Frost dates for E Sandwich, NH
At E Sandwich, the median last spring frost (32°F) is May 6 and the median first fall frost is Oct 6, for a typical growing season of 151 days. For a 90% chance that the last frost has passed, wait until May 19. Nearby ZIP codes are in USDA hardiness zones 5a to 5b.
- May 6Last spring frost (median)50% chance of 32°F after this date
- May 19Safer planting date10% chance of 32°F after this date
- Oct 6First fall frost (median)50% chance of 32°F by this date
- 151 daysGrowing season (median)between 32°F freezes
USDA hardiness zone 5b (-15 to -10°F) · see all zone 5b frost dates
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 7 | May 19 | Jun 2 |
| 32°F | Apr 26 | May 6 | May 19 |
| 28°F | Apr 10 | Apr 24 | May 5 |
| 24°F | Mar 31 | Apr 9 | Apr 22 |
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 14 | Sep 26 | Oct 8 |
| 32°F | Sep 24 | Oct 6 | Oct 19 |
| 28°F | Oct 3 | Oct 19 | Nov 4 |
| 24°F | Oct 19 | Nov 2 | 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 | 111 days | 129 days | 145 days |
| 32°F | 133 days | 151 days | 167 days |
| 28°F | 158 days | 177 days | 197 days |
| 24°F | 185 days | 205 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 |
|---|---|---|---|
| 03883 | 5a | -20 to -15°F | 2 km |
| 03227 | 5b | -15 to -10°F | 10 km |
| 03850 | 5b | -15 to -10°F | 13 km |
| 03816 | 5b | -15 to -10°F | 15 km |
| 03864 | 5b | -15 to -10°F | 23 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 USC00272303, at 43.8100, -71.3425, elevation 211 m (692 ft).
- Data quality: Estimated from nearby stations (2+ years), 4 years of freeze data.
- Average days per year at or below 32°F: 173.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Tamworth 4 (9 km)
- Meredith 3 NNE (17 km)
- Waterville Valley Nepp (20 km)
- Plymouth (25 km)
- Lakeport 2 (31 km)
- N Conway (32 km)
- Lincoln Nepp (37 km)
- Franklin Falls Dam (45 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.