Frost dates for Waterville Trtmt Plant, ME
At Waterville Trtmt Plant, the median last spring frost (32°F) is May 2 and the median first fall frost is Oct 10, for a typical growing season of 159 days. For a 90% chance that the last frost has passed, wait until May 14. Nearby ZIP codes are in USDA hardiness zones 5a to 5b.
- May 2Last spring frost (median)50% chance of 32°F after this date
- May 14Safer planting date10% chance of 32°F after this date
- Oct 10First fall frost (median)50% chance of 32°F by this date
- 159 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 3 | May 14 | May 27 |
| 32°F | Apr 23 | May 2 | May 14 |
| 28°F | Apr 10 | Apr 22 | May 3 |
| 24°F | Mar 31 | Apr 8 | Apr 21 |
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 19 | Oct 1 | Oct 11 |
| 32°F | Sep 30 | Oct 10 | Oct 27 |
| 28°F | Oct 7 | Oct 24 | Nov 7 |
| 24°F | Oct 21 | Nov 4 | Nov 19 |
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 | 119 days | 137 days | 154 days |
| 32°F | 141 days | 159 days | 176 days |
| 28°F | 165 days | 183 days | 201 days |
| 24°F | 190 days | 208 days | 224 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 |
|---|---|---|---|
| 04901 | 5b | -15 to -10°F | 7 km |
| 04989 | 5b | -15 to -10°F | 11 km |
| 04975 | 5b | -15 to -10°F | 12 km |
| 04926 | 5b | -15 to -10°F | 12 km |
| 04937 | 5a | -20 to -15°F | 14 km |
| 04917 | 5b | -15 to -10°F | 15 km |
| 04358 | 5b | -15 to -10°F | 16 km |
| 04910 | 5a | -20 to -15°F | 17 km |
| 04944 | 5a | -20 to -15°F | 18 km |
| 04927 | 5a | -20 to -15°F | 18 km |
| 04354 | 5b | -15 to -10°F | 23 km |
| 04988 | 5a | -20 to -15°F | 24 km |
| 04922 | 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 USC00179151, at 44.5272, -69.6544, elevation 22 m (73 ft).
- Data quality: Standard (24+ years of data), 27 years of freeze data.
- Average days per year at or below 32°F: 164.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Augusta State Airport (26 km)
- New Sharon (30 km)
- Madison (35 km)
- Gardiner (36 km)
- Livermore Falls 1 E (41 km)
- Farmington (44 km)
- Harmony (47 km)
- Corinna (54 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.