Del Rio International Airport, TX Frost Dates & Growing Season

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

Last spring frost
Feb 16
~50% chance of frost after
First fall frost
Dec 3
~50% chance of frost before
Growing season
290 days
frost-free stretch
USDA zone
≈ 9a
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Jan 19 Feb 16 Mar 10
First fall frost Dec 26 Dec 3 Nov 14
Hard freeze (28°F), median last Jan 24 · first Dec 18

Computed from NOAA 1991–2020 climate normals at the DEL RIO INTL 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 Del Rio International Airport

Computed from Del Rio International Airport'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 22 – Jan 5 Feb 23 – Mar 2
🫑 Peppers Dec 8 – Dec 22 Mar 2 – Mar 9
🥬 Lettuce Jan 5 – Jan 19 Jan 19 – Feb 2 Jan 19 – Feb 16
🫛 Peas Jan 5 – Jan 19
🥕 Carrots Jan 26 – Feb 16
🥦 Broccoli Dec 29 – Jan 12 Jan 26 – Feb 9
🥬 Kale Jan 5 – Jan 19 Jan 19 – Feb 2 Jan 19 – Feb 2
🥒 Cucumbers Jan 19 – Jan 26 Feb 23 – Mar 2 Feb 23 – Mar 2
🥒 Zucchini Jan 19 – Jan 26 Feb 23 – Mar 2 Feb 23 – Mar 2
🫘 Green Beans (Bush) Feb 23 – Mar 2
🌽 Sweet Corn Feb 23 – Mar 2
🌿 Basil Jan 5 – Jan 19 Feb 23 – Mar 2 Mar 2 – Mar 9
🧄 Garlic Fall: Oct 22 – Nov 19

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 Del Rio International Airport's dates automatically after a lookup.

Reading the season in Del Rio International Airport

With roughly 290 frost-free days, Del Rio International 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 3 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Del Rio International Airport, TX?

The average last spring frost in Del Rio International Airport is around Feb 16, 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 Del Rio International Airport, TX?

The average first fall frost in Del Rio International Airport arrives around Dec 3. 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 Del Rio International Airport?

About 290 frost-free days on average, from Feb 16 to Dec 3. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Del Rio International Airport in?

USDA zone 9a 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.