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School Open
Dismissal: 3:30 PM
Next 7 Days
May 2026
Coming Up
School Breaks
Holidays (No School)
The St. Clair R-XIII School District school calendar for the 2025-26 school year runs from Monday, August 18, 2025 to Thursday, May 21, 2026 in Lake St. Clair, Missouri.
- •3 scheduled breaks and 4 holidays throughout the year
- •Spring break: Mar 30 – Apr 6
- •Winter break: Dec 22 – Jan 2
St. Clair R-XIII School District starts school 7 days later than most Missouri districts. Winter break matches the most common Missouri schedule, starting 12/22.
Download the iCal file above to sync all St. Clair R-XIII School District dates with your phone or computer.
Frequently Asked Questions
Is St. Clair R-XIII School District school open today?
Yes, St. Clair R-XIII School District is open today. Check the weekly calendar above for upcoming school days and closures.
When is the next day off for St. Clair R-XIII School District?
The next day off is Monday, May 25, 2026 for Memorial Day.
When is the first day of school for St. Clair R-XIII School District?
The first day of school for St. Clair R-XIII School District in 2025-26 is Monday, August 18, 2025.
When is the last day of school for St. Clair R-XIII School District?
The last day of school for St. Clair R-XIII School District in 2025-26 is Thursday, May 21, 2026.
When is spring break for St. Clair R-XIII School District?
Spring break for St. Clair R-XIII School District is Monday, March 30, 2026 to Monday, April 6, 2026.
When is winter break for St. Clair R-XIII School District?
Winter break for St. Clair R-XIII School District is Monday, December 22, 2025 to Friday, January 2, 2026.
When do students go back to school after winter break?
Students in St. Clair R-XIII School District return to school after winter break on Monday, January 5, 2026. Winter break ends on Friday, January 2, 2026.
When is Thanksgiving break for St. Clair R-XIII School District?
Thanksgiving break for St. Clair R-XIII School District is Monday, November 24, 2025 to Friday, November 28, 2025.
How do I add St. Clair R-XIII 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 Lake St. Clair, MO in?
Lake St. Clair, Missouri is served by St. Clair R-XIII School District. This page shows the 2025-26 school calendar including first day, last day, breaks, and holidays.
When does school start in Lake St. Clair?
School in Lake St. Clair (St. Clair R-XIII School District) starts on Monday, August 18, 2025 for the 2025-26 school year.
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Last updated: December 31, 2025