Frost dates for Corinna, ME
At Corinna, the median last spring frost (32°F) is May 8 and the median first fall frost is Oct 3, for a typical growing season of 148 days. For a 90% chance that the last frost has passed, wait until May 23. Nearby ZIP codes are in USDA hardiness zones 4b to 5a.
- May 8Last spring frost (median)50% chance of 32°F after this date
- May 23Safer planting date10% chance of 32°F after this date
- Oct 3First fall frost (median)50% chance of 32°F by this date
- 148 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 8 | May 21 | Jun 3 |
| 32°F | Apr 27 | May 8 | May 23 |
| 28°F | Apr 13 | Apr 26 | May 8 |
| 24°F | Apr 2 | Apr 14 | Apr 25 |
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 10 | Sep 23 | Oct 5 |
| 32°F | Sep 21 | Oct 3 | Oct 17 |
| 28°F | Oct 1 | Oct 15 | Nov 1 |
| 24°F | Oct 13 | Oct 30 | Nov 14 |
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 | 104 days | 124 days | 142 days |
| 32°F | 129 days | 148 days | 164 days |
| 28°F | 152 days | 171 days | 191 days |
| 24°F | 178 days | 197 days | 216 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 |
|---|---|---|---|
| 04928 | 4b | -25 to -20°F | 3 km |
| 04953 | 4b | -25 to -20°F | 6 km |
| 04435 | 5a | -20 to -15°F | 10 km |
| 04488 | 5a | -20 to -15°F | 11 km |
| 04965 | 5a | -20 to -15°F | 13 km |
| 04969 | 5a | -20 to -15°F | 15 km |
| 04929 | 5a | -20 to -15°F | 17 km |
| 04427 | 5a | -20 to -15°F | 19 km |
| 04434 | 5a | -20 to -15°F | 20 km |
| 04932 | 5a | -20 to -15°F | 26 km |
| 04987 | 5a | -20 to -15°F | 27 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 USC00171628, at 44.9197, -69.2417, elevation 90 m (297 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 175.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Harmony (24 km)
- E Sangerville (24 km)
- Dover-Foxcroft Wastewater Plant (30 km)
- Bangor Intl Airport (36 km)
- Sebec Lake (37 km)
- Barnard (42 km)
- Old Town 2 W (43 km)
- Orono (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.