Missouri Frost Dates
Published: February 1, 2026 · Updated: April 23, 2026
Last Spring Frost
March 22
Zone 6b
First Fall Frost
November 10
Zone 6b
Frost-Free Season
233 days
Late March to Late November
Lawn Care Timing for Missouri
Vegetable Garden Timing for Missouri
Frost Dates by City in Missouri
Frequently Asked Questions
What is the last frost date in Missouri?
The average last spring frost in Missouri (zone 6b) is March 22. Dates vary by city and elevation. Find your specific city below for exact dates.
When is it safe to plant tomatoes in Missouri?
Transplant tomato seedlings outdoors after March 22 — the average last frost date for zone 6b. Start seeds indoors Early January. Wait 2 weeks after last frost for extra safety.
When should I overseed my lawn in Missouri?
The prime overseeding window in Missouri is September 1–October 15. This ensures 6 weeks of warm soil for germination before the first fall frost on November 10.
When should I apply winteriser in Missouri?
Apply winteriser fertiliser by Late November. Your first fall frost of November 10 is the hard deadline — apply at least 2–3 weeks before.
What USDA zone is Missouri?
Missouri contains USDA zones 6a, 6b. Each zone has different frost dates and growing seasons. Find your city below for your specific zone.