When is the last frost in Alexandria, VA?

The average last spring frost (50% probability of 32°F) in Alexandria is around March 24, based on NOAA/NCEI 1991–2020 normals at the Washington Reagan Ap, VA station (2.4 mi away). Half of years it falls outside that date, so wait 1–2 weeks past it before setting out frost-tender plants.

When is the first fall frost in Alexandria?

The average first fall frost in Alexandria, VA is around November 18, giving roughly a 241-day frost-free growing season.

What planting zone is Alexandria, VA?

Alexandria is in USDA plant hardiness zone 8a (average annual extreme minimum temperature 10 to 15°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Alexandria?

In Alexandria, VA the warmest month is July (avg high 89.6°F) and the coldest is January (avg low 30.1°F). It averages about 41.8″ of precipitation a year and 13.7″ of snow.

Home › Virginia › Alexandria

Alexandria, VA Planting Calendar & Frost Dates

USDA hardiness zone 8a · ZIP 22301 · elevation 3′ · NOAA & USDA data

Alexandria is in USDA hardiness zone 8a (winters can dip to 10 to 15°F), with a growing season of about 241 days between the average last spring frost (March 24) and first fall frost (November 18). The warmest month is July (avg high 89.6°F); the coldest is January (avg low 30.1°F). It averages 41.8″ of precipitation a year and 13.7″ of snow, mostly mid-winter. Start cool-season crops several weeks before the last frost; wait until after it for tomatoes, peppers and other tender crops.

Hardiness zone

min temp 10 to 15°F

Last spring frost

March 24

avg (50% prob, 32°F)

First fall frost

November 18

avg (50% prob, 32°F)

Growing season

241 days

frost-free window

Warmest month

July

avg high 89.6°F

Month-by-month typical weather in Alexandria

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Washington Reagan Ap, VA (2.4 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	44.8	30.1	37.5	2.9	4.9
February	48.3	31.8	40	2.6	5
March	56.5	38.6	47.6	3.5	2
April	68	48.4	58.2	3.2	0
May	76.5	58	67.2	3.9	0
June	85.1	67.5	76.3	4.2	0
July	89.6	72.4	81	4.3	0
August	87.8	71	79.4	3.3	0
September	80.7	64.1	72.4	3.9	0
October	69.4	52.2	60.8	3.7	0
November	58.2	41.6	49.9	2.9	0.1
December	48.8	34.5	41.7	3.4	1.7

What to plant when in Alexandria

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: February 10 · Transplant out: March 31
Peppers	warm	Start seeds indoors: January 27 · Transplant out: April 7
Cucumbers	warm	Direct sow: March 31
Zucchini / squash	warm	Direct sow: March 31
Bush beans	warm	Direct sow: March 31
Sweet corn	warm	Direct sow: March 31
Basil	warm	Transplant out: March 31
Peas	cool	Sow (spring): February 17 · Sow (fall): September 23
Spinach	cool	Sow (spring): February 10 · Sow (fall): September 23
Lettuce	cool	Sow (spring): February 24 · Sow (fall): September 23
Kale	cool	Transplant (spring): March 3 · Sow (fall): September 9
Broccoli	cool	Transplant (spring): March 10
Carrots	cool	Sow (spring): March 3 · Sow (fall): September 9
Onions	cool	Transplant (spring): February 24
Potatoes	cool	Plant seed potatoes: March 10
Radishes	cool	Sow (spring): February 24 · Sow (fall): October 7

Dates are computed from Alexandria's average frost dates using standard cool-/warm-season timing. They're a starting point — a cold spring, a warm microclimate, or a fast-maturing variety can shift them by a week or two.

Want the exact dates for your yard? →
Look up your precise ZIP-code frost dates and a full 26-crop planting calendar on our free interactive tool.
Open the frost & planting tool

🌾 Get a frost reminder

One email in early spring and early fall with the dates for your area. No spam.

Gear that helps you plant on time

Some links below are Amazon affiliate links (tag theboringthin-20). If you buy through them we may earn a small commission at no extra cost to you — it keeps this almanac free. We only list generic, genuinely-useful categories.

Soil thermometer →Know when the ground is warm enough to sow — the honest signal, not the calendar.Seed-starting trays + dome →Start tomatoes & peppers indoors on the schedule below.Seedling heat mat →Warms the soil for faster, more even germination indoors.Floating row cover / frost cloth →Buys you 4–8°F to beat an early or late frost.Raised garden bed kit →Warms and drains faster in spring than in-ground soil.Garden gloves →Basic kit for transplant day.

Nearby cities in Virginia

Manassas, VA Leesburg, VA Richmond, VA Charlottesville, VA Harrisonburg, VA Newport News, VA Hampton, VA Suffolk, VA

Sources & method. Hardiness zone: 2023 USDA Plant Hardiness Zone Map (PRISM Climate Group, Oregon State University). Frost dates & growing season: NOAA/NCEI 1991–2020 U.S. Climate Normals, nearest station with published freeze normals — Washington Reagan Ap, VA, 2.4 mi (confidence: high). Monthly weather normals: Washington Reagan Ap, VA, 2.4 mi (confidence: high). ZIP centroid from U.S. Census 2023 ZCTA data. Frost dates are the 50%-probability date — half of years frost occurs outside the stated date. Nothing here is invented; where the nearest station is far, we say so. Last updated 2026-07-22.