Frost dates for Jamaica Plain, MA
At Jamaica Plain, the median last spring frost (32°F) is Apr 19 and the median first fall frost is Oct 23, for a typical growing season of 185 days. For a 90% chance that the last frost has passed, wait until May 3. Nearby ZIP codes are in USDA hardiness zones 6b to 7a.
- Apr 19Last spring frost (median)50% chance of 32°F after this date
- May 3Safer planting date10% chance of 32°F after this date
- Oct 23First fall frost (median)50% chance of 32°F by this date
- 185 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 20 | May 2 | May 16 |
| 32°F | Apr 6 | Apr 19 | May 3 |
| 28°F | Mar 25 | Apr 5 | Apr 21 |
| 24°F | Mar 12 | Mar 28 | Apr 7 |
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 30 | Oct 10 | Oct 25 |
| 32°F | Oct 8 | Oct 23 | Nov 5 |
| 28°F | Oct 19 | Nov 3 | Nov 19 |
| 24°F | Nov 1 | Nov 15 | Dec 3 |
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 | 144 days | 161 days | 181 days |
| 32°F | 165 days | 185 days | 204 days |
| 28°F | 191 days | 210 days | 230 days |
| 24°F | 213 days | 233 days | 257 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 |
|---|---|---|---|
| 02130 | 6b | -5 to 0°F | 1 km |
| 02131 | 6b | -5 to 0°F | 2 km |
| 02445 | 6b | -5 to 0°F | 3 km |
| 02467 | 6b | -5 to 0°F | 3 km |
| 02121 | 6b | -5 to 0°F | 3 km |
| 02120 | 7a | 0 to 5°F | 4 km |
| 02119 | 7a | 0 to 5°F | 4 km |
| 02132 | 6b | -5 to 0°F | 4 km |
| 02126 | 6b | -5 to 0°F | 4 km |
| 02124 | 6b | -5 to 0°F | 4 km |
| 02446 | 6b | -5 to 0°F | 4 km |
| 02115 | 7a | 0 to 5°F | 5 km |
| 02215 | 6b | -5 to 0°F | 5 km |
| 02459 | 6b | -5 to 0°F | 6 km |
| 02135 | 6b | -5 to 0°F | 6 km |
| 02125 | 7a | 0 to 5°F | 6 km |
| 02122 | 7a | 0 to 5°F | 6 km |
| 02134 | 6b | -5 to 0°F | 6 km |
| 02139 | 6b | -5 to 0°F | 7 km |
| 02461 | 6b | -5 to 0°F | 7 km |
| 02163 | 6b | -5 to 0°F | 7 km |
| 02458 | 6b | -5 to 0°F | 8 km |
| 02464 | 6b | -5 to 0°F | 8 km |
| 02138 | 6b | -5 to 0°F | 9 km |
| 02472 | 6b | -5 to 0°F | 9 km |
| 02460 | 6b | -5 to 0°F | 9 km |
| 02494 | 6b | -5 to 0°F | 9 km |
| 02468 | 6b | -5 to 0°F | 9 km |
| 02465 | 6b | -5 to 0°F | 10 km |
| 02140 | 6b | -5 to 0°F | 10 km |
| 02478 | 6b | -5 to 0°F | 11 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 USC00193890, at 42.3031, -71.1242, elevation 29 m (95 ft).
- Data quality: Standard (24+ years of data), 25 years of freeze data.
- Average days per year at or below 32°F: 121.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Blue Hill COOP (10 km)
- Blue Hill (10 km)
- Boston Logan Intl Airport (11 km)
- Norwood Mem Airport (13 km)
- Natick (18 km)
- Walpole 2 (19 km)
- Hingham (19 km)
- Bedford Hanscom Field (23 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.