U.S. Frost Dates by Weather Station

NOAA station USC00345468 · Oklahoma

Frost Dates for Madill, OK

NOAA weather station Madill (USC00345468), Oklahoma · elevation 770 ft (235 m) · hardiness zone 8a*

  • Lower-risk planting dateafter April 14only 1 spring in 10 still has a frost later
  • Typical last frostMarch 2750% chance of a frost after it
  • Typical first fall frostNovember 850% chance of a frost before it
  • Frost-free season227 daystypical year, 32°F
  • Hardiness zone8acalculated*

The year at a glance

Frost season at Madill, OKSpring: a frost after March 7 in 9 years out of 10, after March 27 in half of the years, after April 14 in 1 year out of 10. Fall: the first frost comes before October 25 in 1 year out of 10, before November 8 in half of the years, before November 25 in 9 years out of 10. Typical frost-free season: 227 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Mar 27First frost ~Nov 8Frost season at Madill, OKSpring: a frost after March 7 in 9 years out of 10, after March 27 in half of the years, after April 14 in 1 year out of 10. Fall: the first frost comes before October 25 in 1 year out of 10, before November 8 in half of the years, before November 25 in 9 years out of 10. Typical frost-free season: 227 days.JFMAMJJASONDLast frost ~Mar 27First frost ~Nov 8
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 27 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)April 14October 25
50% (typical)March 27November 8
90% (likely)March 7November 25
Frost-free season (32°F, 50% chance)
227 days
Hard frost (28°F), last in spring, 50% chance after
March 11
Hard frost (28°F), first in fall, 50% chance before
November 19

The last 15 years (2006–2020 normals)

Typical last frost March 22 (5 days earlier than the 30-year normal), typical first fall frost November 10 (2 days later). Frost-free season 233 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 Madill: chance of a frost after this dateSpring, chance of a frost after the date: 10% April 14, 20% April 6, 30% April 2, 40% March 30, 50% March 27, 60% March 22, 70% March 19, 80% March 14, 90% March 7.Spring: last frostChance of a frost after this date10%50%90%Mar 1Apr 1Apr 14Mar 27Mar 7Fall at Madill: chance of a frost before this dateFall, chance of a frost before the date: 10% October 25, 20% October 31, 30% November 2, 40% November 5, 50% November 8, 60% November 11, 70% November 15, 80% November 20, 90% November 25.Fall: first frostChance of a frost before this date10%50%90%Nov 1Dec 1Oct 25Nov 8Nov 25
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.

What these dates mean

Setting out tender crops on March 7 carries a 90% chance of a light frost, so it is a gamble for gardeners in Madill.

The 50% date for light frost in spring is March 27, indicating a 50% chance of a frost later than this date. In fall, the 50% date is November 8, indicating a 50% chance of a frost earlier than this date. The 50% hard-frost dates are March 11 and November 19, marking the points at which a 28 °F frost is equally likely to have occurred.

For a cautious planting schedule, the spring date to set out tender crops is April 14, while the fall date to finish harvesting them is October 25. A hard frost matters more than a light frost because the lower temperature of 28 °F can damage or kill plants that survive 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 14" 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 25" 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 Madill, OKNumbered nearest stations: 1 — Sherman, TX — 28 mi; 2 — Gainesville, TX — 35 mi; 3 — Healdton, OK — 38 mi; 4 — Denton, TX — 65 mi; 5 — Antlers, OK — 67 mi.TXOK25 mi · 40 km1. Sherman, TX — 28 mi12. Gainesville, TX — 35 mi23. Healdton, OK — 38 mi34. Denton, TX — 65 mi45. Antlers, OK — 67 mi5
  1. Sherman, TX 28 mi (45 km)
  2. Gainesville, TX 35 mi (56 km)
  3. Healdton, OK 38 mi (62 km)
  4. Denton, TX 65 mi (104 km)
  5. Antlers, OK 67 mi (107 km)

Sources

* Hardiness zone 8a: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 34.0919, -96.7708.