Frost dates for Pittston Farm, ME
At Pittston Farm, the median last spring frost (32°F) is May 20 and the median first fall frost is Sep 23, for a typical growing season of 123 days. For a 90% chance that the last frost has passed, wait until Jun 3. Nearby ZIP codes are in USDA hardiness zones 4a to 5a.
- May 20Last spring frost (median)50% chance of 32°F after this date
- Jun 3Safer planting date10% chance of 32°F after this date
- Sep 23First fall frost (median)50% chance of 32°F by this date
- 123 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 21 | Jun 3 | Jun 14 |
| 32°F | May 6 | May 20 | Jun 3 |
| 28°F | Apr 26 | May 7 | May 21 |
| 24°F | Apr 12 | Apr 27 | May 9 |
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 | Aug 30 | Sep 11 | Sep 24 |
| 32°F | Sep 8 | Sep 23 | Oct 5 |
| 28°F | Sep 19 | Oct 3 | Oct 19 |
| 24°F | Oct 1 | Oct 18 | Nov 2 |
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 | 84 days | 101 days | 117 days |
| 32°F | 105 days | 123 days | 142 days |
| 28°F | 128 days | 147 days | 167 days |
| 24°F | 151 days | 173 days | 192 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 04478 | 4b | -25 to -20°F | 24 km |
| 04945 | 4b | -25 to -20°F | 43 km |
| 04442 | 4b | -25 to -20°F | 51 km |
| 04441 | 4a | -30 to -25°F | 56 km |
| 04985 | 4b | -25 to -20°F | 58 km |
| 04485 | 5a | -20 to -15°F | 67 km |
| 04464 | 5a | -20 to -15°F | 76 km |
| 04925 | 5a | -20 to -15°F | 76 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 USC00176721, at 45.8944, -69.9647, elevation 335 m (1,100 ft).
- Data quality: Representative (10+ years), 18 years of freeze data.
- Average days per year at or below 32°F: 202.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Pittston Farms Nepp (0 km)
- Brassua Dam (29 km)
- Jackman (37 km)
- Moosehead (39 km)
- Greenville Maine Forestry Svc (56 km)
- Long Falls Dam (77 km)
- Eustis (86 km)
- Clayton Lake (87 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.