Oceanside Municipal Airport, CA Frost Dates & Growing Season

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

Last spring frost
Jan 23
~50% chance of frost after
First fall frost
Dec 11
~50% chance of frost before
Growing season
322 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 22 Jan 23 Feb 22
First fall frost Jan 15 Dec 11 Nov 21
Hard freeze (28°F), median last Dec 31 · first Dec 23

Computed from NOAA 1991–2020 climate normals at the OCEANSIDE MUNI 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 Oceanside Municipal Airport

Computed from Oceanside Municipal 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 28 – Dec 12 Jan 30 – Feb 6
🫑 Peppers Nov 14 – Nov 28 Feb 6 – Feb 13
🥬 Lettuce Dec 12 – Dec 26 Dec 26 – Jan 9 Dec 26 – Jan 23
🫛 Peas Dec 12 – Dec 26
🥕 Carrots Jan 2 – Jan 23
🥦 Broccoli Dec 5 – Dec 19 Jan 2 – Jan 16
🥬 Kale Dec 12 – Dec 26 Dec 26 – Jan 9 Dec 26 – Jan 9
🥒 Cucumbers Dec 26 – Jan 2 Jan 30 – Feb 6 Jan 30 – Feb 6
🥒 Zucchini Dec 26 – Jan 2 Jan 30 – Feb 6 Jan 30 – Feb 6
🫘 Green Beans (Bush) Jan 30 – Feb 6
🌽 Sweet Corn Jan 30 – Feb 6
🌿 Basil Dec 12 – Dec 26 Jan 30 – Feb 6 Feb 6 – Feb 13
🧄 Garlic Fall: Oct 30 – Nov 27

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 Oceanside Municipal Airport's dates automatically after a lookup.

Reading the season in Oceanside Municipal Airport

With roughly 322 frost-free days, Oceanside Municipal 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 11 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Oceanside Municipal Airport, CA?

The average last spring frost in Oceanside Municipal Airport is around Jan 23, 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 Oceanside Municipal Airport, CA?

The average first fall frost in Oceanside Municipal Airport arrives around Dec 11. 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 Oceanside Municipal Airport?

About 322 frost-free days on average, from Jan 23 to Dec 11. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Oceanside Municipal 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.