Frost Date Calculator

How It Works

Frost dates are averages based on decades of weather records, so they vary year to year. Think of them as guidelines, not guarantees. Many experienced gardeners wait one to two weeks past the average last frost before setting out tender plants like tomatoes, just to be safe. A late frost can wipe out transplants overnight. On the other end, your first fall frost signals when to harvest warm-season crops or cover them with frost cloth. Knowing these dates helps you plan every planting decision for the year.