Frost Dates for Hopatcong, NJ
Frost Dates
See the average dates of the last frost of spring and the first frost of fall for your location across the U.S. and Canada.
| Nearest Climate Station | Altitude | Last Spring Frost | First Fall Frost | Growing Season |
|---|---|---|---|---|
| ANDOVER AEROFLEX AP, NJ | 583' | May 2 | Oct 13 | 163 days |
Last and first frost dates are 30% probability. Calculated using 1991-2020 Climate Normals from NOAA.
Our frost dates are based on 1991–2020 climate data from the National Oceanic and Atmospheric Administration (NOAA). We use a 30% probability threshold, meaning there’s about a 3 in 10 chance frost will occur before or after the given date. Because microclimates vary—your backyard might be warmer or cooler than nearby towns—use these dates as a flexible guide, not a guarantee.
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