U.S. Frost Dates by Weather Station

NOAA station USC00235307 · Missouri

Frost Dates for Marshfield, MO

NOAA weather station Marshfield 4 WSW (USC00235307), Missouri · elevation 1414 ft (431 m) · hardiness zone 7a*

  • Lower-risk planting dateafter April 29only 1 spring in 10 still has a frost later
  • Typical last frostApril 1350% chance of a frost after it
  • Typical first fall frostOctober 2450% chance of a frost before it
  • Frost-free season191 daystypical year, 32°F
  • Hardiness zone7acalculated*

The year at a glance

Frost season at Marshfield, MOSpring: a frost after March 29 in 9 years out of 10, after April 13 in half of the years, after April 29 in 1 year out of 10. Fall: the first frost comes before October 8 in 1 year out of 10, before October 24 in half of the years, before November 6 in 9 years out of 10. Typical frost-free season: 191 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 13First frost ~Oct 24Frost season at Marshfield, MOSpring: a frost after March 29 in 9 years out of 10, after April 13 in half of the years, after April 29 in 1 year out of 10. Fall: the first frost comes before October 8 in 1 year out of 10, before October 24 in half of the years, before November 6 in 9 years out of 10. Typical frost-free season: 191 days.JFMAMJJASONDLast frost ~Apr 13First frost ~Oct 24
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.

Frost dates (32°F)

Probability of frost, based on 29 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)April 29October 8
50% (typical)April 13October 24
90% (likely)March 29November 6
Frost-free season (32°F, 50% chance)
191 days
Hard frost (28°F), last in spring, 50% chance after
April 1
Hard frost (28°F), first in fall, 50% chance before
November 2

The last 15 years (2006–2020 normals)

Typical last frost April 11 (2 days earlier than the 30-year normal), typical first fall frost October 26 (2 days later). Frost-free season 195 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 Marshfield: chance of a frost after this dateSpring, chance of a frost after the date: 10% April 29, 20% April 24, 30% April 20, 40% April 16, 50% April 13, 60% April 9, 70% April 5, 80% April 2, 90% March 29. Observed last spring frost in recent years: 2021 April 23, 2022 April 19, 2023 April 24, 2024 April 5, 2025 April 9, 2026 March 28.Spring: last frostChance of a frost after this date10%50%90%Apr 1May 1Apr 29Apr 13Mar 292021: April 232022: April 192023: April 242024: April 52025: April 92026: March 28Fall at Marshfield: chance of a frost before this dateFall, chance of a frost before the date: 10% October 8, 20% October 14, 30% October 18, 40% October 22, 50% October 24, 60% October 27, 70% October 30, 80% November 1, 90% November 6. Observed first fall frost in recent years: 2021 November 4, 2022 October 18, 2023 October 30, 2024 October 16, 2025 November 2.Fall: first frostChance of a frost before this date10%50%90%Oct 1Nov 1Oct 8Oct 24Nov 62021: November 42022: October 182023: October 302024: October 162025: November 2
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
2021April 23November 4
2022April 19October 18
2023April 24October 30
2024April 5October 16
2025April 9November 2
2026March 28season not over yet

What these dates mean

October 8 is the cautious fall date in Marshfield for finishing the harvest, as there is only a 10 % chance a light frost has arrived earlier. The 50% dates give a clear midpoint: April 13 marks a 50 % chance of a frost later than this date, and October 24 marks a 50 % chance of a frost earlier than this date. The hard-frost median dates are April 1 and November 2, indicating the points at which a 28 °F frost is equally likely to have occurred or not.

For a cautious planting schedule, tender crops are best set out after the April 29 light-frost cautious date in spring, while they should be harvested by the October 8 cautious date in fall. The early spring date of March 29 carries a 90 % chance of frost and is a gamble, and the late fall date of November 6 carries a 90 % chance of frost.

A hard frost at 28 °F can damage plants that survive a light frost at 32 °F, making it a more critical threshold.

How to read the probabilities

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

  • Spring: "10% after April 29" 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 8" 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 Marshfield, MONumbered nearest stations: 1 — Springfield, MO — 24 mi; 2 — Mansfield, MO — 27 mi; 3 — Lebanon, MO — 30 mi; 4 — Bolivar, MO — 30 mi; 5 — Billings, MO — 38 mi.25 mi · 40 km1. Springfield, MO — 24 mi12. Mansfield, MO — 27 mi23. Lebanon, MO — 30 mi34. Bolivar, MO — 30 mi45. Billings, MO — 38 mi5
  1. Springfield, MO 24 mi (38 km)
  2. Mansfield, MO 27 mi (43 km)
  3. Lebanon, MO 30 mi (48 km)
  4. Bolivar, MO 30 mi (49 km)
  5. Billings, MO 38 mi (60 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: 37.3233, -92.9828.