Thermometer Sudoku
The rule: Along each thermometer, digits increase from the bulb.
Play unlimited Thermometer puzzles free — every one generated with a unique solution, rated by the solving techniques it actually needs.
- Four difficulties, from gentle to expert
- Step-by-step hints that teach, not just tell
- Interactive lessons and a daily race
- Make and share your own puzzles
Thermometer sudoku puzzles in the library
- Easy Gradient — Sudoku·AD
- Easy Slow Boil — Sudoku·AD
- Soft Fever — Sudoku·AD
- Mercury Rising — Sudoku·AD
- Just Warm — Sudoku·AD
- Fair Gradient — Sudoku·AD
- Fair Rising — Sudoku·AD
- Middle Climb — Sudoku·AD
- Middle Thermals — Sudoku·AD
- Middle Fever — Sudoku·AD
- Middle Ascent — Sudoku·AD
- Middle Mercury — Sudoku·AD
- Middle Slow Boil — Sudoku·AD
- Middle Warm Front — Sudoku·AD
- Middle Gradient — Sudoku·AD
- Middle Rising — Sudoku·AD
- Steady Climb — Sudoku·AD
- Steady Thermals — Sudoku·AD
- Steady Fever — Sudoku·AD
- Steady Ascent — Sudoku·AD
- Steady Mercury — Sudoku·AD
- Steady Slow Boil — Sudoku·AD
- Steady Warm Front — Sudoku·AD
- Steady Gradient — Sudoku·AD
- Steady Rising — Sudoku·AD
- Easy Fever — Sudoku·AD
- Easy Ascent — Sudoku·AD
- Easy Mercury — Sudoku·AD
- Easy Warm Front — Sudoku·AD
- Easy Rising — Sudoku·AD
- Soft Climb — Sudoku·AD
- Soft Thermals — Sudoku·AD
- Soft Ascent — Sudoku·AD
- Soft Mercury — Sudoku·AD
- Soft Slow Boil — Sudoku·AD
- Soft Warm Front — Sudoku·AD
- Soft Gradient — Sudoku·AD
- Soft Rising — Sudoku·AD
- Gentle Climb — Sudoku·AD
- Gentle Thermals — Sudoku·AD