Keene, NH 03444 Frost Dates
Keene, NH: when does the frost end?
The last spring frost here typically falls around 05/05, about 250 days from today. Fall's first freeze usually shows up around 10/06, roughly 154 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Keene in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 6 weeks until Keene's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Keene's last frost
05/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/19 and only about 1 year in 10 sees frost after that.
Keene against the rest of the dataset
At roughly 154 frost-free days, Keene places 34,217 of 40,283 ZIP codes in this dataset. Within NH, it ranks 105 of 260.
Learn more
Before leaning on 03444's figures: local microclimates explains what one yard in Keene can differ from the 03444 normal, while zone vs. frost date explains why Zone 6a and Keene's frost date answer different questions.