Frost dates for Worthington, MA
At Worthington, the median last spring frost (32°F) is May 13 and the median first fall frost is Oct 2, for a typical growing season of 144 days. For a 90% chance that the last frost has passed, wait until May 26. Nearby ZIP codes are in USDA hardiness zones 5b to 6a.
- May 13Last spring frost (median)50% chance of 32°F after this date
- May 26Safer planting date10% chance of 32°F after this date
- Oct 2First fall frost (median)50% chance of 32°F by this date
- 144 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 11 | May 25 | Jun 7 |
| 32°F | Apr 29 | May 13 | May 26 |
| 28°F | Apr 15 | Apr 30 | May 13 |
| 24°F | Apr 2 | Apr 15 | Apr 30 |
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 10 | Sep 22 | Oct 3 |
| 32°F | Sep 20 | Oct 2 | Oct 15 |
| 28°F | Oct 1 | Oct 14 | Oct 31 |
| 24°F | Oct 10 | Oct 29 | Nov 12 |
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 | 102 days | 120 days | 139 days |
| 32°F | 123 days | 144 days | 162 days |
| 28°F | 147 days | 168 days | 190 days |
| 24°F | 172 days | 196 days | 216 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 |
|---|---|---|---|
| 01098 | 6a | -10 to -5°F | 2 km |
| 01084 | 6a | -10 to -5°F | 5 km |
| 01012 | 6a | -10 to -5°F | 5 km |
| 01026 | 5b | -15 to -10°F | 9 km |
| 01243 | 6a | -10 to -5°F | 11 km |
| 01050 | 6a | -10 to -5°F | 11 km |
| 01011 | 6a | -10 to -5°F | 11 km |
| 01032 | 6a | -10 to -5°F | 12 km |
| 01235 | 5b | -15 to -10°F | 12 km |
| 01096 | 6a | -10 to -5°F | 13 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 USC00199972, at 42.3869, -72.9211, elevation 392 m (1,285 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 168.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- E Hawley (21 km)
- Lenox Dale (28 km)
- Pittsfield Muni Airport (31 km)
- Westfield Barnes Muni Airport (31 km)
- Amherst (32 km)
- Leverett #2 (33 km)
- Greenfield #3 (34 km)
- Westfield 3 SW (34 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.