Claremont, NH 05030 Frost Dates
05030, near Claremont, NH: the frost window
The last spring frost here typically falls around 05/09, about 254 days from today. Fall's first freeze usually shows up around 10/02, roughly 146 days after the last spring frost.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Claremont, not a forecast for this year.
Stretching the season past the first frost
Claremont's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Claremont's last frost
05/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/22 and only about 1 year in 10 sees frost after that.
Claremont against the rest of the dataset
Claremont's growing season runs about 146 days, ranking 36,034 of 40,283 US ZIP codes measured here, longest to shortest. Within NH, it ranks 164 of 260.
Learn more
Two guides worth reading on 05030: the frost range, on how to read the range around Claremont's dates instead of trusting one, and local microclimates, on what one yard in Claremont can differ from the 05030 normal.