Last frost dates in New Jersey
48 NOAA weather stations in New Jersey have thirty years of frost records. The median station sees its last 32 °F night around Apr 16; across the state that ranges from Mar 26 to May 1, so pick the station nearest you rather than a state-wide figure.
| ATLANTIC CITY | Mar 26 | Apr 6 | Mar 10 | Nov 21 | 240 |
| MARGATE | Mar 26 | Apr 7 | Mar 9 | Nov 22 | 243 |
| BRANT BEACH-BEACH HAVEN | Apr 1 | Apr 15 | Mar 16 | Nov 15 | 230 |
| CAPE MAY 2 NW | Apr 1 | Apr 15 | Mar 19 | Nov 9 | 222 |
| NEWARK INTL AP | Apr 2 | Apr 15 | Mar 20 | Nov 10 | 222 |
| TETERBORO AP | Apr 3 | Apr 16 | Mar 20 | Nov 4 | 215 |
| HARRISON | Apr 4 | Apr 16 | Mar 23 | Nov 6 | 216 |
| GLASSBORO 2 NE | Apr 8 | Apr 22 | Mar 27 | Nov 1 | 205 |
| LONG BRANCH-OAKHURST | Apr 9 | Apr 23 | Mar 28 | Nov 3 | 208 |
| SEABROOK FARMS | Apr 10 | Apr 25 | Mar 28 | Nov 1 | 205 |
| TRENTON MERCER CO AP | Apr 10 | Apr 25 | Mar 30 | Nov 1 | 202 |
| CRANFORD | Apr 11 | Apr 28 | Mar 30 | Oct 31 | 202 |
| PLAINFIELD | Apr 11 | Apr 27 | Mar 31 | Oct 28 | 198 |
| WOODSTOWN PITTSGROV 4E | Apr 11 | Apr 27 | Mar 29 | Nov 3 | 206 |
| MOORESTOWN | Apr 12 | May 3 | Mar 28 | Nov 1 | 200 |
| CALDWELL ESSEX CO AP | Apr 14 | Apr 30 | Apr 1 | Oct 28 | 196 |
| HAMMONTON 1 NE | Apr 14 | Apr 27 | Apr 1 | Oct 27 | 196 |
| LITTLE FALLS | Apr 15 | May 1 | Apr 1 | Oct 28 | 195 |
| MT HOLLY S JERSEY AP | Apr 15 | May 2 | Mar 31 | Oct 28 | 195 |
| NEW BRUNSWICK 3 SE | Apr 15 | May 1 | Apr 2 | Oct 26 | 193 |
| PENNSAUKEN 1N | Apr 15 | May 1 | Apr 1 | Oct 31 | 199 |
| PHILADELPHIA/MT HOLLY WFO | Apr 15 | Apr 29 | Apr 1 | Oct 29 | 196 |
| LAMBERTVILLE | Apr 16 | Apr 30 | Apr 2 | Oct 19 | 185 |
| WERTSVILLE 4 NE | Apr 16 | May 1 | Apr 3 | Oct 27 | 192 |
| BOONTON 1 SE | Apr 17 | May 5 | Apr 4 | Oct 23 | 189 |
| FREEHOLD-MARLBORO | Apr 17 | May 6 | Apr 2 | Oct 23 | 190 |
| TRENTON STATE COLLEGE | Apr 17 | May 6 | Apr 2 | Oct 28 | 192 |
| ATLANTIC CITY INTL AP | Apr 18 | May 5 | Apr 2 | Oct 29 | 190 |
| CANOE BROOK | Apr 18 | May 6 | Apr 3 | Oct 27 | 189 |
| ESSEX FELLS SERVICE BLDG | Apr 18 | May 7 | Apr 3 | Oct 24 | 187 |
| PHILLIPSBURG-EASTON BRG | Apr 18 | May 5 | Apr 5 | Oct 25 | 188 |
| WANAQUE RAYMOND DAM | Apr 19 | May 3 | Apr 5 | Oct 23 | 188 |
| SUSSEX 8 NNW | Apr 20 | May 5 | Apr 7 | Oct 20 | 181 |
| TOMS RIVER | Apr 23 | May 12 | Apr 8 | Oct 20 | 179 |
| BELLEPLAIN STN FOREST | Apr 24 | May 18 | Apr 5 | Oct 22 | 181 |
| ESTELL MANOR | Apr 24 | May 12 | Apr 8 | Oct 22 | 180 |
| FLEMINGTON 5 NNW | Apr 24 | May 11 | Apr 9 | Oct 21 | 179 |
| MILLVILLE MUNI AP | Apr 24 | May 10 | Apr 8 | Oct 23 | 181 |
| NEWTON | Apr 24 | May 9 | Apr 11 | Oct 16 | 176 |
| ANDOVER AEROFLEX AP | Apr 25 | May 11 | Apr 12 | Oct 19 | 175 |
| CHARLOTTEBURG RSVR | Apr 25 | May 11 | Apr 12 | Oct 17 | 174 |
| HIGHTSTOWN 2 W | Apr 25 | May 12 | Apr 12 | Oct 16 | 173 |
| SOMERVILLE SOMERSET AP | Apr 26 | May 13 | Apr 11 | Oct 18 | 176 |
| INDIAN MILLS 2 W | Apr 28 | May 16 | Apr 14 | Oct 15 | 169 |
| BELVIDERE BRG | Apr 30 | May 18 | Apr 15 | Oct 18 | 168 |
| SOMERVILLE 4 NW | Apr 30 | May 14 | Apr 15 | Oct 20 | 172 |
| SUSSEX 3 WNW | Apr 30 | May 18 | Apr 17 | Oct 11 | 163 |
| SUSSEX AP | May 1 | May 18 | Apr 19 | Oct 12 | 164 |
How to read the three dates
Average is the date by which, in half of the years between 1991 and 2020, the last 32 °F night had already happened. Safe is later: only one year in ten saw a frost after it, which is the date to set out frost-tender plants such as dahlia tubers and zinnia seedlings. Early is the risky end, with a frost after it in nine years out of ten.
Every figure is for the weather station, not for your garden. A valley bottom, a north slope or a spot near a lake can run a week or two either way. Cities are warmer than the countryside around them.
Where the numbers come from
The dates are NOAA's U.S. Climate Normals for 1991 to 2020, computed by the National Centers for Environmental Information for every station with thirty years of daily minimum temperatures. ZIP codes are matched to the nearest such station within 150 km using U.S. Census Bureau ZIP Code Tabulation Area centroids. Stations that never see a frost, such as much of south Florida, report no date and are left out.