Frost dates for ZIP 66541 (Summerfield, 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, Baileyville, KS (13 miles away).
- Average last spring frostApr 2250% chance of a 32°F freeze after this date
- Average first fall frostOct 1350% chance of a 32°F freeze by this date
- Growing season (frost-free)173 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 17, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
56°F 55°F or warmer
24-hour average · latest 56°F, as of Oct 17, 10:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Centralia Lake (21 mi), Lincoln 11 SW (57 mi), Rogers Farm #1 (60 mi).
4-inch depth
56°F 55°F or warmer
24-hour average · latest 57°F, as of Oct 17, 10:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Centralia Lake (21 mi), Lincoln 11 SW (57 mi), Rogers Farm #1 (60 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 66541 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: 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 7 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.
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 10 |
| 50% (the "average" last frost) | Apr 22 |
| 10% (cautious: only 1 year in 10 freezes later) | May 2 |
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) | Sep 27 |
| 50% (the "average" first frost) | Oct 13 |
| 90% (late: most years have frozen by now) | Oct 25 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 30 | Oct 3 |
| 32°F (freeze) | Apr 22 | Oct 13 |
| 28°F (hard freeze) | Apr 14 | Oct 23 |
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 66541
Dates count from your average last spring frost (Apr 22) and first fall frost (Oct 13). 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 25–Mar 11 | Apr 29–May 13 (transplant) | – |
| Pepper (sweet and hot) | Feb 11–25 | May 6–20 (transplant) | – |
| Eggplant | Feb 11–25 | May 6–20 (transplant) | – |
| Tomatillo | Feb 25–Mar 11 | Apr 29–May 13 (transplant) | – |
| Lettuce | Feb 25–Mar 11 | Apr 1–22 (transplant) Mar 25–May 6 (sow outdoors) | Aug 18–Sep 8 (transplant) Aug 4–Sep 1 (sowing) |
| Spinach | – | Mar 11–Apr 1 (sow outdoors) | Aug 18–Sep 8 (sowing) |
| Kale | Feb 25–Mar 11 | Mar 25–Apr 8 (transplant) Mar 25–Apr 8 (sow outdoors) | Jul 21–Aug 18 (transplant) Jul 7–Aug 4 (sowing) |
| Collards | Feb 25–Mar 11 | Mar 25–Apr 22 (transplant) Mar 25–Apr 22 (sow outdoors) | Jul 21–Aug 18 (transplant) Jul 7–Aug 4 (sowing) |
| Broccoli | Feb 11–25 | Mar 25–Apr 8 (transplant) | Jul 7–Aug 4 (transplant) |
| Cabbage | Feb 11–25 | Mar 25–Apr 8 (transplant) | Jul 7–Aug 4 (transplant) |
| Cauliflower | Feb 11–25 | Apr 8–22 (transplant) | Jul 7–Aug 4 (transplant) |
| Brussels sprouts | Jan 28–Feb 11 | Mar 25–Apr 8 (transplant) | Jun 23–Jul 14 (transplant) |
| Kohlrabi | Feb 25–Mar 11 | Mar 25–Apr 8 (transplant) Mar 25–Apr 8 (sow outdoors) | Aug 4–18 (sowing) |
| Bok choy / Asian greens | – | Mar 25–Apr 8 (sow outdoors) | Aug 18–Sep 1 (sowing) |
| Arugula | – | Mar 25–Apr 22 (sow outdoors) | Aug 18–Sep 15 (sowing) |
| Mustard greens | – | Mar 25–Apr 15 (sow outdoors) | Aug 18–Sep 1 (sowing) |
| Swiss chard | Mar 11–25 | Apr 8–29 (transplant) Apr 8–May 6 (sow outdoors) | Aug 4–18 (sowing) |
| Beet | – | Mar 25–Apr 22 (sow outdoors) | Aug 4–18 (sowing) |
| Carrot | – | Apr 1–29 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Radish | – | Mar 18–Apr 29 (sow outdoors) | Sep 1–15 (sowing) |
| Turnip | – | Mar 25–Apr 15 (sow outdoors) | Aug 4–18 (sowing) |
