Fall in zone 6bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 62466 (Sumner, IL)
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, Lawrenceville 2WSW, IL (7 miles away).
- Average last spring frostApr 1250% chance of a 32°F freeze after this date
- Average first fall frostOct 2550% chance of a 32°F freeze by this date
- Growing season (frost-free)193 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
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 62466 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 mid-April to early May.
Fertilizer window
Lawn region: North (cool-season). Timing only; always follow the product label.
- Kentucky bluegrass (cool-season): Early fall: Around Labor Day (late August–September); Late fall: Late October–November, before the ground freezes; Late spring: Optional around Memorial Day. Avoid: Early-spring and midsummer feeding (pushes top growth, favors crabgrass).
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 25: 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 31 |
| 50% (the "average" last frost) | Apr 12 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 30 |
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 12 |
| 50% (the "average" first frost) | Oct 25 |
| 90% (late: most years have frozen by now) | Nov 5 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 24 | Oct 16 |
| 32°F (freeze) | Apr 12 | Oct 25 |
| 28°F (hard freeze) | Apr 1 | Nov 3 |
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 62466
Dates count from your average last spring frost (Apr 12) and first fall frost (Oct 25). 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 15–Mar 1 | Apr 19–May 3 (transplant) | – |
| Pepper (sweet and hot) | Feb 1–15 | Apr 26–May 10 (transplant) | – |
| Eggplant | Feb 1–15 | Apr 26–May 10 (transplant) | – |
| Tomatillo | Feb 15–Mar 1 | Apr 19–May 3 (transplant) | – |
| Lettuce | Feb 15–Mar 1 | Mar 22–Apr 12 (transplant) Mar 15–Apr 26 (sow outdoors) | Aug 30–Sep 20 (transplant) Aug 16–Sep 13 (sowing) |
| Spinach | – | Mar 1–22 (sow outdoors) | Aug 30–Sep 20 (sowing) |
| Kale | Feb 15–Mar 1 | Mar 15–29 (transplant) Mar 15–29 (sow outdoors) | Aug 2–30 (transplant) Jul 19–Aug 16 (sowing) |
| Collards | Feb 15–Mar 1 | Mar 15–Apr 12 (transplant) Mar 15–Apr 12 (sow outdoors) | Aug 2–30 (transplant) Jul 19–Aug 16 (sowing) |
| Broccoli | Feb 1–15 | Mar 15–29 (transplant) | Jul 19–Aug 16 (transplant) |
| Cabbage | Feb 1–15 | Mar 15–29 (transplant) | Jul 19–Aug 16 (transplant) |
| Cauliflower | Feb 1–15 | Mar 29–Apr 12 (transplant) | Jul 19–Aug 16 (transplant) |
| Brussels sprouts | Jan 18–Feb 1 | Mar 15–29 (transplant) | Jul 5–26 (transplant) |
| Kohlrabi | Feb 15–Mar 1 | Mar 15–29 (transplant) Mar 15–29 (sow outdoors) | Aug 16–30 (sowing) |
| Bok choy / Asian greens | – | Mar 15–29 (sow outdoors) | Aug 30–Sep 13 (sowing) |
| Arugula | – | Mar 15–Apr 12 (sow outdoors) | Aug 30–Sep 27 (sowing) |
| Mustard greens | – | Mar 15–Apr 5 (sow outdoors) | Aug 30–Sep 13 (sowing) |
| Swiss chard | Mar 1–15 | Mar 29–Apr 19 (transplant) Mar 29–Apr 26 (sow outdoors) | Aug 16–30 (sowing) |
| Beet | – | Mar 15–Apr 12 (sow outdoors) | Aug 16–30 (sowing) |
| Carrot | – | Mar 22–Apr 19 (sow outdoors) | Aug 2–16 (sowing) |
| Radish | – | Mar 8–Apr 19 (sow outdoors) | Sep 13–27 (sowing) |
| Turnip | – | Mar 15–Apr 5 (sow outdoors) | Aug 16–30 (sowing) |
