Smithfield, VA 23433 Frost Dates
Smithfield, VA: when does the frost end?
Around 03/16 is the usual last spring frost, about 200 days away. Fall's first freeze usually shows up around 11/26, roughly 255 days after the last spring frost.
Smithfield sits in USDA Zone 8b (15 to 20°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 13 weeks until Smithfield'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
03/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/01 and only about 1 year in 10 sees frost after that.
Smithfield against the rest of the dataset
Smithfield's growing season runs about 255 days, ranking 6,914 of 40,283 US ZIP codes measured here, longest to shortest. Within VA, it ranks 14 of 1,178.
Learn more
Before leaning on 23433's figures: local microclimates explains what one yard in Smithfield can differ from the 23433 normal, while zone vs. frost date explains why Zone 8b and Smithfield's frost date answer different questions.