When is the last frost in Manteca, CA?

The average last spring frost (50% probability of 32°F) in Manteca is around February 25, based on NOAA/NCEI 1991–2020 normals at the Tracy Carbona, CA station (7.3 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 Manteca?

The average first fall frost in Manteca, CA is around November 26, giving roughly a 272-day frost-free growing season.

What planting zone is Manteca, CA?

Manteca is in USDA plant hardiness zone 9b (average annual extreme minimum temperature 25 to 30°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Manteca?

In Manteca, CA the warmest month is July (avg high 93.2°F) and the coldest is January (avg low 36.4°F). It averages about 12.7″ of precipitation a year.

Home › California › Manteca

Manteca, CA Planting Calendar & Frost Dates

USDA hardiness zone 9b · ZIP 95337 · elevation 41′ · NOAA & USDA data

Manteca is in USDA hardiness zone 9b (winters can dip to 25 to 30°F), with a growing season of about 272 days between the average last spring frost (February 25) and first fall frost (November 26). The warmest month is July (avg high 93.2°F); the coldest is January (avg low 36.4°F). It averages 12.7″ 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 25 to 30°F

Last spring frost

February 25

avg (50% prob, 32°F)

First fall frost

November 26

avg (50% prob, 32°F)

Growing season

272 days

frost-free window

Warmest month

July

avg high 93.2°F

Month-by-month typical weather in Manteca

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Tracy Carbona, CA (7.3 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	57.2	36.4	46.8	2.3	–
February	62.1	38.9	50.5	2.6	–
March	68	41.6	54.8	1.7	–
April	73.4	45	59.2	1	–
May	80.4	50.3	65.4	0.7	–
June	88.3	54.9	71.6	0.2	–
July	93.2	56.6	74.9	0	–
August	92.1	55.6	73.9	0	–
September	88.5	53.5	71	0.1	–
October	78.9	48.1	63.5	0.7	–
November	66.7	40.7	53.7	1.1	–
December	56.3	36.4	46.4	2.3	–

What to plant when in Manteca

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: January 14 · Transplant out: March 4
Peppers	warm	Start seeds indoors: December 31 · Transplant out: March 11
Cucumbers	warm	Direct sow: March 4
Zucchini / squash	warm	Direct sow: March 4
Bush beans	warm	Direct sow: March 4
Sweet corn	warm	Direct sow: March 4
Basil	warm	Transplant out: March 4
Peas	cool	Sow (spring): January 21 · Sow (fall): October 1
Spinach	cool	Sow (spring): January 14 · Sow (fall): October 1
Lettuce	cool	Sow (spring): January 28 · Sow (fall): October 1
Kale	cool	Transplant (spring): February 4 · Sow (fall): September 17
Broccoli	cool	Transplant (spring): February 11
Carrots	cool	Sow (spring): February 4 · Sow (fall): September 17
Onions	cool	Transplant (spring): January 28
Potatoes	cool	Plant seed potatoes: February 11
Radishes	cool	Sow (spring): January 28 · Sow (fall): October 15

Dates are computed from Manteca'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 California

Tracy, CA Modesto, CA Stockton, CA Ceres, CA Livermore, CA Turlock, CA Brentwood, CA Lodi, CA

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 — Tracy Carbona, CA, 7.3 mi (confidence: high). Monthly weather normals: Tracy Carbona, CA, 7.3 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.