Frost dates for Grafton, NY
At Grafton, the median last spring frost (32°F) is May 1 and the median first fall frost is Oct 11, for a typical growing season of 162 days. For a 90% chance that the last frost has passed, wait until May 15. Nearby ZIP codes are in USDA hardiness zone 5b.
- May 1Last spring frost (median)50% chance of 32°F after this date
- May 15Safer planting date10% chance of 32°F after this date
- Oct 11First fall frost (median)50% chance of 32°F by this date
- 162 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 30 | May 14 | May 30 |
| 32°F | Apr 18 | May 1 | May 15 |
| 28°F | Apr 5 | Apr 18 | May 2 |
| 24°F | Mar 28 | Apr 7 | Apr 20 |
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 | Sep 19 | Oct 1 | Oct 15 |
| 32°F | Sep 28 | Oct 11 | Oct 27 |
| 28°F | Oct 7 | Oct 25 | Nov 7 |
| 24°F | Oct 23 | Nov 5 | Nov 20 |
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 | 120 days | 138 days | 157 days |
| 32°F | 142 days | 162 days | 181 days |
| 28°F | 166 days | 187 days | 207 days |
| 24°F | 192 days | 211 days | 230 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 |
|---|---|---|---|
| 12082 | 5b | -15 to -10°F | 2 km |
| 12052 | 5b | -15 to -10°F | 3 km |
| 12138 | 5b | -15 to -10°F | 9 km |
| 12185 | 5b | -15 to -10°F | 11 km |
| 12153 | 5b | -15 to -10°F | 17 km |
| 12018 | 5b | -15 to -10°F | 18 km |
| 12169 | 5b | -15 to -10°F | 21 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 USC00303360, at 42.7833, -73.4667, elevation 476 m (1,560 ft).
- Data quality: Representative (10+ years), 14 years of freeze data.
- Average days per year at or below 32°F: 152.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Buskirk (17 km)
- Troy L&d (18 km)
- Albany Airport (28 km)
- Saratoga Springs 4 SW (41 km)
- Valatie 1 N (43 km)
- Alcove Dam (51 km)
- Delanson 2ne (58 km)
- Glens Falls Farm (63 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.