Colonial Beach, VA 20645 Frost Dates
Colonial Beach, VA: when does the frost end?
Around 04/17 is the usual last spring frost, about 232 days away. Fall's first freeze usually shows up around 10/27, roughly 195 days after the last spring frost.
Zone 7b (5 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 Colonial Beach, not a forecast for this year.
Stretching the season past the first frost
With roughly 9 weeks until Colonial Beach'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
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/02 and only about 1 year in 10 sees frost after that.
Colonial Beach against the rest of the dataset
Colonial Beach's growing season runs about 195 days, ranking 19,271 of 40,283 US ZIP codes measured here, longest to shortest. Within VA, it ranks 741 of 1,178.
Learn more
Before leaning on 20645's figures: local microclimates explains what one yard in Colonial Beach can differ from the 20645 normal, while zone vs. frost date explains why Zone 7b and Colonial Beach's frost date answer different questions.