Frost dates for Chazy, NY
At Chazy, the median last spring frost (32°F) is Apr 30 and the median first fall frost is Oct 12, for a typical growing season of 164 days. For a 90% chance that the last frost has passed, wait until May 14. Nearby ZIP codes are in USDA hardiness zone 5a.
- Apr 30Last spring frost (median)50% chance of 32°F after this date
- May 14Safer planting date10% chance of 32°F after this date
- Oct 12First fall frost (median)50% chance of 32°F by this date
- 164 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 28 | May 11 | May 25 |
| 32°F | Apr 17 | Apr 30 | May 14 |
| 28°F | Apr 6 | Apr 19 | May 2 |
| 24°F | Mar 30 | 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 18 | Oct 1 | Oct 15 |
| 32°F | Sep 29 | Oct 12 | Oct 30 |
| 28°F | Oct 6 | Oct 25 | Nov 10 |
| 24°F | Oct 20 | Nov 4 | Nov 19 |
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 | 122 days | 142 days | 161 days |
| 32°F | 144 days | 164 days | 184 days |
| 28°F | 166 days | 189 days | 207 days |
| 24°F | 192 days | 210 days | 227 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 |
|---|---|---|---|
| 12921 | 5a | -20 to -15°F | 3 km |
| 05463 | 5a | -20 to -15°F | 4 km |
| 12919 | 5a | -20 to -15°F | 10 km |
| 12992 | 5a | -20 to -15°F | 12 km |
| 05440 | 5a | -20 to -15°F | 12 km |
| 12979 | 5a | -20 to -15°F | 12 km |
| 12958 | 5a | -20 to -15°F | 16 km |
| 12910 | 5a | -20 to -15°F | 17 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 USC00301401, at 44.8786, -73.3953, elevation 48 m (157 ft).
- Data quality: Representative (10+ years), 17 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
- Plattsburgh Intl Airport (26 km)
- Dannemora (31 km)
- Ellenburg Depot (34 km)
- Peru 2 WSW (37 km)
- Willsboro 1 N (55 km)
- Malone (72 km)
- Lake Placid 2 S (79 km)
- Saranac Regional Airport (84 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.