Free crochet tool

Temperature Blanket Generator

A temperature blanket generator assigns a yarn colour to each temperature range and turns a list of daily temperatures into a row-by-row plan. Set your ranges and colours, paste the year’s highs, and it shows the colour for every day plus how many rows each colour needs for yarn buying.

By the crochetpatterns.io editorial team · Reviewed · Editorial policy

Temperature ranges (°)
ColourNameFromToRemove

One per day, separated by commas, spaces or new lines.

Row plan — 20 rows

  • Navy: 1 rows
  • Blue: 4 rows
  • Aqua: 3 rows
  • Green: 3 rows
  • Yellow: 3 rows
  • Orange: 3 rows
  • Red-orange: 2 rows
  • Red: 1 rows
  1. Row 1: 34° — Blue
  2. Row 2: 38° — Blue
  3. Row 3: 41° — Aqua
  4. Row 4: 45° — Aqua
  5. Row 5: 52° — Green
  6. Row 6: 57° — Green
  7. Row 7: 61° — Yellow
  8. Row 8: 66° — Yellow
  9. Row 9: 72° — Orange
  10. Row 10: 78° — Orange
  11. Row 11: 83° — Red-orange
  12. Row 12: 91° — Red
  13. Row 13: 88° — Red-orange
  14. Row 14: 76° — Orange
  15. Row 15: 64° — Yellow
  16. Row 16: 55° — Green
  17. Row 17: 47° — Aqua
  18. Row 18: 39° — Blue
  19. Row 19: 30° — Blue
  20. Row 20: 22° — Navy

Browse blanket patterns →

How do I choose temperature ranges?

Look up your location’s record low and high, then divide that span into 8–12 bands. Ten-degree Fahrenheit or five-degree Celsius bands are common. Narrow bands give more colour changes and more yarn colours to buy.

The generator flags overlapping ranges and gaps, so every temperature lands in exactly one colour. Temperatures are rounded to the nearest whole degree before matching.

How much yarn does each colour need?

Work one test row, measure the yarn it used, then multiply by the rows per colour from the plan. Add a skein for colours that cover more than a month of typical weather.

Frequently asked questions

Should I use daily high or low temperatures?

Most makers use the daily high. Some work two rows per day, one high and one low.

Where can I get daily temperatures?

National weather services publish daily historical data. Paste the values separated by commas, spaces or new lines.

What stitch suits a temperature blanket?

Rows of half double crochet or moss stitch keep each day distinct and the blanket a manageable length.