Fall in zone 7aPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 66780 (Walnut, KS)
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, Girard, KS (14 miles away).
- Average last spring frostApr 450% chance of a 32°F freeze after this date
- Average first fall frostNov 150% chance of a 32°F freeze by this date
- Growing season (frost-free)209 daysmedian, 32°F threshold
- USDA hardiness zone7a0 to 5°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
59°F 55°F or warmer
24-hour average · latest 57°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Schell-Osage (61 mi).
4-inch depth
61°F 55°F or warmer
24-hour average · latest 59°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Schell-Osage (61 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 66780 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 61°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: Transition zone. Timing only; always follow the product label.
- Bermudagrass (warm-season): Spring: Several weeks after the lawn is fully green (April–May) (about May 20 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
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 1: 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) | Mar 19 |
| 50% (the "average" last frost) | Apr 4 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 21 |
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 17 |
| 50% (the "average" first frost) | Nov 1 |
| 90% (late: most years have frozen by now) | Nov 14 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 15 | Oct 22 |
| 32°F (freeze) | Apr 4 | Nov 1 |
| 28°F (hard freeze) | Mar 26 | Nov 9 |
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 66780
Dates count from your average last spring frost (Apr 4) and first fall frost (Nov 1). 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 7–21 | Apr 11–25 (transplant) | – |
| Pepper (sweet and hot) | Jan 24–Feb 7 | Apr 18–May 2 (transplant) | – |
| Eggplant | Jan 24–Feb 7 | Apr 18–May 2 (transplant) | – |
| Tomatillo | Feb 7–21 | Apr 11–25 (transplant) | – |
| Lettuce | Feb 7–21 | Mar 14–Apr 4 (transplant) Mar 7–Apr 18 (sow outdoors) | Sep 6–27 (transplant) Aug 23–Sep 20 (sowing) |
| Spinach | – | Feb 21–Mar 14 (sow outdoors) | Sep 6–27 (sowing) |
| Kale | Feb 7–21 | Mar 7–21 (transplant) Mar 7–21 (sow outdoors) | Aug 9–Sep 6 (transplant) Jul 26–Aug 23 (sowing) |
| Collards | Feb 7–21 | Mar 7–Apr 4 (transplant) Mar 7–Apr 4 (sow outdoors) | Aug 9–Sep 6 (transplant) Jul 26–Aug 23 (sowing) |
| Broccoli | Jan 24–Feb 7 | Mar 7–21 (transplant) | Jul 26–Aug 23 (transplant) |
| Cabbage | Jan 24–Feb 7 | Mar 7–21 (transplant) | Jul 26–Aug 23 (transplant) |
| Cauliflower | Jan 24–Feb 7 | Mar 21–Apr 4 (transplant) | Jul 26–Aug 23 (transplant) |
| Brussels sprouts | Jan 10–24 | Mar 7–21 (transplant) | Jul 12–Aug 2 (transplant) |
| Kohlrabi | Feb 7–21 | Mar 7–21 (transplant) Mar 7–21 (sow outdoors) | Aug 23–Sep 6 (sowing) |
| Bok choy / Asian greens | – | Mar 7–21 (sow outdoors) | Sep 6–20 (sowing) |
| Arugula | – | Mar 7–Apr 4 (sow outdoors) | Sep 6–Oct 4 (sowing) |
| Mustard greens | – | Mar 7–28 (sow outdoors) | Sep 6–20 (sowing) |
| Swiss chard | Feb 21–Mar 7 | Mar 21–Apr 11 (transplant) Mar 21–Apr 18 (sow outdoors) | Aug 23–Sep 6 (sowing) |
| Beet | – | Mar 7–Apr 4 (sow outdoors) | Aug 23–Sep 6 (sowing) |
| Carrot | – | Mar 14–Apr 11 (sow outdoors) | Aug 9–23 (sowing) |
| Radish | – | Feb 28–Apr 11 (sow outdoors) | Sep 20–Oct 4 (sowing) |
| Turnip | – | Mar 7–28 (sow outdoors) | Aug 23–Sep 6 (sowing) |
| Parsnip | – | Mar 14–Apr 4 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 7–Mar 7 (sow outdoors) | Aug 9–23 (sowing) |
