Stillwater Regional Airport, OK Frost Dates & Growing Season

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

Last spring frost
Apr 3
~50% chance of frost after
First fall frost
Oct 31
~50% chance of frost before
Growing season
211 days
frost-free stretch
USDA zone
≈ 7b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Mar 18 Apr 3 Apr 21
First fall frost Nov 14 Oct 31 Oct 15
Hard freeze (28°F), median last Mar 23 · first Nov 8

Computed from NOAA 1991–2020 climate normals at the STILLWATER RGNL 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 Stillwater Regional Airport

Computed from Stillwater Regional Airport'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 6 – Feb 20 Apr 10 – Apr 17
🫑 Peppers Jan 23 – Feb 6 Apr 17 – Apr 24
🥬 Lettuce Feb 20 – Mar 6 Mar 6 – Mar 20 Mar 6 – Apr 3
🫛 Peas Feb 20 – Mar 6
🥕 Carrots Mar 13 – Apr 3
🥦 Broccoli Feb 13 – Feb 27 Mar 13 – Mar 27
🥬 Kale Feb 20 – Mar 6 Mar 6 – Mar 20 Mar 6 – Mar 20
🥒 Cucumbers Mar 6 – Mar 13 Apr 10 – Apr 17 Apr 10 – Apr 17
🥒 Zucchini Mar 6 – Mar 13 Apr 10 – Apr 17 Apr 10 – Apr 17
🫘 Green Beans (Bush) Apr 10 – Apr 17
🌽 Sweet Corn Apr 10 – Apr 17
🌿 Basil Feb 20 – Mar 6 Apr 10 – Apr 17 Apr 17 – Apr 24
🧄 Garlic Fall: Sep 19 – Oct 17

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 Stillwater Regional Airport's dates automatically after a lookup.

Reading the season in Stillwater Regional Airport

With roughly 211 frost-free days, Stillwater Regional 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 Oct 31 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Stillwater Regional Airport, OK?

The average last spring frost in Stillwater Regional Airport is around Apr 3, 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 Stillwater Regional Airport, OK?

The average first fall frost in Stillwater Regional Airport arrives around Oct 31. 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 Stillwater Regional Airport?

About 211 frost-free days on average, from Apr 3 to Oct 31. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Stillwater Regional Airport in?

USDA zone 7b 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.