Fall in zone 6bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 73939 (Goodwell, OK)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Goodwell Rsch STN, OK (16 miles away).
- Average last spring frostApr 2450% chance of a 32°F freeze after this date
- Average first fall frostOct 1950% chance of a 32°F freeze by this date
- Growing season (frost-free)178 daysmedian, 32°F threshold
- USDA hardiness zone6b-5 to 0°F avg. coldest night
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This week in your yard
As of Oct 18, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
54°F 50–55°F
24-hour average · latest 54°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Goodwell 2 E (16 mi), Goodwell 2 SE (17 mi).
4-inch depth
56°F 55°F or warmer
24-hour average · latest 57°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Goodwell 2 E (16 mi), Goodwell 2 SE (17 mi).
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
The latest National Weather Service 7-day forecast and any Frost Advisory or Freeze Warning for 73939 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 56°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent (annual bluegrass, winter weeds): window open as soil cools through the 70s and 60s.
Fertilizer window
Lawn region: South Central plains. Timing only; always follow the product label.
- Bermudagrass (warm-season): Spring: Several weeks after the lawn is fully green (April–May) (about Jun 9 here, using green-up about 3–4 weeks after your average last frost); Summer: Every 4–6 weeks through mid-August (heaviest feeder of the group); Late: Light, low-nitrogen/high-potassium feeding about 4 weeks before first frost, or skip. Avoid: Heavy late-fall nitrogen (linked to spring dead spot).
- Tall fescue (cool-season): Early fall: September (main feeding); Late fall: November, while still green; Late winter: Optional light feeding February–March. Avoid: Feeding after mid-spring and through summer in the transition zone (stress and brown patch).
Plant now
No vegetable planting windows are open this week.
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Oct 19: skip heavy pruning in the 6–8 weeks before it, because new growth may not harden off in time.
Spring-flowering shrubs are pruned right after their flowers fade, not by date. See the pruning guide.
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | Apr 8 |
| 50% (the "average" last frost) | Apr 24 |
| 10% (cautious: only 1 year in 10 freezes later) | May 6 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Oct 6 |
| 50% (the "average" first frost) | Oct 19 |
| 90% (late: most years have frozen by now) | Nov 1 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 2 | Oct 11 |
| 32°F (freeze) | Apr 24 | Oct 19 |
| 28°F (hard freeze) | Apr 13 | Oct 29 |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
Vegetable planting calendar for 73939
Dates count from your average last spring frost (Apr 24) and first fall frost (Oct 19). Half of years have a frost after the spring date, so give tender crops (tomatoes, peppers, squash) some slack.
| Crop | Start indoors | Spring planting | Fall planting |
|---|---|---|---|
| Tomato | Feb 27–Mar 13 | May 1–15 (transplant) | – |
| Pepper (sweet and hot) | Feb 13–27 | May 8–22 (transplant) | – |
| Eggplant | Feb 13–27 | May 8–22 (transplant) | – |
| Tomatillo | Feb 27–Mar 13 | May 1–15 (transplant) | – |
| Lettuce | Feb 27–Mar 13 | Apr 3–24 (transplant) Mar 27–May 8 (sow outdoors) | Aug 24–Sep 14 (transplant) Aug 10–Sep 7 (sowing) |
| Spinach | – | Mar 13–Apr 3 (sow outdoors) | Aug 24–Sep 14 (sowing) |
| Kale | Feb 27–Mar 13 | Mar 27–Apr 10 (transplant) Mar 27–Apr 10 (sow outdoors) | Jul 27–Aug 24 (transplant) Jul 13–Aug 10 (sowing) |
| Collards | Feb 27–Mar 13 | Mar 27–Apr 24 (transplant) Mar 27–Apr 24 (sow outdoors) | Jul 27–Aug 24 (transplant) Jul 13–Aug 10 (sowing) |
| Broccoli | Feb 13–27 | Mar 27–Apr 10 (transplant) | Jul 13–Aug 10 (transplant) |
| Cabbage | Feb 13–27 | Mar 27–Apr 10 (transplant) | Jul 13–Aug 10 (transplant) |
| Cauliflower | Feb 13–27 | Apr 10–24 (transplant) | Jul 13–Aug 10 (transplant) |
| Brussels sprouts | Jan 30–Feb 13 | Mar 27–Apr 10 (transplant) | Jun 29–Jul 20 (transplant) |
| Kohlrabi | Feb 27–Mar 13 | Mar 27–Apr 10 (transplant) Mar 27–Apr 10 (sow outdoors) | Aug 10–24 (sowing) |
| Bok choy / Asian greens | – | Mar 27–Apr 10 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Arugula | – | Mar 27–Apr 24 (sow outdoors) | Aug 24–Sep 21 (sowing) |
