Frost dates for Meredith 3 NNE, NH
At Meredith 3 NNE, the median last spring frost (32°F) is Apr 28 and the median first fall frost is Oct 16, for a typical growing season of 171 days. For a 90% chance that the last frost has passed, wait until May 9. Nearby ZIP codes are in USDA hardiness zone 5b.
- Apr 28Last spring frost (median)50% chance of 32°F after this date
- May 9Safer planting date10% chance of 32°F after this date
- Oct 16First fall frost (median)50% chance of 32°F by this date
- 171 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 29 | May 9 | May 22 |
| 32°F | Apr 15 | Apr 28 | May 9 |
| 28°F | Apr 3 | Apr 13 | Apr 25 |
| 24°F | Mar 21 | Apr 4 | Apr 15 |
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 24 | Oct 5 | Oct 18 |
| 32°F | Oct 3 | Oct 16 | Nov 1 |
| 28°F | Oct 15 | Oct 31 | Nov 14 |
| 24°F | Oct 31 | Nov 12 | Nov 26 |
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 | 128 days | 146 days | 164 days |
| 32°F | 152 days | 171 days | 191 days |
| 28°F | 179 days | 197 days | 215 days |
| 24°F | 202 days | 220 days | 239 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 |
|---|---|---|---|
| 03226 | 5b | -15 to -10°F | 3 km |
| 03253 | 5b | -15 to -10°F | 7 km |
| 03254 | 5b | -15 to -10°F | 9 km |
| 03256 | 5b | -15 to -10°F | 15 km |
| 03853 | 5b | -15 to -10°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 USC00275350, at 43.6931, -71.4733, elevation 262 m (861 ft).
- Data quality: Estimated from nearby stations (2+ years), 9 years of freeze data.
- Average days per year at or below 32°F: 146.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Lakeport 2 (16 km)
- E Sandwich (17 km)
- Plymouth (17 km)
- Tamworth 4 (25 km)
- Waterville Valley Nepp (28 km)
- Franklin Falls Dam (29 km)
- Wentworth (40 km)
- Grafton (41 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.