Home / Coppell / Gardening planner
Coppell gardening & growing season
Average frost window, growing season length, and growing degree days, from United States's hourly ERA5 archive.
Data last updated: 31 December 2025
Growing season
292 days
Typically February 24 to December 12
Frost days per year
22.6
Average days per year with a minimum at or below 0°C.
Growing degree days
7289.7
Accumulated heat units per year above 0°C base — higher means faster crop development.
Averaged across 5 recent years on file (2021–2025), not the full archive — a deliberate cost/precision tradeoff, same reasoning as the site's other multi-year summaries. "Growing season" is the longest run of days with a daily average temperature at or above 5°C; dates are approximate, averaged across those years rather than tied to one specific year.