| Mustard greens | – | Mar 27–Apr 17 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Swiss chard | Mar 13–27 | Apr 10–May 1 (transplant) Apr 10–May 8 (sow outdoors) | Aug 10–24 (sowing) |
| Beet | – | Mar 27–Apr 24 (sow outdoors) | Aug 10–24 (sowing) |
| Carrot | – | Apr 3–May 1 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Radish | – | Mar 20–May 1 (sow outdoors) | Sep 7–21 (sowing) |
| Turnip | – | Mar 27–Apr 17 (sow outdoors) | Aug 10–24 (sowing) |
| Parsnip | – | Apr 3–24 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 27–Mar 27 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Onion (bulbing) | Jan 30–Feb 13 | Mar 13–27 (transplant) | – |
| Green onion / scallion | – | Mar 13–Apr 10 (sow outdoors) | Aug 10–24 (sowing) |
| Leek | Jan 30–Feb 13 | Mar 27–Apr 10 (transplant) | – |
| Garlic | – | – | Sep 7–Oct 5 (sowing) |
| Shallot | – | Mar 13–27 (transplant) | Sep 7–Oct 5 (sowing) |
| Potato | – | Mar 27–Apr 10 (transplant) | Jun 29–Jul 13 (transplant) |
| Sweet potato | – | May 15–29 (transplant) | – |
| Sweet corn | – | May 1–15 (sow outdoors) | – |
| Bean, bush (snap) | – | May 1–15 (sow outdoors) | – |
| Bean, pole | – | May 1–15 (sow outdoors) | – |
| Lima bean | – | May 8–22 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 15–Jun 5 (sow outdoors) | – |
| Cucumber | Mar 27–Apr 3 | May 1–15 (transplant) May 1–15 (sow outdoors) | – |
| Summer squash / zucchini | Mar 27–Apr 3 | May 1–15 (transplant) May 1–15 (sow outdoors) | – |
| Winter squash | Mar 27–Apr 3 | May 1–15 (transplant) May 1–15 (sow outdoors) | – |
| Pumpkin | – | May 1–15 (sow outdoors) | – |
| Watermelon | Mar 27–Apr 3 | May 8–22 (transplant) May 8–22 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 27–Apr 3 | May 8–22 (transplant) May 8–22 (sow outdoors) | – |
| Okra | Mar 13–27 | May 8–22 (transplant) May 8–22 (sow outdoors) | – |
| Celery | Jan 30–Feb 13 | May 1–8 (transplant) | – |
| Basil | Mar 13–27 | May 1–15 (transplant) May 1–15 (sow outdoors) | – |
| Cilantro | – | Apr 10–May 8 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Parsley | Feb 13–27 | Apr 10–24 (transplant) Apr 3–24 (sow outdoors) | – |
| Dill | – | Apr 24–May 8 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Sunflower | – | Apr 24–May 8 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 27–Apr 10 (transplant) | – |
| Rhubarb (crowns) | – | Mar 27–Apr 10 (transplant) | – |
| Strawberry (plants) | – | Mar 27–Apr 10 (transplant) | Aug 10–Sep 7 (transplant) |
Typical ranges from university extension planting calendars, adjusted to your frost dates. Probabilities, not guarantees. Fall windows that would overlap spring planting are left out, as are fall crops of frost-tender plants where the frost-free season is under 210 days.
Plants that do well here
Oklahoma has a university or garden plant program: Oklahoma Proven. Plant frost-tender annuals after April 24 here (the average last frost). Not affiliated with the program.
Where these numbers come from
Station: Goodwell Rsch STN, OK (NOAA GHCN-Daily ID USC00343628), elevation 3,278 ft, 16.0 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Goodwell 2 E, OK | 16 mi | Apr 22 | Oct 22 |
| Elkhart, KS | 17 mi | Apr 19 | Oct 23 |
| Guymon Muni AP, OK | 17 mi | Apr 18 | Oct 23 |
The average last-frost dates of these stations span 6 days, a rough guide to local variation. See data sources & methods.
Frost questions for 73939
When is the last frost in 73939?
The average (50% chance) last spring freeze of 32°F for ZIP 73939 is April 24. For a more cautious planting date, use May 6, when only 1 year in 10 still sees a later freeze.
When is the first frost in 73939?
The average first fall freeze is October 19. In 1 year in 10 it comes by October 6.
What hardiness zone is 73939?
ZIP 73939 is in USDA zone 6b (-5 to 0°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 73939 right now?
This page shows the latest 2-inch and 4-inch soil temperature from the nearest public soil station (USDA SCAN, NOAA USCRN or TexMesonet), or a labeled estimate when no station is close, against the 50–55°F spring pre-emergent band.
Nearby ZIP codes
73942 Guymon 73949 Texhoma 73960 Texhoma 67950 Elkhart 73947 Keyes 67954 Rolla 67953 Richfield 73945 Hooker
Other ZIP codes in Texas County
73901 73942 73944 73945 73949 73951 All Texas County frost dates · Oklahoma frost dates
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Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.