When is the last frost in Farmington, NM?

The average last spring frost (50% probability of 32°F) in Farmington is around May 2, based on NOAA/NCEI 1991–2020 normals at the Farmington Rgnl Ap, NM station (2.6 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 Farmington?

The average first fall frost in Farmington, NM is around October 13, giving roughly a 160-day frost-free growing season.

What planting zone is Farmington, NM?

Farmington is in USDA plant hardiness zone 7a (average annual extreme minimum temperature 0 to 5°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Farmington?

In Farmington, NM the warmest month is July (avg high 93.3°F) and the coldest is January (avg low 19.2°F). It averages about 7.8″ of precipitation a year.

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Farmington, NM Planting Calendar & Frost Dates

USDA hardiness zone 7a · ZIP 87401 · elevation 1675′ · NOAA & USDA data

Farmington is in USDA hardiness zone 7a (winters can dip to 0 to 5°F), with a growing season of about 160 days between the average last spring frost (May 2) and first fall frost (October 13). The warmest month is July (avg high 93.3°F); the coldest is January (avg low 19.2°F). It averages 7.8″ 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 0 to 5°F

Last spring frost

May 2

avg (50% prob, 32°F)

First fall frost

October 13

avg (50% prob, 32°F)

Growing season

160 days

frost-free window

Warmest month

July

avg high 93.3°F

Month-by-month typical weather in Farmington

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Farmington Rgnl Ap, NM (2.6 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	43	19.2	31.1	0.7	–
February	49.5	23.5	36.5	0.7	–
March	59.9	29.6	44.8	0.6	–
April	67.4	35.3	51.3	0.6	–
May	77.2	43.6	60.4	0.5	–
June	89.3	52.5	70.9	0.2	–
July	93.3	60.9	77.1	0.6	–
August	89.7	59.5	74.6	0.8	–
September	82.1	50.5	66.3	1.1	–
October	68.8	37.8	53.3	0.8	–
November	54.6	27.1	40.8	0.7	–
December	43.1	19.4	31.3	0.6	–

What to plant when in Farmington

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: March 21 · Transplant out: May 9
Peppers	warm	Start seeds indoors: March 7 · Transplant out: May 16
Cucumbers	warm	Direct sow: May 9
Zucchini / squash	warm	Direct sow: May 9
Bush beans	warm	Direct sow: May 9
Sweet corn	warm	Direct sow: May 9
Basil	warm	Transplant out: May 9
Peas	cool	Sow (spring): March 28 · Sow (fall): August 18
Spinach	cool	Sow (spring): March 21 · Sow (fall): August 18
Lettuce	cool	Sow (spring): April 4 · Sow (fall): August 18
Kale	cool	Transplant (spring): April 11 · Sow (fall): August 4
Broccoli	cool	Transplant (spring): April 18
Carrots	cool	Sow (spring): April 11 · Sow (fall): August 4
Onions	cool	Transplant (spring): April 4
Potatoes	cool	Plant seed potatoes: April 18
Radishes	cool	Sow (spring): April 4 · Sow (fall): September 1

Dates are computed from Farmington'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.

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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 — Farmington Rgnl Ap, NM, 2.6 mi (confidence: high). Monthly weather normals: Farmington Rgnl Ap, NM, 2.6 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.