Livermore, CA Frost Dates & Growing Season

The two dates every Livermore garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Feb 15
~50% chance of frost after
First fall frost
Dec 2
~50% chance of frost before
Growing season
290 days
frost-free stretch
USDA zone
≈ 9b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Jan 12 Feb 15 Mar 13
First fall frost Dec 28 Dec 2 Nov 16
Hard freeze (28°F), median last Jan 10 · first Dec 18

Computed from NOAA 1991–2020 climate normals at the LIVERMORE station. "Safe" means frost past that date happens only about one year in ten. Your exact garden can still run days either way with elevation and terrain — check your own ZIP with the frost date lookup.

Planting windows for Livermore

Computed from Livermore's own frost dates. Click any crop for the full zone-9 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Dec 21 – Jan 4 Feb 22 – Mar 1
🫑 Peppers Dec 7 – Dec 21 Mar 1 – Mar 8
🥬 Lettuce Jan 4 – Jan 18 Jan 18 – Feb 1 Jan 18 – Feb 15
🫛 Peas Jan 4 – Jan 18
🥕 Carrots Jan 25 – Feb 15
🥦 Broccoli Dec 28 – Jan 11 Jan 25 – Feb 8
🥬 Kale Jan 4 – Jan 18 Jan 18 – Feb 1 Jan 18 – Feb 1
🥒 Cucumbers Jan 18 – Jan 25 Feb 22 – Mar 1 Feb 22 – Mar 1
🥒 Zucchini Jan 18 – Jan 25 Feb 22 – Mar 1 Feb 22 – Mar 1
🫘 Green Beans (Bush) Feb 22 – Mar 1
🌽 Sweet Corn Feb 22 – Mar 1
🌿 Basil Jan 4 – Jan 18 Feb 22 – Mar 1 Mar 1 – Mar 8
🧄 Garlic Fall: Oct 21 – Nov 18

Want this for all 50 crops, or as a printable seed-shelf schedule? Use the planting calendar and the seed starting scheduler — both can use Livermore's dates automatically after a lookup.

Reading the season in Livermore

With roughly 290 frost-free days, Livermore gardens fit long-season crops — melons, winter squash, sweet potatoes — with room left for spring and fall rounds of greens and roots. The first frost around Dec 2 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Livermore, CA?

The average last spring frost in Livermore is around Feb 15, based on 1991–2020 climate normals. That's a median — about half of years see a later frost, so tender crops are safest going out a week or two after this date.

When is the first frost in Livermore, CA?

The average first fall frost in Livermore arrives around Dec 2. Crops still in the garden need to mature before then, and frost-tender plants need harvesting or protection as the date approaches.

How long is the growing season in Livermore?

About 290 frost-free days on average, from Feb 15 to Dec 2. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Livermore in?

USDA zone 9b on the 2023 Plant Hardiness Zone Map. Note that zones describe winter cold, not frost timing — these frost dates are the numbers to plan plantings around.