U.S. Frost Dates by Weather Station

NOAA station USW00014825 · Ohio

Frost Dates for Findlay, OH

NOAA weather station Findlay Airport (USW00014825), Ohio · elevation 800 ft (244 m) · hardiness zone 6b*

  • Lower-risk planting dateafter May 6only 1 spring in 10 still has a frost later
  • Typical last frostApril 1950% chance of a frost after it
  • Typical first fall frostOctober 2350% chance of a frost before it
  • Frost-free season185 daystypical year, 32°F
  • Hardiness zone6bcalculated*

The year at a glance

Frost season at Findlay, OHSpring: a frost after April 5 in 9 years out of 10, after April 19 in half of the years, after May 6 in 1 year out of 10. Fall: the first frost comes before October 9 in 1 year out of 10, before October 23 in half of the years, before November 4 in 9 years out of 10. Typical frost-free season: 185 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 19First frost ~Oct 23Frost season at Findlay, OHSpring: a frost after April 5 in 9 years out of 10, after April 19 in half of the years, after May 6 in 1 year out of 10. Fall: the first frost comes before October 9 in 1 year out of 10, before October 23 in half of the years, before November 4 in 9 years out of 10. Typical frost-free season: 185 days.JFMAMJJASONDLast frost ~Apr 19First frost ~Oct 23
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 30 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)May 6October 9
50% (typical)April 19October 23
90% (likely)April 5November 4
Frost-free season (32°F, 50% chance)
185 days
Hard frost (28°F), last in spring, 50% chance after
April 8
Hard frost (28°F), first in fall, 50% chance before
November 3

The last 15 years (2006–2020 normals)

Typical last frost April 20 (1 day later than the 30-year normal), typical first fall frost October 25 (2 days later). Frost-free season 187 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 Findlay: chance of a frost after this dateSpring, chance of a frost after the date: 10% May 6, 20% April 30, 30% April 26, 40% April 22, 50% April 19, 60% April 17, 70% April 14, 80% April 10, 90% April 5. Observed last spring frost in recent years: 2021 May 1, 2022 April 27, 2023 April 26, 2024 April 6, 2025 April 17, 2026 May 3.Spring: last frostChance of a frost after this date10%50%90%Apr 1May 1May 6Apr 19Apr 52021: May 12022: April 272023: April 262024: April 62025: April 172026: May 3Fall at Findlay: chance of a frost before this dateFall, chance of a frost before the date: 10% October 9, 20% October 14, 30% October 17, 40% October 20, 50% October 23, 60% October 25, 70% October 28, 80% October 31, 90% November 4. Observed first fall frost in recent years: 2021 November 3, 2022 October 8, 2023 October 30, 2024 October 17.Fall: first frostChance of a frost before this date10%50%90%Oct 1Nov 1Oct 9Oct 23Nov 42021: November 32022: October 82023: October 302024: October 17
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 1November 3
2022April 27October 8
2023April 26October 30
2024April 6October 17
2025April 17incomplete record
2026May 3season not over yet

What these dates mean

May 6 is the cautious spring date for light frost in Findlay, with a 10 % chance that a frost will occur later; it gives a gardener a reliable point to set out tender crops. The 50 % dates—April 19 in spring and October 23 in fall—mark the median when a light frost has an even chance of occurring later (spring) or earlier (fall). The hard-frost median dates are April 8 and November 3; that lower temperature can kill tissue that would survive a light frost, making it a greater threat to tender crops. October 9 is the cautious fall date, with only a 10 % chance a light frost has arrived earlier, serving as a deadline for finishing tender-crop harvests. The 30-year record shows 185 days between the two 32 °F 50 % dates, illustrating the length of the period between median light-frost odds.

How to read the probabilities

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

  • Spring: "10% after May 6" 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 9" 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 Findlay, OHNumbered nearest stations: 1 — Findlay WPCC, OH — 2 mi; 2 — Pandora, OH — 16 mi; 3 — Bowling Green, OH — 26 mi; 4 — Lima, OH — 31 mi; 5 — Bucyrus, OH — 39 mi.25 mi · 40 km1. Findlay WPCC, OH — 2 mi12. Pandora, OH — 16 mi23. Bowling Green, OH — 26 mi34. Lima, OH — 31 mi45. Bucyrus, OH — 39 mi5
  1. Findlay WPCC, OH 2 mi (4 km)
  2. Pandora, OH 16 mi (26 km)
  3. Bowling Green, OH 26 mi (41 km)
  4. Lima, OH 31 mi (50 km)
  5. Bucyrus, OH 39 mi (63 km)

Sources

* Hardiness zone 6b: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 41.0136, -83.6686.