Frost dates for Fort Kent, ME
At Fort Kent, the median last spring frost (32°F) is May 23 and the median first fall frost is Sep 24, for a typical growing season of 121 days. For a 90% chance that the last frost has passed, wait until Jun 6. Nearby ZIP codes are in USDA hardiness zones 4a to 4b.
- May 23Last spring frost (median)50% chance of 32°F after this date
- Jun 6Safer planting date10% chance of 32°F after this date
- Sep 24First fall frost (median)50% chance of 32°F by this date
- 121 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 24 | Jun 4 | Jun 17 |
| 32°F | May 8 | May 23 | Jun 6 |
| 28°F | Apr 28 | May 9 | May 23 |
| 24°F | Apr 17 | Apr 29 | 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 31 | Sep 13 | Sep 25 |
| 32°F | Sep 11 | Sep 24 | Oct 5 |
| 28°F | Sep 21 | Oct 3 | Oct 17 |
| 24°F | Oct 1 | Oct 16 | Nov 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 | 79 days | 100 days | 116 days |
| 32°F | 102 days | 121 days | 139 days |
| 28°F | 128 days | 147 days | 166 days |
| 24°F | 153 days | 170 days | 190 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 |
|---|---|---|---|
| 04781 | 4a | -30 to -25°F | 10 km |
| 04743 | 4b | -25 to -20°F | 12 km |
| 04739 | 4a | -30 to -25°F | 29 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 USC00172878, at 47.2386, -68.6119, elevation 186 m (610 ft).
- Data quality: Standard (24+ years of data), 30 years of freeze data.
- Average days per year at or below 32°F: 201.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Frenchville Aroostook Airport (23 km)
- Allagash (35 km)
- Van Buren 2 (51 km)
- Caribou Muni Airport (61 km)
- Limestone 4 NNW (63 km)
- Presque Isle (80 km)
- Clayton Lake (98 km)
- Bridgewater (107 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.