Frost dates for St. Albans Radio, VT
At St. Albans Radio, the median last spring frost (32°F) is May 1 and the median first fall frost is Oct 12, for a typical growing season of 161 days. For a 90% chance that the last frost has passed, wait until May 16. Nearby ZIP codes are in USDA hardiness zone 5a.
- May 1Last spring frost (median)50% chance of 32°F after this date
- May 16Safer planting date10% chance of 32°F after this date
- Oct 12First fall frost (median)50% chance of 32°F by this date
- 161 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 29 | May 12 | May 26 |
| 32°F | Apr 20 | May 1 | May 16 |
| 28°F | Apr 9 | Apr 21 | May 5 |
| 24°F | Apr 2 | Apr 11 | Apr 23 |
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 18 | Oct 2 | Oct 15 |
| 32°F | Sep 28 | Oct 12 | Oct 26 |
| 28°F | Oct 6 | Oct 23 | Nov 6 |
| 24°F | Oct 17 | Nov 3 | 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 | 123 days | 142 days | 160 days |
| 32°F | 142 days | 161 days | 181 days |
| 28°F | 163 days | 183 days | 204 days |
| 24°F | 185 days | 205 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 |
|---|---|---|---|
| 05481 | 5a | -20 to -15°F | 7 km |
| 05478 | 5a | -20 to -15°F | 8 km |
| 05488 | 5a | -20 to -15°F | 8 km |
| 05483 | 5a | -20 to -15°F | 9 km |
| 05485 | 5a | -20 to -15°F | 10 km |
| 05474 | 5a | -20 to -15°F | 11 km |
| 05455 | 5a | -20 to -15°F | 12 km |
| 05459 | 5a | -20 to -15°F | 12 km |
| 05454 | 5a | -20 to -15°F | 17 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 USC00437032, at 44.8592, -73.0911, elevation 116 m (380 ft).
- Data quality: Representative (10+ years), 13 years of freeze data.
- Average days per year at or below 32°F: 148.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Enosburg Falls 2 (23 km)
- Enosburg Falls (23 km)
- S Hero (31 km)
- Essex Junction 1 N (39 km)
- Johnson 2 N (40 km)
- Mount Mansfield (43 km)
- Burlington Intl Airport (44 km)
- Eden 2 S (47 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.