Blythe Airport, CA Frost Dates & Growing Season

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

Last spring frost
Jan 5
~50% chance of frost after
First fall frost
Dec 21
~50% chance of frost before
Growing season
350 days
frost-free stretch
USDA zone
≈ 10b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Dec 15 Jan 5 Feb 18
First fall frost Jan 18 Dec 21 Dec 2
Hard freeze (28°F), median last Dec 31 · first Dec 30

Computed from NOAA 1991–2020 climate normals at the BLYTHE AP 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 Blythe Airport

Computed from Blythe Airport's own frost dates. Click any crop for the full zone-10 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Nov 10 – Nov 24 Jan 12 – Jan 19
🫑 Peppers Oct 27 – Nov 10 Jan 19 – Jan 26
🥬 Lettuce Nov 24 – Dec 8 Dec 8 – Dec 22 Dec 8 – Jan 5
🫛 Peas Nov 24 – Dec 8
🥕 Carrots Dec 15 – Jan 5
🥦 Broccoli Nov 17 – Dec 1 Dec 15 – Dec 29
🥬 Kale Nov 24 – Dec 8 Dec 8 – Dec 22 Dec 8 – Dec 22
🥒 Cucumbers Dec 8 – Dec 15 Jan 12 – Jan 19 Jan 12 – Jan 19
🥒 Zucchini Dec 8 – Dec 15 Jan 12 – Jan 19 Jan 12 – Jan 19
🫘 Green Beans (Bush) Jan 12 – Jan 19
🌽 Sweet Corn Jan 12 – Jan 19
🌿 Basil Nov 24 – Dec 8 Jan 12 – Jan 19 Jan 19 – Jan 26
🧄 Garlic Fall: Nov 9 – Dec 7

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 Blythe Airport's dates automatically after a lookup.

Reading the season in Blythe Airport

With roughly 350 frost-free days, Blythe Airport 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 21 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Blythe Airport, CA?

The average last spring frost in Blythe Airport is around Jan 5, 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 Blythe Airport, CA?

The average first fall frost in Blythe Airport arrives around Dec 21. 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 Blythe Airport?

About 350 frost-free days on average, from Jan 5 to Dec 21. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Blythe Airport in?

USDA zone 10b 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.