| Onion (bulbing) | Jan 10–24 | Feb 21–Mar 7 (transplant) | – |
| Green onion / scallion | – | Feb 21–Mar 21 (sow outdoors) | Aug 23–Sep 6 (sowing) |
| Leek | Jan 10–24 | Mar 7–21 (transplant) | – |
| Garlic | – | – | Sep 20–Oct 18 (sowing) |
| Shallot | – | Feb 21–Mar 7 (transplant) | Sep 20–Oct 18 (sowing) |
| Potato | – | Mar 7–21 (transplant) | Jul 12–26 (transplant) |
| Sweet potato | – | Apr 25–May 9 (transplant) | – |
| Sweet corn | – | Apr 11–25 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 11–25 (sow outdoors) | – |
| Bean, pole | – | Apr 11–25 (sow outdoors) | – |
| Lima bean | – | Apr 18–May 2 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 25–May 16 (sow outdoors) | – |
| Cucumber | Mar 7–14 | Apr 11–25 (transplant) Apr 11–25 (sow outdoors) | – |
| Summer squash / zucchini | Mar 7–14 | Apr 11–25 (transplant) Apr 11–25 (sow outdoors) | – |
| Winter squash | Mar 7–14 | Apr 11–25 (transplant) Apr 11–25 (sow outdoors) | – |
| Pumpkin | – | Apr 11–25 (sow outdoors) | – |
| Watermelon | Mar 7–14 | Apr 18–May 2 (transplant) Apr 18–May 2 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 7–14 | Apr 18–May 2 (transplant) Apr 18–May 2 (sow outdoors) | – |
| Okra | Feb 21–Mar 7 | Apr 18–May 2 (transplant) Apr 18–May 2 (sow outdoors) | – |
| Celery | Jan 10–24 | Apr 11–18 (transplant) | – |
| Basil | Feb 21–Mar 7 | Apr 11–25 (transplant) Apr 11–25 (sow outdoors) | – |
| Cilantro | – | Mar 21–Apr 18 (sow outdoors) | Sep 6–20 (sowing) |
| Parsley | Jan 24–Feb 7 | Mar 21–Apr 4 (transplant) Mar 14–Apr 4 (sow outdoors) | – |
| Dill | – | Apr 4–18 (sow outdoors) | Sep 6–20 (sowing) |
| Sunflower | – | Apr 4–18 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 7–21 (transplant) | – |
| Rhubarb (crowns) | – | Mar 7–21 (transplant) | – |
| Strawberry (plants) | – | Mar 7–21 (transplant) | Aug 23–Sep 20 (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
Kansas has a university or garden plant program: Prairie Star Flowers. Plant frost-tender annuals after April 4 here (the average last frost). Not affiliated with the program.
Where these numbers come from
Station: Girard, KS (NOAA GHCN-Daily ID USC00143074), elevation 990 ft, 13.8 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Chanute 4E, KS | 18 mi | Apr 8 | Oct 29 |
| Parsons 2 NW, KS | 21 mi | Apr 11 | Oct 26 |
| Chanute Martin Johnson AP, KS | 24 mi | Apr 10 | Oct 28 |
The average last-frost dates of these stations span 7 days, a rough guide to local variation. See data sources & methods.
Frost questions for 66780
When is the last frost in 66780?
The average (50% chance) last spring freeze of 32°F for ZIP 66780 is April 4. For a more cautious planting date, use April 21, when only 1 year in 10 still sees a later freeze.
When is the first frost in 66780?
The average first fall freeze is November 1. In 1 year in 10 it comes by October 17.
What hardiness zone is 66780?
ZIP 66780 is in USDA zone 7a (0 to 5°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 66780 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
66746 Hepler 66775 Stark 66771 St. Paul 66733 Erie 66772 Savonburg 66743 Girard 66734 Farlington 66732 Elsmore
Other ZIP codes in Crawford County
66711 66712 66724 66734 66735 66743 66746 66753 66756 66760 66762 66763 All Crawford County frost dates · Kansas frost dates
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Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- Freeze alerts
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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.