| Parsnip | – | Apr 1–22 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 25–Mar 25 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Onion (bulbing) | Jan 28–Feb 11 | Mar 11–25 (transplant) | – |
| Green onion / scallion | – | Mar 11–Apr 8 (sow outdoors) | Aug 4–18 (sowing) |
| Leek | Jan 28–Feb 11 | Mar 25–Apr 8 (transplant) | – |
| Garlic | – | – | Sep 1–29 (sowing) |
| Shallot | – | Mar 11–25 (transplant) | Sep 1–29 (sowing) |
| Potato | – | Mar 25–Apr 8 (transplant) | Jun 23–Jul 7 (transplant) |
| Sweet potato | – | May 13–27 (transplant) | – |
| Sweet corn | – | Apr 29–May 13 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 29–May 13 (sow outdoors) | – |
| Bean, pole | – | Apr 29–May 13 (sow outdoors) | – |
| Lima bean | – | May 6–20 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 13–Jun 3 (sow outdoors) | – |
| Cucumber | Mar 25–Apr 1 | Apr 29–May 13 (transplant) Apr 29–May 13 (sow outdoors) | – |
| Summer squash / zucchini | Mar 25–Apr 1 | Apr 29–May 13 (transplant) Apr 29–May 13 (sow outdoors) | – |
| Winter squash | Mar 25–Apr 1 | Apr 29–May 13 (transplant) Apr 29–May 13 (sow outdoors) | – |
| Pumpkin | – | Apr 29–May 13 (sow outdoors) | – |
| Watermelon | Mar 25–Apr 1 | May 6–20 (transplant) May 6–20 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 25–Apr 1 | May 6–20 (transplant) May 6–20 (sow outdoors) | – |
| Okra | Mar 11–25 | May 6–20 (transplant) May 6–20 (sow outdoors) | – |
| Celery | Jan 28–Feb 11 | Apr 29–May 6 (transplant) | – |
| Basil | Mar 11–25 | Apr 29–May 13 (transplant) Apr 29–May 13 (sow outdoors) | – |
| Cilantro | – | Apr 8–May 6 (sow outdoors) | Aug 18–Sep 1 (sowing) |
| Parsley | Feb 11–25 | Apr 8–22 (transplant) Apr 1–22 (sow outdoors) | – |
| Dill | – | Apr 22–May 6 (sow outdoors) | Aug 18–Sep 1 (sowing) |
| Sunflower | – | Apr 22–May 6 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 25–Apr 8 (transplant) | – |
| Rhubarb (crowns) | – | Mar 25–Apr 8 (transplant) | – |
| Strawberry (plants) | – | Mar 25–Apr 8 (transplant) | Aug 4–Sep 1 (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 22 here (the average last frost). Not affiliated with the program.
Where these numbers come from
Station: Baileyville, KS (NOAA GHCN-Daily ID USC00140482), elevation 1,296 ft, 13.2 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Pawnee City, NE | 14 mi | Apr 22 | Oct 15 |
| Frankfort 6NE, KS | 14 mi | Apr 20 | Oct 18 |
| Marysville, KS | 18 mi | Apr 25 | Oct 13 |
The average last-frost dates of these stations span 5 days, a rough guide to local variation. See data sources & methods.
Frost questions for 66541
When is the last frost in 66541?
The average (50% chance) last spring freeze of 32°F for ZIP 66541 is April 22. For a more cautious planting date, use May 2, when only 1 year in 10 still sees a later freeze.
When is the first frost in 66541?
The average first fall freeze is October 13. In 1 year in 10 it comes by September 27.
What hardiness zone is 66541?
ZIP 66541 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 66541 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
66406 Beattie 66403 Axtell 68381 Liberty 68323 Burchard 68420 Pawnee City 66518 Oketo 66404 Baileyville 68309 Barneston
Other ZIP codes in Marshall County
66403 66406 66411 66412 66427 66438 66508 66518 66544 66548 All Marshall County frost dates · Kansas frost dates
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