Frost dates in New Jersey
Across New Jersey, the typical last spring frost is around Apr 15 and the first fall frost around Oct 28. 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 Apr 2 and Apr 25, and its first fall frosts between Oct 18 and Nov 10.
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 New Jersey: zone 6b, zone 7a, zone 7b, zone 8a
Frost dates by county in New Jersey
| County | Last spring frost | First fall frost | Growing season |
|---|---|---|---|
| Atlantic | Apr 14 | Oct 29 | About 198 days |
| Bergen | Apr 3 | Nov 4 | About 215 days |
| Burlington | Apr 15 | Oct 29 | About 197 days |
| Camden | Apr 12 | Nov 1 | About 203 days |
| Cape May | Apr 24 | Nov 9 | About 199 days |
| Cumberland | Apr 24 | Oct 23 | About 182 days |
| Essex | Apr 4 | Nov 6 | About 216 days |
| Gloucester | Apr 8 | Nov 3 | About 209 days |
| Hudson | Mar 30 | Nov 20 | About 235 days |
| Hunterdon | Apr 24 | Oct 21 | About 180 days |
| Mercer | Apr 17 | Oct 28 | About 194 days |
| Middlesex | Apr 15 | Oct 26 | About 194 days |
| Monmouth | Apr 9 | Nov 3 | About 208 days |
| Morris | Apr 18 | Oct 23 | About 188 days |
| Ocean | Apr 23 | Oct 20 | About 180 days |
| Passaic | Apr 15 | Oct 28 | About 196 days |
| Salem | Apr 10 | Nov 1 | About 205 days |
| Somerset | Apr 26 | Oct 20 | About 177 days |
| Sussex | Apr 25 | Oct 16 | About 174 days |
| Union | Apr 11 | Oct 31 | About 203 days |
| Warren | Apr 30 | Oct 18 | About 171 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.