Frost dates for Massabesic Lake, NH
At Massabesic Lake, the median last spring frost (32°F) is Apr 30 and the median first fall frost is Oct 11, for a typical growing season of 164 days. For a 90% chance that the last frost has passed, wait until May 14. Nearby ZIP codes are in USDA hardiness zone 6a.
- Apr 30Last spring frost (median)50% chance of 32°F after this date
- May 14Safer planting date10% chance of 32°F after this date
- Oct 11First fall frost (median)50% chance of 32°F by this date
- 164 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 30 | May 12 | May 24 |
| 32°F | Apr 19 | Apr 30 | May 14 |
| 28°F | Apr 6 | Apr 17 | May 2 |
| 24°F | Mar 25 | Apr 5 | Apr 18 |
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 20 | Oct 2 | Oct 14 |
| 32°F | Sep 30 | Oct 11 | Oct 27 |
| 28°F | Oct 8 | Oct 24 | Nov 8 |
| 24°F | Oct 20 | Nov 5 | Nov 22 |
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 | 125 days | 141 days | 160 days |
| 32°F | 146 days | 164 days | 183 days |
| 28°F | 168 days | 188 days | 209 days |
| 24°F | 192 days | 213 days | 233 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 |
|---|---|---|---|
| 03032 | 6a | -10 to -5°F | 2 km |
| 03109 | 6a | -10 to -5°F | 3 km |
| 03104 | 6a | -10 to -5°F | 4 km |
| 03101 | 6a | -10 to -5°F | 6 km |
| 03102 | 6a | -10 to -5°F | 8 km |
| 03034 | 6a | -10 to -5°F | 9 km |
| 03106 | 6a | -10 to -5°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 USC00275211, at 42.9892, -71.3933, elevation 77 m (253 ft).
- Data quality: Standard (24+ years of data), 27 years of freeze data.
- Average days per year at or below 32°F: 161.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Manchester Airport (7 km)
- W Hampstead (18 km)
- Nashua 2 NNW (23 km)
- Hudson 1 SSE (23 km)
- Concord Muni Airport (25 km)
- Epping (26 km)
- E Milford (26 km)
- Milford (27 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.