What is Thermometers?
Fill tubes with liquid, starting at each bulb and continuing along the tube without gaps. Edge clues indicate how many filled cells each row and column must contain.
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Play Thermometers online
Fill the thermometers with liquid so the number of filled cells per row and column matches the clues.
01
Today's Thermometers challenge
Detailed results are kept for the current month and the previous three months. Older puzzles remain playable without new account results or puzzle points. Lifetime progress is preserved.
Calendar
List
October
Mo
Tu
We
Th
Fr
Sa
Su
| Date | Difficulty | Status |
|---|---|---|
| 27 October 2026 | Easy | Not played |
| 26 October 2026 | Easy | Not played |
| 25 October 2026 | Hard | Not played |
| 24 October 2026 | Hard | Not played |
| 23 October 2026 | Hard | Not played |
| 22 October 2026 | Medium | Not played |
| 21 October 2026 | Medium | Not played |
| 20 October 2026 | Easy | Not played |
| 19 October 2026 | Easy | Not played |
| 18 October 2026 | Hard | Not played |
| 17 October 2026 | Hard | Not played |
| 16 October 2026 | Hard | Not played |
| 15 October 2026 | Medium | Not played |
| 14 October 2026 | Medium | Not played |
| 13 October 2026 | Easy | Not played |
| 12 October 2026 | Easy | Not played |
| 11 October 2026 | Hard | Not played |
| 10 October 2026 | Hard | Not played |
| 9 October 2026 | Hard | Not played |
| 8 October 2026 | Medium | Not played |
| 7 October 2026 | Medium | Not played |
| 6 October 2026 | Easy | Not played |
| 5 October 2026 | Easy | Not played |
| 4 October 2026 | Hard | Not played |
| 3 October 2026 | Hard | Not played |
| 2 October 2026 | Hard | Not played |
| 1 October 2026 | Medium | Not played |
| 30 September 2026 | Medium | Not played |
| 29 September 2026 | Easy | Not played |
| 28 September 2026 | Easy | Not played |
| 27 September 2026 | Hard | Not played |
| 26 September 2026 | Hard | Not played |
| 25 September 2026 | Hard | Not played |
| 24 September 2026 | Medium | Not played |
| 23 September 2026 | Medium | Not played |
| 22 September 2026 | Easy | Not played |
| 21 September 2026 | Easy | Not played |
| 20 September 2026 | Hard | Not played |
| 19 September 2026 | Hard | Not played |
| 18 September 2026 | Hard | Not played |
| 17 September 2026 | Medium | Not played |
| 16 September 2026 | Medium | Not played |
| 15 September 2026 | Easy | Not played |
| 14 September 2026 | Easy | Not played |
| 13 September 2026 | Hard | Not played |
| 12 September 2026 | Hard | Not played |
| 11 September 2026 | Hard | Not played |
| 10 September 2026 | Medium | Not played |
| 9 September 2026 | Medium | Not played |
| 8 September 2026 | Easy | Not played |
Completed on time
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Today's challenge
Easy27 October 2026 • Not played
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02
Our puzzle books
03
Everything you need to know about Thermometers
Learn the rules and try a practical solving tip.
Rules
- Fill each thermometer from its bulb along the tube. No gaps may separate a filled cell from the bulb.
- The filled-cell count in each row must match its clue.
- The filled-cell count in each column must match its clue.
- Click a cell to fill up to it. Click the last filled cell again to empty it.
Tips
Tip: A row with a target of 0 must be empty. If a cell further along a tube is filled, every cell between it and the bulb must also be filled.