When is the last frost in Livermore, CA?

The average last spring frost (50% probability of 32°F) in Livermore is around May 3, based on NOAA/NCEI 1991–2020 normals at the Mt Hamilton, CA station (12.7 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 Livermore?

The average first fall frost in Livermore, CA is around November 18, giving roughly a 197-day frost-free growing season.

What planting zone is Livermore, CA?

Livermore 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 Livermore?

In Livermore, CA the warmest month is July (avg high 78.7°F) and the coldest is February (avg low 37.8°F). It averages about 27.3″ of precipitation a year and 18.1″ of snow.

Home › California › Livermore

Livermore, CA Planting Calendar & Frost Dates

USDA hardiness zone 9b · ZIP 94550 · elevation 1282′ · NOAA & USDA data

Livermore is in USDA hardiness zone 9b (winters can dip to 25 to 30°F), with a growing season of about 197 days between the average last spring frost (May 3) and first fall frost (November 18). The warmest month is July (avg high 78.7°F); the coldest is February (avg low 37.8°F). It averages 27.3″ of precipitation a year and 18.1″ 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 25 to 30°F

Last spring frost

May 3

avg (50% prob, 32°F)

First fall frost

November 18

avg (50% prob, 32°F)

Growing season

197 days

frost-free window

Warmest month

July

avg high 78.7°F

Month-by-month typical weather in Livermore

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Mt Hamilton, CA (12.7 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	49.6	39.1	44.4	5	4.2
February	48.7	37.8	43.2	4.8	5.3
March	51.2	38.9	45.1	4.4	3.8
April	55.2	40.7	48	2.2	1.8
May	62.3	47.4	54.9	1.3	0
June	71.1	55.9	63.5	0.3	0
July	78.7	65.1	71.9	0	0
August	78.5	64.6	71.5	0.1	0
September	74.5	60.3	67.4	0.2	0
October	65.5	52.4	58.9	1.3	0
November	54.7	43.4	49.1	3	0.9
December	48.6	38	43.3	4.7	2.1

What to plant when in Livermore

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: March 22 · Transplant out: May 10
Peppers	warm	Start seeds indoors: March 8 · Transplant out: May 17
Cucumbers	warm	Direct sow: May 10
Zucchini / squash	warm	Direct sow: May 10
Bush beans	warm	Direct sow: May 10
Sweet corn	warm	Direct sow: May 10
Basil	warm	Transplant out: May 10
Peas	cool	Sow (spring): March 29 · Sow (fall): September 23
Spinach	cool	Sow (spring): March 22 · Sow (fall): September 23
Lettuce	cool	Sow (spring): April 5 · Sow (fall): September 23
Kale	cool	Transplant (spring): April 12 · Sow (fall): September 9
Broccoli	cool	Transplant (spring): April 19
Carrots	cool	Sow (spring): April 12 · Sow (fall): September 9
Onions	cool	Transplant (spring): April 5
Potatoes	cool	Plant seed potatoes: April 19
Radishes	cool	Sow (spring): April 5 · Sow (fall): October 7

Dates are computed from Livermore'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 — Mt Hamilton, CA, 12.7 mi (confidence: medium). Monthly weather normals: Mt Hamilton, CA, 12.7 mi (confidence: medium). 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.