| Parsnip | – | Mar 22–Apr 12 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 15–Mar 15 (sow outdoors) | Aug 2–16 (sowing) |
| Onion (bulbing) | Jan 18–Feb 1 | Mar 1–15 (transplant) | – |
| Green onion / scallion | – | Mar 1–29 (sow outdoors) | Aug 16–30 (sowing) |
| Leek | Jan 18–Feb 1 | Mar 15–29 (transplant) | – |
| Garlic | – | – | Sep 13–Oct 11 (sowing) |
| Shallot | – | Mar 1–15 (transplant) | Sep 13–Oct 11 (sowing) |
| Potato | – | Mar 15–29 (transplant) | Jul 5–19 (transplant) |
| Sweet potato | – | May 3–17 (transplant) | – |
| Sweet corn | – | Apr 19–May 3 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 19–May 3 (sow outdoors) | – |
| Bean, pole | – | Apr 19–May 3 (sow outdoors) | – |
| Lima bean | – | Apr 26–May 10 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 3–24 (sow outdoors) | – |
| Cucumber | Mar 15–22 | Apr 19–May 3 (transplant) Apr 19–May 3 (sow outdoors) | – |
| Summer squash / zucchini | Mar 15–22 | Apr 19–May 3 (transplant) Apr 19–May 3 (sow outdoors) | – |
| Winter squash | Mar 15–22 | Apr 19–May 3 (transplant) Apr 19–May 3 (sow outdoors) | – |
| Pumpkin | – | Apr 19–May 3 (sow outdoors) | – |
| Watermelon | Mar 15–22 | Apr 26–May 10 (transplant) Apr 26–May 10 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 15–22 | Apr 26–May 10 (transplant) Apr 26–May 10 (sow outdoors) | – |
| Okra | Mar 1–15 | Apr 26–May 10 (transplant) Apr 26–May 10 (sow outdoors) | – |
| Celery | Jan 18–Feb 1 | Apr 19–26 (transplant) | – |
| Basil | Mar 1–15 | Apr 19–May 3 (transplant) Apr 19–May 3 (sow outdoors) | – |
| Cilantro | – | Mar 29–Apr 26 (sow outdoors) | Aug 30–Sep 13 (sowing) |
| Parsley | Feb 1–15 | Mar 29–Apr 12 (transplant) Mar 22–Apr 12 (sow outdoors) | – |
| Dill | – | Apr 12–26 (sow outdoors) | Aug 30–Sep 13 (sowing) |
| Sunflower | – | Apr 12–26 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 15–29 (transplant) | – |
| Rhubarb (crowns) | – | Mar 15–29 (transplant) | – |
| Strawberry (plants) | – | Mar 15–29 (transplant) | Aug 16–Sep 13 (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.
Where these numbers come from
Station: Lawrenceville 2WSW, IL (NOAA GHCN-Daily ID USC00114957), elevation 451 ft, 7.1 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Olney 2S, IL | 12 mi | Apr 15 | Oct 23 |
| Lawrenceville Intl AP, IL | 14 mi | Apr 8 | Oct 26 |
| Newton 6 SSE, IL | 19 mi | Apr 13 | Oct 22 |
The average last-frost dates of these stations span 7 days, a rough guide to local variation. See data sources & methods.
Frost questions for 62466
When is the last frost in 62466?
The average (50% chance) last spring freeze of 32°F for ZIP 62466 is April 12. For a more cautious planting date, use April 30, when only 1 year in 10 still sees a later freeze.
When is the first frost in 62466?
The average first fall freeze is October 25. In 1 year in 10 it comes by October 12.
What hardiness zone is 62466?
ZIP 62466 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 62466 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
62417 Bridgeport 62421 Claremont 62419 Calhoun 62460 St. Francisville 62439 Lawrenceville 62450 Olney 62452 Parkersburg 62410 Allendale
Other ZIP codes in Lawrence County
62417 62439 62460 All Lawrence County frost dates · Illinois 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.