When is the last frost in Brentwood, TN?

The average last spring frost (50% probability of 32°F) in Brentwood is around April 15, based on NOAA/NCEI 1991–2020 normals at the Brentwood, TN station (0.7 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 Brentwood?

The average first fall frost in Brentwood, TN is around October 26, giving roughly a 193-day frost-free growing season.

What planting zone is Brentwood, TN?

Brentwood 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 Brentwood?

In Brentwood, TN the warmest month is July (avg high 89.5°F) and the coldest is January (avg low 26.2°F). It averages about 54.4″ of precipitation a year.

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Brentwood, TN Planting Calendar & Frost Dates

USDA hardiness zone 7b · ZIP 37027 · elevation 216′ · NOAA & USDA data

Brentwood is in USDA hardiness zone 7b (winters can dip to 5 to 10°F), with a growing season of about 193 days between the average last spring frost (April 15) and first fall frost (October 26). The warmest month is July (avg high 89.5°F); the coldest is January (avg low 26.2°F). It averages 54.4″ 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

April 15

avg (50% prob, 32°F)

First fall frost

October 26

avg (50% prob, 32°F)

Growing season

193 days

frost-free window

Warmest month

July

avg high 89.5°F

Month-by-month typical weather in Brentwood

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Brentwood, TN (0.7 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	47.9	26.2	37.1	4.7	–
February	52.9	28.1	40.5	4.7	–
March	61.4	34.6	48	5.5	–
April	71	43.7	57.4	4.9	–
May	79.1	52.6	65.9	5.7	–
June	86.6	62.6	74.6	4.4	–
July	89.5	66.2	77.9	4.5	–
August	88.8	64.2	76.5	3.7	–
September	83.6	56.9	70.2	4	–
October	73	45.3	59.2	3.5	–
November	60.9	33.9	47.4	4	–
December	51.1	29.2	40.2	4.9	–

What to plant when in Brentwood

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: March 4 · Transplant out: April 22
Peppers	warm	Start seeds indoors: February 18 · Transplant out: April 29
Cucumbers	warm	Direct sow: April 22
Zucchini / squash	warm	Direct sow: April 22
Bush beans	warm	Direct sow: April 22
Sweet corn	warm	Direct sow: April 22
Basil	warm	Transplant out: April 22
Peas	cool	Sow (spring): March 11 · Sow (fall): August 31
Spinach	cool	Sow (spring): March 4 · Sow (fall): August 31
Lettuce	cool	Sow (spring): March 18 · Sow (fall): August 31
Kale	cool	Transplant (spring): March 25 · Sow (fall): August 17
Broccoli	cool	Transplant (spring): April 1
Carrots	cool	Sow (spring): March 25 · Sow (fall): August 17
Onions	cool	Transplant (spring): March 18
Potatoes	cool	Plant seed potatoes: April 1
Radishes	cool	Sow (spring): March 18 · Sow (fall): September 14

Dates are computed from Brentwood'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 Tennessee

Nashville, TN Franklin, TN Smyrna, TN Hendersonville, TN Murfreesboro, TN Clarksville, TN Chattanooga, TN Jackson, TN

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 — Brentwood, TN, 0.7 mi (confidence: high). Monthly weather normals: Brentwood, TN, 0.7 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.