Fall in zone 6aPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 66948 (Jamestown, 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, Concordia 1 W, KS (10 miles away).
- Average last spring frostApr 2150% 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)177 daysmedian, 32°F threshold
- USDA hardiness zone6a-10 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
No soil station with a fresh reading within 62 miles.
4-inch depth
No soil station with a fresh reading within 62 miles.
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 66948 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
No soil reading near this ZIP. Typical extension timing for your region: spring early March to early April; fall late August to mid-September.
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 Jun 6 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 7 |
| 50% (the "average" last frost) | Apr 21 |
| 10% (cautious: only 1 year in 10 freezes later) | May 5 |
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 2 |
| 50% (the "average" first frost) | Oct 19 |
| 90% (late: most years have frozen by now) | Oct 31 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 1 | Oct 10 |
| 32°F (freeze) | Apr 21 | Oct 19 |
| 28°F (hard freeze) | Apr 11 | Oct 28 |
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 66948
Dates count from your average last spring frost (Apr 21) 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 24–Mar 10 | Apr 28–May 12 (transplant) | – |
| Pepper (sweet and hot) | Feb 10–24 | May 5–19 (transplant) | – |
| Eggplant | Feb 10–24 | May 5–19 (transplant) | – |
| Tomatillo | Feb 24–Mar 10 | Apr 28–May 12 (transplant) | – |
| Lettuce | Feb 24–Mar 10 | Mar 31–Apr 21 (transplant) Mar 24–May 5 (sow outdoors) | Aug 24–Sep 14 (transplant) Aug 10–Sep 7 (sowing) |
| Spinach | – | Mar 10–31 (sow outdoors) | Aug 24–Sep 14 (sowing) |
| Kale | Feb 24–Mar 10 | Mar 24–Apr 7 (transplant) Mar 24–Apr 7 (sow outdoors) | Jul 27–Aug 24 (transplant) Jul 13–Aug 10 (sowing) |
| Collards | Feb 24–Mar 10 | Mar 24–Apr 21 (transplant) Mar 24–Apr 21 (sow outdoors) | Jul 27–Aug 24 (transplant) Jul 13–Aug 10 (sowing) |
| Broccoli | Feb 10–24 | Mar 24–Apr 7 (transplant) | Jul 13–Aug 10 (transplant) |
| Cabbage | Feb 10–24 | Mar 24–Apr 7 (transplant) | Jul 13–Aug 10 (transplant) |
| Cauliflower | Feb 10–24 | Apr 7–21 (transplant) | Jul 13–Aug 10 (transplant) |
| Brussels sprouts | Jan 27–Feb 10 | Mar 24–Apr 7 (transplant) | Jun 29–Jul 20 (transplant) |
| Kohlrabi | Feb 24–Mar 10 | Mar 24–Apr 7 (transplant) Mar 24–Apr 7 (sow outdoors) | Aug 10–24 (sowing) |
| Bok choy / Asian greens | – | Mar 24–Apr 7 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Arugula | – | Mar 24–Apr 21 (sow outdoors) | Aug 24–Sep 21 (sowing) |
| Mustard greens | – | Mar 24–Apr 14 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Swiss chard | Mar 10–24 | Apr 7–28 (transplant) Apr 7–May 5 (sow outdoors) | Aug 10–24 (sowing) |
| Beet | – | Mar 24–Apr 21 (sow outdoors) | Aug 10–24 (sowing) |
| Carrot | – | Mar 31–Apr 28 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Radish | – | Mar 17–Apr 28 (sow outdoors) | Sep 7–21 (sowing) |
| Turnip | – | Mar 24–Apr 14 (sow outdoors) | Aug 10–24 (sowing) |
| Parsnip | – | Mar 31–Apr 21 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 24–Mar 24 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Onion (bulbing) | Jan 27–Feb 10 | Mar 10–24 (transplant) | – |
| Green onion / scallion | – | Mar 10–Apr 7 (sow outdoors) | Aug 10–24 (sowing) |
| Leek | Jan 27–Feb 10 | Mar 24–Apr 7 (transplant) | – |
| Garlic | – | – | Sep 7–Oct 5 (sowing) |
| Shallot | – | Mar 10–24 (transplant) | Sep 7–Oct 5 (sowing) |
| Potato | – | Mar 24–Apr 7 (transplant) | Jun 29–Jul 13 (transplant) |
| Sweet potato | – | May 12–26 (transplant) | – |
| Sweet corn | – | Apr 28–May 12 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 28–May 12 (sow outdoors) | – |
| Bean, pole | – | Apr 28–May 12 (sow outdoors) | – |
| Lima bean | – | May 5–19 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 12–Jun 2 (sow outdoors) | – |
| Cucumber | Mar 24–31 | Apr 28–May 12 (transplant) Apr 28–May 12 (sow outdoors) | – |
| Summer squash / zucchini | Mar 24–31 | Apr 28–May 12 (transplant) Apr 28–May 12 (sow outdoors) | – |
| Winter squash | Mar 24–31 | Apr 28–May 12 (transplant) Apr 28–May 12 (sow outdoors) | – |
| Pumpkin | – | Apr 28–May 12 (sow outdoors) | – |
| Watermelon | Mar 24–31 | May 5–19 (transplant) May 5–19 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 24–31 | May 5–19 (transplant) May 5–19 (sow outdoors) | – |
| Okra | Mar 10–24 | May 5–19 (transplant) May 5–19 (sow outdoors) | – |
| Celery | Jan 27–Feb 10 | Apr 28–May 5 (transplant) | – |
| Basil | Mar 10–24 | Apr 28–May 12 (transplant) Apr 28–May 12 (sow outdoors) | – |
| Cilantro | – | Apr 7–May 5 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Parsley | Feb 10–24 | Apr 7–21 (transplant) Mar 31–Apr 21 (sow outdoors) | – |
| Dill | – | Apr 21–May 5 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Sunflower | – | Apr 21–May 5 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 24–Apr 7 (transplant) | – |
| Rhubarb (crowns) | – | Mar 24–Apr 7 (transplant) | – |
| Strawberry (plants) | – | Mar 24–Apr 7 (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
Kansas has a university or garden plant program: Prairie Star Flowers. Plant frost-tender annuals after April 21 here (the average last frost). Not affiliated with the program.
Where these numbers come from
Station: Concordia 1 W, KS (NOAA GHCN-Daily ID USC00141761), elevation 1,481 ft, 10.1 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Concordia Muni AP, KS | 11 mi | Apr 18 | Oct 19 |
| Courtland, KS | 13 mi | Apr 17 | Oct 21 |
| Beloit, KS | 17 mi | Apr 19 | Oct 19 |
The average last-frost dates of these stations span 4 days, a rough guide to local variation. See data sources & methods.
Frost questions for 66948
When is the last frost in 66948?
The average (50% chance) last spring freeze of 32°F for ZIP 66948 is April 21. For a more cautious planting date, use May 5, when only 1 year in 10 still sees a later freeze.
When is the first frost in 66948?
The average first fall freeze is October 19. In 1 year in 10 it comes by October 2.
What hardiness zone is 66948?
ZIP 66948 is in USDA zone 6a (-10 to -5°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 66948 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
66961 Norway 66963 Randall 66901 Concordia 66966 Scandia 66942 Formoso 67478 Simpson 67445 Glasco 66939 Courtland
Other ZIP codes in Cloud County
66901 66938 67417 67445 67466 All Cloud County frost dates · Kansas frost dates
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- 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.