Frost dates for Eastport, ME
At Eastport, the median last spring frost (32°F) is Apr 29 and the median first fall frost is Oct 25, for a typical growing season of 178 days. For a 90% chance that the last frost has passed, wait until May 11. Nearby ZIP codes are in USDA hardiness zones 5b to 6a.
- Apr 29Last spring frost (median)50% chance of 32°F after this date
- May 11Safer planting date10% chance of 32°F after this date
- Oct 25First fall frost (median)50% chance of 32°F by this date
- 178 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 28 |
| 32°F | Apr 16 | Apr 29 | May 11 |
| 28°F | Apr 1 | Apr 12 | Apr 27 |
| 24°F | Mar 20 | Apr 2 | 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 26 | Oct 8 | Oct 23 |
| 32°F | Oct 8 | Oct 25 | Nov 7 |
| 28°F | Oct 24 | Nov 6 | Nov 21 |
| 24°F | Nov 6 | Nov 20 | Dec 1 |
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 | 149 days | 169 days |
| 32°F | 156 days | 178 days | 197 days |
| 28°F | 187 days | 207 days | 225 days |
| 24°F | 212 days | 229 days | 248 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 |
|---|---|---|---|
| 04631 | 6a | -10 to -5°F | 1 km |
| 04652 | 6a | -10 to -5°F | 11 km |
| 04628 | 5b | -15 to -10°F | 23 km |
| 04691 | 5b | -15 to -10°F | 26 km |
| 04626 | 6a | -10 to -5°F | 32 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 USC00172426, at 44.9067, -66.9919, elevation 26 m (85 ft).
- Data quality: Representative (10+ years), 15 years of freeze data.
- Average days per year at or below 32°F: 138.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Robbinston (22 km)
- Woodland (42 km)
- Wesley (53 km)
- Jonesboro (59 km)
- Grand Lake Stream (68 km)
- Vanceboro No. 2 (80 km)
- Topsfield 2 (82 km)
- Danforth (108 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.