U.S. Frost Dates by Weather Station

NOAA station USC00127959 · Indiana

Frost Dates near Jasonville, IN

NOAA weather station Shakamak State Park (USC00127959), Indiana · elevation 549 ft (167 m) · hardiness zone 6a*

Jasonville is the nearest town to the station (2.4 mi away) in GeoNames (CC BY 4.0). The dates below are measured at the station, not in the town itself.

  • Lower-risk planting dateafter May 1only 1 spring in 10 still has a frost later
  • Typical last frostApril 1450% chance of a frost after it
  • Typical first fall frostOctober 2650% chance of a frost before it
  • Frost-free season193 daystypical year, 32°F
  • Hardiness zone6acalculated*

The year at a glance

Frost season near Jasonville, INSpring: a frost after March 31 in 9 years out of 10, after April 14 in half of the years, after May 1 in 1 year out of 10. Fall: the first frost comes before October 12 in 1 year out of 10, before October 26 in half of the years, before November 6 in 9 years out of 10. Typical frost-free season: 193 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 14First frost ~Oct 26Frost season near Jasonville, INSpring: a frost after March 31 in 9 years out of 10, after April 14 in half of the years, after May 1 in 1 year out of 10. Fall: the first frost comes before October 12 in 1 year out of 10, before October 26 in half of the years, before November 6 in 9 years out of 10. Typical frost-free season: 193 days.JFMAMJJASONDLast frost ~Apr 14First frost ~Oct 26
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 26 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)May 1October 12
50% (typical)April 14October 26
90% (likely)March 31November 6
Frost-free season (32°F, 50% chance)
193 days
Hard frost (28°F), last in spring, 50% chance after
April 1
Hard frost (28°F), first in fall, 50% chance before
November 3

The last 15 years (2006–2020 normals)

Typical last frost April 12 (2 days earlier than the 30-year normal), typical first fall frost October 28 (2 days later). Frost-free season 197 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 near Jasonville: chance of a frost after this dateSpring, chance of a frost after the date: 10% May 1, 20% April 24, 30% April 20, 40% April 16, 50% April 14, 60% April 10, 70% April 8, 80% April 4, 90% March 31. Observed last spring frost in recent years: 2022 April 19, 2023 April 25, 2024 April 7, 2025 April 13.Spring: last frostChance of a frost after this date10%50%90%Apr 1May 1May 1Apr 14Mar 312022: April 192023: April 252024: April 72025: April 13Fall near Jasonville: chance of a frost before this dateFall, chance of a frost before the date: 10% October 12, 20% October 17, 30% October 21, 40% October 23, 50% October 26, 60% October 28, 70% October 30, 80% November 2, 90% November 6. Observed first fall frost in recent years: 2022 October 19, 2023 October 31, 2024 October 18, 2025 November 10.Fall: first frostChance of a frost before this date10%50%90%Oct 1Nov 1Oct 12Oct 26Nov 62022: October 192023: October 312024: October 182025: 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
2021incomplete recordincomplete record
2022April 19October 19
2023April 25October 31
2024April 7October 18
2025April 13November 10
2026no dataseason not over yet

What these dates mean

May 1 is the cautious spring date with a 10 % chance of a light frost later, allowing a gardener in the Jasonville area to set out tender crops with low risk.

April 14 is the 50% date for light frost, indicating an even chance of a frost occurring; October 26 is the 50% date for fall, also indicating an even chance. The 50% hard-frost dates are April 1 in spring and November 3 in fall, marking the median point for a frost at 28 °F.

October 12 is the cautious fall date with a 10 % chance of a light frost earlier, providing a low-risk point to finish harvesting tender crops. Hard frost at 28 °F can damage plants that survive a light frost at 32 °F, so it represents a greater risk.

How to read the probabilities

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

  • Spring: "10% after May 1" 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 12" 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 Jasonville, INNumbered nearest stations: 1 — Spencer, IN — 27 mi; 2 — Vincennes, IN — 32 mi; 3 — near Bloomington, IN — 39 mi; 4 — near Paris, IL — 39 mi; 5 — near Oolitic, IN — 42 mi.IL25 mi · 40 km1. Spencer, IN — 27 mi12. Vincennes, IN — 32 mi23. near Bloomington, IN — 39 mi34. near Paris, IL — 39 mi45. near Oolitic, IN — 42 mi5
  1. Spencer, IN 27 mi (43 km)
  2. Vincennes, IN 32 mi (52 km)
  3. near Bloomington, IN 39 mi (62 km)
  4. near Paris, IL 39 mi (63 km)
  5. near Oolitic, IN 42 mi (67 km)

Sources

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

Station coordinates: 39.1614, -87.2436.