Clearlake 4 SE, CA Frost Dates & Growing Season

The two dates every Clearlake 4 SE garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Apr 10
~50% chance of frost after
First fall frost
Nov 6
~50% chance of frost before
Growing season
210 days
frost-free stretch
USDA zone
≈ 7a
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Mar 24 Apr 10 Apr 30
First fall frost Nov 20 Nov 6 Oct 24
Hard freeze (28°F), median last Mar 14 · first Nov 21

Computed from NOAA 1991–2020 climate normals at the CLEARLAKE 4 SE 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 Clearlake 4 SE

Computed from Clearlake 4 SE's own frost dates. Click any crop for the full zone-7 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Feb 13 – Feb 27 Apr 17 – Apr 24
🫑 Peppers Jan 30 – Feb 13 Apr 24 – May 1
🥬 Lettuce Feb 27 – Mar 13 Mar 13 – Mar 27 Mar 13 – Apr 10
🫛 Peas Feb 27 – Mar 13
🥕 Carrots Mar 20 – Apr 10
🥦 Broccoli Feb 20 – Mar 6 Mar 20 – Apr 3
🥬 Kale Feb 27 – Mar 13 Mar 13 – Mar 27 Mar 13 – Mar 27
🥒 Cucumbers Mar 13 – Mar 20 Apr 17 – Apr 24 Apr 17 – Apr 24
🥒 Zucchini Mar 13 – Mar 20 Apr 17 – Apr 24 Apr 17 – Apr 24
🫘 Green Beans (Bush) Apr 17 – Apr 24
🌽 Sweet Corn Apr 17 – Apr 24
🌿 Basil Feb 27 – Mar 13 Apr 17 – Apr 24 Apr 24 – May 1
🧄 Garlic Fall: Sep 25 – Oct 23

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 Clearlake 4 SE's dates automatically after a lookup.

Reading the season in Clearlake 4 SE

With roughly 210 frost-free days, Clearlake 4 SE 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 Nov 6 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Clearlake 4 SE, CA?

The average last spring frost in Clearlake 4 SE is around Apr 10, 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 Clearlake 4 SE, CA?

The average first fall frost in Clearlake 4 SE arrives around Nov 6. 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 Clearlake 4 SE?

About 210 frost-free days on average, from Apr 10 to Nov 6. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Clearlake 4 SE in?

USDA zone 7a 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.