U.S. Frost Dates by Weather Station

NOAA station USC00188380 · Maryland

Frost Dates for Snow Hill, MD

NOAA weather station Snow Hill 4 N (USC00188380), Maryland · elevation 30 ft (9 m) · hardiness zone 7b*

  • Lower-risk planting dateafter April 28only 1 spring in 10 still has a frost later
  • Typical last frostApril 1050% chance of a frost after it
  • Typical first fall frostOctober 3150% chance of a frost before it
  • Frost-free season202 daystypical year, 32°F
  • Hardiness zone7bcalculated*

The year at a glance

Frost season at Snow Hill, MDSpring: a frost after March 27 in 9 years out of 10, after April 10 in half of the years, after April 28 in 1 year out of 10. Fall: the first frost comes before October 16 in 1 year out of 10, before October 31 in half of the years, before November 14 in 9 years out of 10. Typical frost-free season: 202 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Apr 10First frost ~Oct 31Frost season at Snow Hill, MDSpring: a frost after March 27 in 9 years out of 10, after April 10 in half of the years, after April 28 in 1 year out of 10. Fall: the first frost comes before October 16 in 1 year out of 10, before October 31 in half of the years, before November 14 in 9 years out of 10. Typical frost-free season: 202 days.JFMAMJJASONDLast frost ~Apr 10First frost ~Oct 31
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 28October 16
50% (typical)April 10October 31
90% (likely)March 27November 14
Frost-free season (32°F, 50% chance)
202 days
Hard frost (28°F), last in spring, 50% chance after
March 29
Hard frost (28°F), first in fall, 50% chance before
November 11

The last 15 years (2006–2020 normals)

Typical last frost April 9 (1 day earlier than the 30-year normal), typical first fall frost November 2 (2 days later). Frost-free season 206 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 Snow Hill: chance of a frost after this dateSpring, chance of a frost after the date: 10% April 28, 20% April 21, 30% April 17, 40% April 14, 50% April 10, 60% April 6, 70% April 3, 80% March 31, 90% March 27. Observed last spring frost in recent years: 2021 April 3, 2022 April 28, 2023 April 10, 2024 March 26, 2025 April 17, 2026 April 21.Spring: last frostChance of a frost after this date10%50%90%Apr 1May 1Apr 28Apr 10Mar 272021: April 32022: April 282023: April 102024: March 262025: April 172026: April 21Fall at Snow Hill: chance of a frost before this dateFall, chance of a frost before the date: 10% October 16, 20% October 22, 30% October 25, 40% October 28, 50% October 31, 60% November 2, 70% November 5, 80% November 8, 90% November 14. Observed first fall frost in recent years: 2021 November 15, 2022 October 19, 2023 November 2, 2024 October 28, 2025 November 7.Fall: first frostChance of a frost before this date10%50%90%Nov 1Oct 16Oct 31Nov 142021: November 152022: October 192023: November 22024: October 282025: November 7
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 3November 15
2022April 28October 19
2023April 10November 2
2024March 26October 28
2025April 17November 7
2026April 21season not over yet

What these dates mean

April 28 is the cautious spring light-frost date for Snow Hill, and it marks the point at which a gardener can set out tender crops with only a 10 % chance of a later frost. The 50 % chance of a light frost in spring occurs on April 10, when the odds of a later frost are evenly split. In the fall the cautious date is October 16, giving a 10 % chance that a frost has already arrived and allowing the gardener to finish harvesting tender crops. The 50 % chance of a light frost in fall is on October 31.

A hard frost (28 °F) can cause more severe damage than a light frost, so the 50 % chance of a hard frost falls on March 29 in spring and on November 11 in fall, providing important reference points for gardeners.

How to read the probabilities

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

  • Spring: "10% after April 28" 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 16" 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 Snow Hill, MDNumbered nearest stations: 1 — near Salisbury, MD — 10 mi; 2 — Wallops Island Flight Fac, VA — 21 mi; 3 — Painter, VA — 51 mi; 4 — Cape May, NJ — 55 mi; 5 — Royal Oak, MD — 55 mi.MDVADE25 mi · 40 km1. near Salisbury, MD — 10 mi12. Wallops Island Flight Fac, VA — 21 mi23. Painter, VA — 51 mi34. Cape May, NJ — 55 mi45. Royal Oak, MD — 55 mi5
  1. near Salisbury, MD 10 mi (17 km)
  2. Wallops Island Flight Fac, VA 21 mi (33 km)
  3. Painter, VA 51 mi (82 km)
  4. Cape May, NJ 55 mi (89 km)
  5. Royal Oak, MD 55 mi (89 km)

Sources

* Hardiness zone 7b: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 38.2317, -75.3761.