Frost dates for Olean, NY
At Olean, the median last spring frost (32°F) is May 7 and the median first fall frost is Oct 11, for a typical growing season of 156 days. For a 90% chance that the last frost has passed, wait until May 22. Nearby ZIP codes are in USDA hardiness zone 5b.
- May 7Last spring frost (median)50% chance of 32°F after this date
- May 22Safer planting date10% chance of 32°F after this date
- Oct 11First fall frost (median)50% chance of 32°F by this date
- 156 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 5 | May 20 | Jun 1 |
| 32°F | Apr 23 | May 7 | May 22 |
| 28°F | Apr 14 | Apr 26 | May 9 |
| 24°F | Apr 2 | Apr 15 | Apr 29 |
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 12 |
| 32°F | Sep 29 | Oct 11 | Oct 25 |
| 28°F | Oct 10 | Oct 24 | Nov 6 |
| 24°F | Oct 23 | Nov 5 | Nov 17 |
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 | 112 days | 131 days | 152 days |
| 32°F | 136 days | 156 days | 175 days |
| 28°F | 158 days | 180 days | 199 days |
| 24°F | 183 days | 204 days | 222 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 |
|---|---|---|---|
| 14778 | 5b | -15 to -10°F | 3 km |
| 14760 | 5b | -15 to -10°F | 3 km |
| 14788 | 5b | -15 to -10°F | 6 km |
| 14706 | 5b | -15 to -10°F | 7 km |
| 16729 | 5b | -15 to -10°F | 12 km |
| 16727 | 5b | -15 to -10°F | 12 km |
| 14770 | 5b | -15 to -10°F | 13 km |
| 16731 | 5b | -15 to -10°F | 16 km |
| 14721 | 5b | -15 to -10°F | 16 km |
| 16745 | 5b | -15 to -10°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 USC00306196, at 42.0736, -78.4517, elevation 433 m (1,420 ft).
- Data quality: Representative (10+ years), 10 years of freeze data.
- Average days per year at or below 32°F: 150.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Salamanca 2 (24 km)
- Allegany State Park (25 km)
- Franklinville (28 km)
- Little Valley (35 km)
- Wellsville Muni Airport (38 km)
- Wellsville (42 km)
- Angelica (44 km)
- Jamestown 4 ENE (59 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.