Frost dates for Mecklenburg 4sw, NY
At Mecklenburg 4sw, the median last spring frost (32°F) is May 10 and the median first fall frost is Oct 8, for a typical growing season of 150 days. For a 90% chance that the last frost has passed, wait until May 26. Nearby ZIP codes are in USDA hardiness zone 6a.
- May 10Last spring frost (median)50% chance of 32°F after this date
- May 26Safer planting date10% chance of 32°F after this date
- Oct 8First fall frost (median)50% chance of 32°F by this date
- 150 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 7 | May 23 | Jun 4 |
| 32°F | Apr 26 | May 10 | May 26 |
| 28°F | Apr 13 | Apr 29 | May 13 |
| 24°F | Apr 3 | Apr 16 | May 1 |
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 12 | Sep 26 | Oct 8 |
| 32°F | Sep 25 | Oct 8 | Oct 25 |
| 28°F | Oct 6 | Oct 24 | Nov 8 |
| 24°F | Oct 19 | Nov 6 | 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 | 107 days | 125 days | 146 days |
| 32°F | 129 days | 150 days | 173 days |
| 28°F | 152 days | 176 days | 199 days |
| 24°F | 179 days | 203 days | 225 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 |
|---|---|---|---|
| 14818 | 6a | -10 to -5°F | 5 km |
| 14886 | 6a | -10 to -5°F | 9 km |
| 14869 | 6a | -10 to -5°F | 9 km |
| 14805 | 6a | -10 to -5°F | 11 km |
| 14865 | 6a | -10 to -5°F | 11 km |
| 14841 | 6a | -10 to -5°F | 12 km |
| 14854 | 6a | -10 to -5°F | 15 km |
| 14878 | 6a | -10 to -5°F | 15 km |
| 14867 | 6a | -10 to -5°F | 17 km |
| 14891 | 6a | -10 to -5°F | 17 km |
| 14860 | 6a | -10 to -5°F | 18 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 USC00305233, at 42.4422, -76.7586, elevation 460 m (1,510 ft).
- Data quality: Representative (10+ years), 17 years of freeze data.
- Average days per year at or below 32°F: 156.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Ithaca Cornell Univ (25 km)
- Penn Yan Airport (33 km)
- Elmira Corning Regional Airport (33 km)
- Aurora Rsch Farm (33 km)
- Spencer 1 NE (35 km)
- Freeville 1 NE (36 km)
- Elmira (39 km)
- Ithaca 13 E (42 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.