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Summer Break
School starts Aug 25
Next 7 Days
August 2026
Coming Up
1 this weekSchool Breaks
Holidays (No School)
The Clinton County R-III School District school calendar for the 2026-27 school year runs from Tuesday, August 25, 2026 to Friday, May 21, 2027 in Plattsburg, Missouri.
- •2 scheduled breaks and 1 holiday throughout the year
- •Winter break: Dec 21 – Jan 4
Clinton County R-III School District starts school 379 days later than most Missouri districts. Winter break starts 364 days later than the most common Missouri schedule.
Download the iCal file above to sync all Clinton County R-III School District dates with your phone or computer.
Frequently Asked Questions
Is Clinton County R-III School District school open today?
No, Clinton County R-III School District is currently on summer break. School starts Tuesday, August 25, 2026.
When is the next day off for Clinton County R-III School District?
The next day off is Monday, September 7, 2026 for Labor Day.
When is the first day of school for Clinton County R-III School District?
The first day of school for Clinton County R-III School District in 2026-27 is Tuesday, August 25, 2026.
When is the last day of school for Clinton County R-III School District?
The last day of school for Clinton County R-III School District in 2026-27 is Friday, May 21, 2027.
When is spring break for Clinton County R-III School District?
Spring break dates for Clinton County R-III School District are not yet available.
When is winter break for Clinton County R-III School District?
Winter break for Clinton County R-III School District is Monday, December 21, 2026 to Monday, January 4, 2027.
When do students go back to school after winter break?
Students in Clinton County R-III School District return to school after winter break on Tuesday, January 5, 2027. Winter break ends on Monday, January 4, 2027.
When is Thanksgiving break for Clinton County R-III School District?
Thanksgiving break for Clinton County R-III School District is Wednesday, November 25, 2026 to Friday, November 27, 2026.
How do I add Clinton County R-III School District calendar to my phone?
Click the "Add to Calendar" button at the top of this page to download the iCal (.ics) file. Then:
iPhone/iPad: Tap the downloaded file, then tap "Add All" to add events to your Calendar app.
Android: Open the file with Google Calendar, review the events, and tap "Import".
Google Calendar (web): Go to Settings → Import & Export → Select the .ics file → Import.
Outlook: Double-click the file or drag it into your Outlook calendar.
Apple Calendar (Mac): Double-click the file or go to File → Import → select the .ics file.
What school district is Plattsburg, MO in?
Plattsburg, Missouri is served by Clinton County R-III School District. This page shows the 2026-27 school calendar including first day, last day, breaks, and holidays.
When does school start in Plattsburg?
School in Plattsburg (Clinton County R-III School District) starts on Tuesday, August 25, 2026 for the 2026-27 school year.
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Other Missouri Districts
Last updated: July 13, 2026
Source: Clinton County R-III School District Official Calendar