Rigby, Idaho, 6,706 students in 12 schools

Jefferson County Joint School District 251 Snow Day Predictor

Q: When is the last day of school for Jefferson?

May 27, 2027, on the district’s 2026 to 2027 calendar.

Q: How much snow does Rigby get?

About 50.7 inches a winter at a NOAA weather station 1.2 miles away, averaged over 9 winters. Between December 1 and March 31 that brings 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 Jefferson?

9 inches on December 25, 2016, the largest single day at a NOAA weather station 1.2 miles away in 9 winters. The snowiest winter was 2022 to 2023, with 76.5 inches.

Q: Does Jefferson get more snow days than other Idaho districts?

Jefferson averages 1.6 weekday mornings a winter with 4 inches of new snow or more, more than 55 percent of the 87 Idaho districts with a station record.

Q: How does the Jefferson snow day predictor work?

It reads the National Weather Service forecast for Rigby 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 Jefferson’s own big snow morning: 3 inches, the top tenth of snowy weekday mornings at a NOAA weather station 1.2 miles away.

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

The next three school mornings

Will Jefferson close tomorrow?

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

The Jefferson playbook

How Jefferson calls a snow day

The 2026 to 2027 calendar

First day August 24, 2026
Winter break Dec 21 to Dec 31
Last day May 27, 2027

District calendar

Read from Jefferson’s own pages on October 8, 2026; the district site is jeffersonsd251.org.

Ten winters of school mornings

Jefferson’s snow record

50.7inches of snow a winter

5school mornings a winter with 2 in of new snow or more

1.6with 4 in or more

3 ina big snow morning in Jefferson: the top tenth of snowy school mornings

6.1school mornings a winter at 0 F or colder

More 4 inch school mornings than 55% of the 87 Idaho districts with a station record.

4.1Nov

14.7Dec

12.1Jan

10.6Feb

6.2Mar

Average snowfall by month, inches

Biggest day 9 in on December 25, 2016
Snowiest winter 2022 to 2023, 76.5 in
6 in mornings 0.1 a winter
1 in mornings 15.4 a winter

Measured at a NOAA weather station 1.2 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 Idaho rule

How Idaho counts a lost day

Idaho requires at least 990 instructional hours for grades 9 to 12, 900 for grades 4 to 8, 810 for grades 1 to 3 and 450 for kindergarten. With local board approval, up to 11 hours of emergency closures for bad weather or facility failures can come off the yearly hours requirement.

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

Next door

Districts near Jefferson

District	Snow a winter	4 in mornings
Bonneville Joint School District 93Idaho Falls	47.9 in	0.8
Idaho Falls School District 91Idaho Falls	47.9 in	0.8
Madison School District 321Rexburg	60.1 in	2.3
Blackfoot School District 55Blackfoot	27.5 in	0.4
Snake River School District 52Blackfoot	27.5 in	0.4
Pocatello School District 25Pocatello	38 in	1.2

The schools

12 schools

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

High

Rigby High School
Jefferson High School, Menan

Middle

Rigby Middle School
Farnsworth Middle School

Elementary

South Fork Elementary School
Cottonwood Elementary
Jefferson Elementary School
Harwood Elementary School
Midway Elementary School, Menan
Roberts Elementary School, Roberts
Rigby Virtual Academy

Other schools

Jefferson School District 251 Early Childhood Center

Questions

Jefferson snow day questions

When is the last day of school for Jefferson?

How much snow does Rigby get?

What was the biggest snow day near Jefferson?

Does Jefferson get more snow days than other Idaho districts?

How does the Jefferson snow day predictor work?

How does Idaho handle snow days?

More winter

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