentersville
Questions

Community Unit School District 300 snow day questions

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More winter

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