U.S. Frost Dates by Weather Station

NOAA station USC00236460 · Missouri

Frost Dates for Ozark Beach, MO

NOAA weather station Ozark Beach (USC00236460), Missouri · elevation 834 ft (254 m) · hardiness zone 7a*

  • Lower-risk planting dateafter April 22only 1 spring in 10 still has a frost later
  • Typical last frostApril 650% chance of a frost after it
  • Typical first fall frostOctober 3150% chance of a frost before it
  • Frost-free season205 daystypical year, 32°F
  • Hardiness zone7acalculated*

The year at a glance

Frost season at Ozark Beach, MOSpring: a frost after March 23 in 9 years out of 10, after April 6 in half of the years, after April 22 in 1 year out of 10. Fall: the first frost comes before October 17 in 1 year out of 10, before October 31 in half of the years, before November 15 in 9 years out of 10. Typical frost-free season: 205 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 6First frost ~Oct 31Frost season at Ozark Beach, MOSpring: a frost after March 23 in 9 years out of 10, after April 6 in half of the years, after April 22 in 1 year out of 10. Fall: the first frost comes before October 17 in 1 year out of 10, before October 31 in half of the years, before November 15 in 9 years out of 10. Typical frost-free season: 205 days.JFMAMJJASONDLast frost ~Apr 6First frost ~Oct 31
frost likely chance fading 90% → 10% frost-free in a typical yearThe year at a glance. Blue: frost is likely; the gradient fades as the chance drops from 90% to 10%; green: the frost-free part of a typical year.Today

Frost dates (32°F)

Probability of frost, based on 27 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)April 22October 17
50% (typical)April 6October 31
90% (likely)March 23November 15
Frost-free season (32°F, 50% chance)
205 days
Hard frost (28°F), last in spring, 50% chance after
March 26
Hard frost (28°F), first in fall, 50% chance before
November 10

The last 15 years (2006–2020 normals)

Typical last frost April 6 (same as the 30-year normal), typical first fall frost October 31. Frost-free season 207 days.

A shorter, more recent NOAA period. The 30-year normals above remain the main reference: 15 years carry more year-to-year noise.

Add these dates to your calendar Yearly reminders for the typical last frost, the lower-risk planting date and the typical first fall frost (.ics).

How the chance of frost changes with the date

Spring at Ozark Beach: chance of a frost after this dateSpring, chance of a frost after the date: 10% April 22, 20% April 17, 30% April 12, 40% April 9, 50% April 6, 60% April 4, 70% April 1, 80% March 29, 90% March 23. Observed last spring frost in recent years: 2021 May 14, 2022 April 19, 2023 April 24, 2024 April 22, 2025 April 17, 2026 April 19.Spring: last frostChance of a frost after this date10%50%90%Apr 1May 1Apr 22Apr 6Mar 232021: May 142022: April 192023: April 242024: April 222025: April 172026: April 19Fall at Ozark Beach: chance of a frost before this dateFall, chance of a frost before the date: 10% October 17, 20% October 22, 30% October 25, 40% October 29, 50% October 31, 60% November 1, 70% November 4, 80% November 9, 90% November 15. Observed first fall frost in recent years: 2021 November 5, 2022 October 18, 2023 October 30, 2024 October 16, 2025 November 1.Fall: first frostChance of a frost before this date10%50%90%Nov 1Oct 17Oct 31Nov 152021: November 52022: October 182023: October 302024: October 162025: November 1
Two charts, because spring and fall answer different questions: in spring, the chance that a frost still comes after a date; in fall, the chance that the first frost has already come before it. NOAA publishes these odds from 10% to 90%, so the lines stop there. ◆ marks the actual date in each recent year.

What actually happened in recent years

Observed dates of the last spring and first fall frost (32°F) at this station; ◆ marks them on the charts above
YearLast spring frostFirst fall frost
2021May 14November 5
2022April 19October 18
2023April 24October 30
2024April 22October 16
2025April 17November 1
2026April 19season not over yet

What these dates mean

Setting out tender crops on March 23 in Ozark Beach is a gamble, because there is a 90% chance of a light frost later than that date. For a cautious plan, the spring light-frost date of April 22 carries only a 10% chance of a frost later, making it the preferred day to expose tender seedlings.

The 50% date is April 6, a 50% chance of a light frost later than this date, while the 50% date is October 31, a 50% chance of a light frost earlier than this date. In the fall, October 17 is the cautious date, with only a 10% chance that a light frost has arrived earlier. The hard-frost 50% dates are March 26 and November 10; a hard frost at 28 °F can damage plants more severely than a light frost at 32 °F.

How to read the probabilities

The dates are probabilities from 30 years of weather, not a forecast for this year.

  • Spring: "10% after April 22" means that in about one spring out of ten a frost still happens after that date. The 90% date is the earliest: a frost after it happens in most years.
  • Fall: "10% before October 17" means that in about one fall out of ten the first frost arrives before that date.
  • 50% is the typical date: half of the years are earlier, half are later.
  • A light frost (32°F) damages tender plants; a hard frost (28°F) also stops most hardy vegetables.

Nearby weather stations

Map of weather stations near Ozark Beach, MONumbered nearest stations: 1 — Lead Hill, AR — 21 mi; 2 — Harrison, AR — 28 mi; 3 — Billings, MO — 37 mi; 4 — Mansfield, MO — 42 mi; 5 — Springfield, MO — 42 mi.MO25 mi · 40 km1. Lead Hill, AR — 21 mi12. Harrison, AR — 28 mi23. Billings, MO — 37 mi34. Mansfield, MO — 42 mi45. Springfield, MO — 42 mi5
  1. Lead Hill, AR 21 mi (33 km)
  2. Harrison, AR 28 mi (46 km)
  3. Billings, MO 37 mi (59 km)
  4. Mansfield, MO 42 mi (67 km)
  5. Springfield, MO 42 mi (68 km)

Sources

* Hardiness zone 7a: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 36.6744, -93.1075.