Frost dates for Groveland, MA
At Groveland, the median last spring frost (32°F) is May 3 and the median first fall frost is Oct 8, for a typical growing season of 158 days. For a 90% chance that the last frost has passed, wait until May 17. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- May 3Last spring frost (median)50% chance of 32°F after this date
- May 17Safer planting date10% chance of 32°F after this date
- Oct 8First fall frost (median)50% chance of 32°F by this date
- 158 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 3 | May 15 | May 27 |
| 32°F | Apr 22 | May 3 | May 17 |
| 28°F | Apr 7 | Apr 21 | May 4 |
| 24°F | Mar 27 | 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 17 | Sep 30 | Oct 10 |
| 32°F | Sep 28 | Oct 8 | Oct 23 |
| 28°F | Oct 5 | Oct 20 | Nov 4 |
| 24°F | Oct 18 | Nov 1 | 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 | 119 days | 135 days | 152 days |
| 32°F | 141 days | 158 days | 175 days |
| 28°F | 162 days | 182 days | 201 days |
| 24°F | 189 days | 208 days | 228 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 |
|---|---|---|---|
| 01834 | 6a | -10 to -5°F | 2 km |
| 01833 | 6b | -5 to 0°F | 5 km |
| 01921 | 6b | -5 to 0°F | 7 km |
| 01985 | 6b | -5 to 0°F | 9 km |
| 01922 | 6b | -5 to 0°F | 11 km |
| 01969 | 6b | -5 to 0°F | 13 km |
| 01950 | 6b | -5 to 0°F | 14 km |
| 01951 | 6b | -5 to 0°F | 16 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 USC00193276, at 42.7467, -71.0425, elevation 9 m (30 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 147.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Haverhill (2 km)
- Lawrence Muni Airport (7 km)
- Lawrence (11 km)
- Middleton (17 km)
- Beverly Muni Airport (21 km)
- Beverly (24 km)
- Reading (26 km)
- Lowell (29 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.