Frost dates for Mount Morris 2 W, NY
At Mount Morris 2 W, the median last spring frost (32°F) is Apr 30 and the median first fall frost is Oct 17, for a typical growing season of 170 days. For a 90% chance that the last frost has passed, wait until May 13. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- Apr 30Last spring frost (median)50% chance of 32°F after this date
- May 13Safer planting date10% chance of 32°F after this date
- Oct 17First fall frost (median)50% chance of 32°F by this date
- 170 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 26 | May 9 | May 25 |
| 32°F | Apr 17 | Apr 30 | May 13 |
| 28°F | Apr 4 | Apr 18 | May 2 |
| 24°F | Mar 23 | Apr 6 | Apr 19 |
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 22 | Oct 4 | Oct 19 |
| 32°F | Oct 1 | Oct 17 | Nov 2 |
| 28°F | Oct 13 | Nov 1 | Nov 15 |
| 24°F | Oct 31 | Nov 13 | Dec 1 |
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 | 127 days | 147 days | 166 days |
| 32°F | 148 days | 170 days | 190 days |
| 28°F | 172 days | 195 days | 216 days |
| 24°F | 201 days | 220 days | 241 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 |
|---|---|---|---|
| 14481 | 6a | -10 to -5°F | 5 km |
| 14510 | 6a | -10 to -5°F | 5 km |
| 14530 | 6a | -10 to -5°F | 8 km |
| 14556 | 6b | -5 to 0°F | 8 km |
| 14539 | 6a | -10 to -5°F | 12 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 USC00305597, at 42.7314, -77.9053, elevation 268 m (880 ft).
- Data quality: Representative (10+ years), 25 years of freeze data.
- Average days per year at or below 32°F: 140.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Pavilion 2ne (21 km)
- Wyoming 3w (22 km)
- Dansville Muni Airport (24 km)
- Dansville (24 km)
- Avon (24 km)
- Hemlock (25 km)
- Warsaw 6 SW (26 km)
- Honeoye (33 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.