Norwich, CT 06336 Frost Dates
Norwich, CT: when does the frost end?
Around 04/14 is the usual last spring frost, about 229 days away. Fall's first freeze usually shows up around 10/24, roughly 192 days after the last spring frost.
Norwich sits in USDA Zone 6b (-5 to 0°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 8 weeks until Norwich's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
Norwich against the rest of the dataset
About 192 days separate Norwich's last and first frost, putting it 20,159 of 40,283 ZIP codes nationally. Within CT, it ranks 108 of 391.
Learn more
Before leaning on 06336's figures: zone vs. frost date explains why Zone 6b and Norwich's frost date answer different questions, while the frost range explains how to read the range around Norwich's dates instead of trusting one.