Frost dates for Downsville Dam, NY
At Downsville Dam, the median last spring frost (32°F) is May 15 and the median first fall frost is Oct 3, for a typical growing season of 140 days. For a 90% chance that the last frost has passed, wait until May 30. Nearby ZIP codes are in USDA hardiness zones 5a to 5b.
- May 15Last spring frost (median)50% chance of 32°F after this date
- May 30Safer planting date10% chance of 32°F after this date
- Oct 3First fall frost (median)50% chance of 32°F by this date
- 140 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 | May 12 | May 27 | Jun 8 |
| 32°F | Apr 30 | May 15 | May 30 |
| 28°F | Apr 22 | May 3 | May 19 |
| 24°F | Apr 8 | Apr 22 | May 8 |
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 11 | Sep 24 | Oct 5 |
| 32°F | Sep 21 | Oct 3 | Oct 16 |
| 28°F | Sep 28 | Oct 13 | Oct 29 |
| 24°F | Oct 9 | Oct 27 | Nov 9 |
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 | 101 days | 118 days | 137 days |
| 32°F | 119 days | 140 days | 159 days |
| 28°F | 140 days | 161 days | 182 days |
| 24°F | 163 days | 187 days | 208 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 |
|---|---|---|---|
| 13755 | 5b | -15 to -10°F | 3 km |
| 13782 | 5a | -20 to -15°F | 10 km |
| 13756 | 5b | -15 to -10°F | 13 km |
| 12776 | 5b | -15 to -10°F | 13 km |
| 13774 | 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 USC00302169, at 42.0772, -74.9828, elevation 366 m (1,200 ft).
- Data quality: Estimated from nearby stations (2+ years), 9 years of freeze data.
- Average days per year at or below 32°F: 170.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Walton 2 (18 km)
- Delhi 2 SE (21 km)
- Callicoon Center (28 km)
- E Sidney (35 km)
- Liberty 1 NE (37 km)
- Deposit (37 km)
- Emmons (44 km)
- Slide Mountain (47 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.