Frost dates for Vienna, Virginia
Half of years have their last spring frost by April 14 — but 1 year in 10 still frosts after April 28.
Every other site gives you one date. A frost date is not a date: it is a percentile from 30 years of records at a nearby weather station, and planting to the median means losing the crop in half of years. Both numbers are below, so you can choose the risk yourself.
The odds
Last spring frost
- Frost this late in 1 year in 10
- April 28
- 1 year in 5
- April 23
- 3 years in 10
- April 20
- 2 years in 5
- April 16
- Half of years (the median)
- April 14
First fall freeze
- Freeze this early in 1 year in 10
- October 17
- 1 year in 5
- October 21
- 3 years in 10
- October 24
- 2 years in 5
- October 27
- Half of years (the median)
- October 29
- Growing season
- about 198 days
- Hardiness zones nearby
- 7a, 7b, 8a
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, station Vienna (USC00448737), at 38.89, -77.29. These are that station's own records, unshifted. The further your garden is from it, the less exactly they describe your ground — the planner resolves the nearest station to your own ZIP and lowers its confidence with distance, rather than presenting one number as if it were measured in your yard.
Cold air also pools in low ground on the clear, still nights when frost happens, so a hollow can freeze while a slope a hundred metres away does not. No table can know that about your garden. Your own logged frosts eventually can.
ZIP codes nearest this station
20004, 20005, 20006, 20007, 20008, 20009, 20010, 20011, 20012, 20015, 20016, 20024, 20036, 20037, 20045, 20052, 20057, 20109, 20110, 20111, 20112, 20120, 20121, 20124, 20143, 20151, 20152, 20164, 20165, 20166, 20170, 20171, 20190, 20191, 20194, 20228, 20230, 20240, 20245, 20260, 20307, 20405, 20418, 20427, 20506, 20520, 20551, 20560, 20566, 20616, 20812, 20814, 20815, 20816, 20817, 20818, 20852, 20854, 20895, 20896, 20901, 20902, 20910, 22003, 22015, 22025, 22026, 22027, 22030, 22031, 22032, 22033, 22035, 22039, 22041, 22042, 22043, 22044, 22046, 22060, 22066, 22079, 22101, 22102, 22124, 22125, 22150, 22151, 22152, 22153, 22180, 22181, 22182, 22185, 22191, 22192, 22193, 22201, 22202, 22203, 22204, 22205, 22206, 22207, 22209, 22211, 22213, 22214, 22301, 22302, 22303, 22304, 22305, 22306, 22307, 22308, 22309, 22310, 22311, 22312 and 2 more.
What can I plant here, and when? →
Nearby stations
The nearest stations, and how their last-frost dates compare — the frost gradient across your area, which no single station shows.
- Damascus 3 Ssw, MD — last frost by April 14
- Upper Marlboro 3 Nnw, MD — last frost by April 9
- Purcellville Hcn, VA — last frost by April 16
- Warrenton 3 Se, VA — last frost by April 9
- Baltimore Wash Intl Ap, MD — last frost by April 10
- Mechanicsville 5 Ne, MD — last frost by April 17
Other stations in Virginia.
- Corbin, VA — last frost by April 14
- Somerset, VA — last frost by April 17
- Ashland Hanover Co Muni Ap, VA — last frost by April 10
- W Pt 2 Nw, VA — last frost by April 6
- Painter 2 W, VA — last frost by April 4
- Langley Afb, VA — last frost by March 24
- Fentress Naas, VA — last frost by March 23
- Roanoke Rgnl Ap, VA — last frost by April 3