Frost dates in Vermont
Across Vermont, the typical last spring frost is around May 13 and the first fall frost around Oct 1. Your own dates depend on where you are in the state; find your county below.
Most of the state's last spring frosts fall between May 1 and May 21, and its first fall frosts between Sep 26 and Oct 12.
These are the dates with a 50% chance of a 32°F frost on or after (spring) or on or before (fall), so plan tender crops a week or two after the spring date and keep row cover handy. For dates at your exact ZIP code, use the zone and frost date lookup; for what to plant when, see the planting guide by frost date.
Hardiness zones in Vermont: zone 4a, zone 4b, zone 5a, zone 5b
Frost dates by county in Vermont
| County | Last spring frost | First fall frost | Growing season |
|---|---|---|---|
| Addison | May 5 | Oct 3 | About 151 days |
| Bennington | May 13 | Oct 2 | About 142 days |
| Caledonia | May 13 | Oct 1 | About 141 days |
| Chittenden | Apr 29 | Oct 15 | About 169 days |
| Essex | May 25 | Sep 22 | About 120 days |
| Franklin | May 1 | Oct 12 | About 164 days |
| Grand Isle | Apr 30 | Oct 12 | About 165 days |
| Lamoille | May 9 | Oct 1 | About 145 days |
| Orange | May 14 | Sep 29 | About 138 days |
| Orleans | May 14 | Sep 30 | About 139 days |
| Rutland | May 15 | Sep 29 | About 137 days |
| Washington | May 16 | Oct 1 | About 138 days |
| Windham | May 13 | Oct 3 | About 143 days |
| Windsor | May 13 | Oct 2 | About 142 days |
Source: NOAA NCEI U.S. Climate Normals 1991–2020, 50% probability of 32°F, from the weather station nearest each ZIP code; each county shows the middle value across its ZIP codes. Hills, valleys and cities can run a week or more earlier or later.