Frost dates for Molloy Cercom, NY
At Molloy Cercom, the median last spring frost (32°F) is Apr 4 and the median first fall frost is Nov 11, for a typical growing season of 219 days. For a 90% chance that the last frost has passed, wait until Apr 21. Nearby ZIP codes are in USDA hardiness zones 7a to 7b.
- Apr 4Last spring frost (median)50% chance of 32°F after this date
- Apr 21Safer planting date10% chance of 32°F after this date
- Nov 11First fall frost (median)50% chance of 32°F by this date
- 219 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Apr 5 | Apr 20 | May 8 |
| 32°F | Mar 22 | Apr 4 | Apr 21 |
| 28°F | Mar 9 | Mar 24 | Apr 5 |
| 24°F | Feb 27 | Mar 14 | Mar 29 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Oct 15 | Oct 30 | Nov 13 |
| 32°F | Oct 27 | Nov 11 | Nov 29 |
| 28°F | Nov 6 | Nov 24 | Dec 12 |
| 24°F | Nov 18 | Dec 7 | Dec 26 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 168 days | 192 days | 212 days |
| 32°F | 197 days | 219 days | 241 days |
| 28°F | 223 days | 246 days | 268 days |
| 24°F | 244 days | 267 days | 290 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 11796 | 7b | 5 to 10°F | 1 km |
| 11782 | 7b | 5 to 10°F | 2 km |
| 11769 | 7b | 5 to 10°F | 3 km |
| 11705 | 7b | 5 to 10°F | 4 km |
| 11715 | 7b | 5 to 10°F | 6 km |
| 11739 | 7b | 5 to 10°F | 6 km |
| 11730 | 7b | 5 to 10°F | 8 km |
| 11772 | 7a | 0 to 5°F | 10 km |
| 11751 | 7b | 5 to 10°F | 10 km |
| 11706 | 7b | 5 to 10°F | 13 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00302151, at 40.7211, -73.0908, elevation 2 m (5 ft).
- Data quality: Estimated from nearby stations (2+ years), 5 years of freeze data.
- Average days per year at or below 32°F: 76.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Islip Li Macarthur Airport (8 km)
- Shirley Brookhaven Airport (22 km)
- Mount Sinai (24 km)
- Upton COOP - Nwsfo New York (25 km)
- Setauket Strong (26 km)
- Farmingdale Airport (28 km)
- Centerport (30 km)
- Wantagh Cedar Creek (36 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.