Is There School?
The school on a fall morning, orange and red trees, children walking in and a school bus out front

Thornton High School

High · Thornton · Adams 12

Today’s school day is over. Next school day: Monday.

MondayNov 16

Open

On the calendar.

Starts7:40 AM
Dismissal3:10 PM
  1. Mon Nov 16 Open
  2. Tue Nov 17 Open
  3. Wed Nov 18 Open
  4. Thu Nov 19 Open
  5. Fri Nov 20 Open

Snow days and delays for Adams 12 are posted here by hand when we can, not every time. Always check adams12.org.

Coming up

  1. Nov23 Thanksgiving breakNov 21–29 · Back Monday, Nov 30 In 10 days
  2. Dec18 Winter breakDec 18 – Jan 4 · Back Tuesday, Jan 5 In 35 days
  3. Jan18 Martin Luther King Jr. DayJan 16–18 · 3-day weekend · Back Tuesday, Jan 19 In 66 days
  4. Feb15 Presidents' Day & Staff workdayFeb 13–16 · 4-day weekend · Back Wednesday, Feb 17 In 94 days

Lunch menu for Monday

Adams 12 menus are on SchoolCafé.

Full Adams 12 menus

Bell schedule

Regular day7:40 AM – 3:10 PM
Late start (Wednesdays)Starts 8:35 AM
Delayed startStarts 8:40 AM

From the official Adams 12 bell schedule, 2026–27 · Every Adams 12 school’s bell schedule

Nearby schools

About Thornton High School

Thornton High School is an Adams 12 public high school in Thornton, CO. Classes start at 7:40 AM and students are dismissed at 3:10 PM. On a delayed start, school starts at 8:40 AM.

Days off come from the Adams 12 calendar. Adams 12 doesn’t publish closings anywhere the site can read them, so snow days and delays for Adams 12 are posted here by hand when we can, not every time. In bad weather, always check adams12.org.

Questions about Thornton High

Is school cancelled at Thornton High today?

Today’s school day is over. Thornton High School is open Monday on a regular schedule, 7:40 AM to 3:10 PM. Snow days and delays for Adams 12 are posted here by hand when we can, not every time: Adams 12 doesn’t publish closings anywhere the site can read them. In bad weather, always check adams12.org.

Is there school tomorrow at Thornton High?

No, tomorrow is Saturday. The strip under the answer at the top of this page shows the rest of the week.

Is there a delayed start at Thornton High?

On a delayed start, Thornton High School starts at 8:40 AM instead of 7:40 AM. Dismissal stays at 3:10 PM.

Is Thornton High closed for a snow day?

There’s no snow day or weather closing posted right now. Today’s school day is over. Thornton High School is open Monday on a regular schedule, 7:40 AM to 3:10 PM. Turn on snow-day alerts on this page to get a notification on your phone if Thornton High closes or opens late (posted by hand when we can, so not every time).

What time does Thornton High start and end?

Thornton High School starts at 7:40 AM and gets out at 3:10 PM on a regular day. That’s from the official Adams 12 bell schedule.

Does Thornton High have a late start?

Yes. Every Wednesday, Thornton High School starts at 8:35 AM instead of 7:40 AM, from its Adams 12 bell schedule. Dismissal stays at 3:10 PM.

When is the next day off at Thornton High?

The next day off is Thanksgiving break, Monday, November 23: 9 days with the weekend. School is back Monday, November 30.