U.S. Frost Dates by Weather Station

NOAA station USC00342912 · Oklahoma

Frost Dates for Enid, OK

NOAA weather station Enid (USC00342912), Oklahoma · elevation 1245 ft (380 m) · hardiness zone 7a*

  • Lower-risk planting dateafter April 21only 1 spring in 10 still has a frost later
  • Typical last frostApril 650% chance of a frost after it
  • Typical first fall frostNovember 150% chance of a frost before it
  • Frost-free season209 daystypical year, 32°F
  • Hardiness zone7acalculated*

The year at a glance

Frost season at Enid, OKSpring: a frost after March 20 in 9 years out of 10, after April 6 in half of the years, after April 21 in 1 year out of 10. Fall: the first frost comes before October 21 in 1 year out of 10, before November 1 in half of the years, before November 15 in 9 years out of 10. Typical frost-free season: 209 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 6First frost ~Nov 1Frost season at Enid, OKSpring: a frost after March 20 in 9 years out of 10, after April 6 in half of the years, after April 21 in 1 year out of 10. Fall: the first frost comes before October 21 in 1 year out of 10, before November 1 in half of the years, before November 15 in 9 years out of 10. Typical frost-free season: 209 days.JFMAMJJASONDLast frost ~Apr 6First frost ~Nov 1
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 28 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)April 21October 21
50% (typical)April 6November 1
90% (likely)March 20November 15
Frost-free season (32°F, 50% chance)
209 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 5 (1 day earlier than the 30-year normal), typical first fall frost November 2 (1 day later). Frost-free season 213 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 Enid: chance of a frost after this dateSpring, chance of a frost after the date: 10% April 21, 20% April 17, 30% April 12, 40% April 9, 50% April 6, 60% April 2, 70% March 31, 80% March 26, 90% March 20. Observed last spring frost in recent years: 2021 April 22, 2022 April 14, 2025 April 7.Spring: last frostChance of a frost after this date10%50%90%Apr 1May 1Apr 21Apr 6Mar 202021: April 222022: April 142025: April 7Fall at Enid: chance of a frost before this dateFall, chance of a frost before the date: 10% October 21, 20% October 24, 30% October 27, 40% October 29, 50% November 1, 60% November 4, 70% November 6, 80% November 10, 90% November 15. Observed first fall frost in recent years: 2021 November 13, 2022 October 19, 2025 November 10.Fall: first frostChance of a frost before this date10%50%90%Nov 1Oct 21Nov 1Nov 152021: November 132022: October 192025: November 10
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 22November 13
2022April 14October 19
2023incomplete recordno data
2024no dataincomplete record
2025April 7November 10
2026incomplete recordseason not over yet

What these dates mean

April 21 is the cautious spring date for Enid, and it gives a gardener a clear point after which setting out tender crops carries only a 10 % chance of a light frost. The 50% light-frost date of April 6 marks the moment when a frost later in spring is as likely as not, while the 50% hard-frost date of March 26 indicates an even chance of a 28 °F event later in the season. In fall, October 21 serves as the cautious date to finish harvesting tender crops, with only a 10 % chance that a light frost has already arrived. The 50% light-frost date of November 1 and the 50% hard-frost date of November 10 each represent the point where a frost earlier in the season is equally probable.

Hard frost at 28 °F can injure plants that would survive a light frost at 32 °F, making its timing especially important.

How to read the probabilities

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

  • Spring: "10% after April 21" 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 21" 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 Enid, OKNumbered nearest stations: 1 — Helena, OK — 23 mi; 2 — Billings, OK — 25 mi; 3 — Ponca City, OK — 48 mi; 4 — Watonga, OK — 49 mi; 5 — Anthony, KS — 52 mi.KS25 mi · 40 km1. Helena, OK — 23 mi12. Billings, OK — 25 mi23. Ponca City, OK — 48 mi34. Watonga, OK — 49 mi45. Anthony, KS — 52 mi5
  1. Helena, OK 23 mi (37 km)
  2. Billings, OK 25 mi (40 km)
  3. Ponca City, OK 48 mi (78 km)
  4. Watonga, OK 49 mi (79 km)
  5. Anthony, KS 52 mi (83 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: 36.4194, -97.8747.