When is the last frost in Annapolis, MD?

The average last spring frost (50% probability of 32°F) in Annapolis is around March 27, based on NOAA/NCEI 1991–2020 normals at the Annapolis Police Brks, MD station (2.5 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 Annapolis?

The average first fall frost in Annapolis, MD is around November 13, giving roughly a 234-day frost-free growing season.

What planting zone is Annapolis, MD?

Annapolis is in USDA plant hardiness zone 7b (average annual extreme minimum temperature 5 to 10°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Annapolis?

In Annapolis, MD the warmest month is July (avg high 86°F) and the coldest is January (avg low 29.8°F). It averages about 44″ of precipitation a year.

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Annapolis, MD Planting Calendar & Frost Dates

USDA hardiness zone 7b · ZIP 21401 · elevation 2′ · NOAA & USDA data

Annapolis is in USDA hardiness zone 7b (winters can dip to 5 to 10°F), with a growing season of about 234 days between the average last spring frost (March 27) and first fall frost (November 13). The warmest month is July (avg high 86°F); the coldest is January (avg low 29.8°F). It averages 44″ of precipitation a year. 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 5 to 10°F

Last spring frost

March 27

avg (50% prob, 32°F)

First fall frost

November 13

avg (50% prob, 32°F)

Growing season

234 days

frost-free window

Warmest month

July

avg high 86°F

Month-by-month typical weather in Annapolis

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Annapolis Naf, MD (4.6 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	43.1	29.8	36.5	2.8	–
February	45.2	31.5	38.4	2.4	–
March	53.1	38.3	45.7	3.8	–
April	63.7	47.2	55.4	3.4	–
May	73	57.3	65.1	3.2	–
June	81.5	67.7	74.6	4	–
July	86	71.9	79	4.9	–
August	83.7	70.5	77.1	4.3	–
September	77.4	64.8	71.1	5.1	–
October	67.1	52.2	59.7	4	–
November	56.2	42.3	49.3	3	–
December	47.2	34.1	40.6	3	–

What to plant when in Annapolis

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: February 13 · Transplant out: April 3
Peppers	warm	Start seeds indoors: January 30 · Transplant out: April 10
Cucumbers	warm	Direct sow: April 3
Zucchini / squash	warm	Direct sow: April 3
Bush beans	warm	Direct sow: April 3
Sweet corn	warm	Direct sow: April 3
Basil	warm	Transplant out: April 3
Peas	cool	Sow (spring): February 20 · Sow (fall): September 18
Spinach	cool	Sow (spring): February 13 · Sow (fall): September 18
Lettuce	cool	Sow (spring): February 27 · Sow (fall): September 18
Kale	cool	Transplant (spring): March 6 · Sow (fall): September 4
Broccoli	cool	Transplant (spring): March 13
Carrots	cool	Sow (spring): March 6 · Sow (fall): September 4
Onions	cool	Transplant (spring): February 27
Potatoes	cool	Plant seed potatoes: March 13
Radishes	cool	Sow (spring): February 27 · Sow (fall): October 2

Dates are computed from Annapolis'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.

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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 Maryland

Bowie, MD Baltimore, MD Rockville, MD Gaithersburg, MD Frederick, MD Hagerstown, MD

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 — Annapolis Police Brks, MD, 2.5 mi (confidence: high). Monthly weather normals: Annapolis Naf, MD, 4.6 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.