Fall in zone 6bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 62830 (Dix, 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, Iuka 12 SW, IL (3 miles away).
- Average last spring frostApr 950% chance of a 32°F freeze after this date
- Average first fall frostOct 2450% chance of a 32°F freeze by this date
- Growing season (frost-free)196 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 62830 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 24: 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 27 |
| 50% (the "average" last frost) | Apr 9 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 25 |
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 10 |
| 50% (the "average" first frost) | Oct 24 |
| 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 23 | Oct 14 |
| 32°F (freeze) | Apr 9 | Oct 24 |
| 28°F (hard freeze) | Mar 30 | Nov 2 |
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 62830
Dates count from your average last spring frost (Apr 9) and first fall frost (Oct 24). 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 12–26 | Apr 16–30 (transplant) | – |
| Pepper (sweet and hot) | Jan 29–Feb 12 | Apr 23–May 7 (transplant) | – |
| Eggplant | Jan 29–Feb 12 | Apr 23–May 7 (transplant) | – |
| Tomatillo | Feb 12–26 | Apr 16–30 (transplant) | – |
| Lettuce | Feb 12–26 | Mar 19–Apr 9 (transplant) Mar 12–Apr 23 (sow outdoors) | Aug 29–Sep 19 (transplant) Aug 15–Sep 12 (sowing) |
| Spinach | – | Feb 26–Mar 19 (sow outdoors) | Aug 29–Sep 19 (sowing) |
| Kale | Feb 12–26 | Mar 12–26 (transplant) Mar 12–26 (sow outdoors) | Aug 1–29 (transplant) Jul 18–Aug 15 (sowing) |
| Collards | Feb 12–26 | Mar 12–Apr 9 (transplant) Mar 12–Apr 9 (sow outdoors) | Aug 1–29 (transplant) Jul 18–Aug 15 (sowing) |
| Broccoli | Jan 29–Feb 12 | Mar 12–26 (transplant) | Jul 18–Aug 15 (transplant) |
| Cabbage | Jan 29–Feb 12 | Mar 12–26 (transplant) | Jul 18–Aug 15 (transplant) |
| Cauliflower | Jan 29–Feb 12 | Mar 26–Apr 9 (transplant) | Jul 18–Aug 15 (transplant) |
| Brussels sprouts | Jan 15–29 | Mar 12–26 (transplant) | Jul 4–25 (transplant) |
| Kohlrabi | Feb 12–26 | Mar 12–26 (transplant) Mar 12–26 (sow outdoors) | Aug 15–29 (sowing) |
| Bok choy / Asian greens | – | Mar 12–26 (sow outdoors) | Aug 29–Sep 12 (sowing) |
| Arugula | – | Mar 12–Apr 9 (sow outdoors) | Aug 29–Sep 26 (sowing) |
| Mustard greens | – | Mar 12–Apr 2 (sow outdoors) | Aug 29–Sep 12 (sowing) |
| Swiss chard | Feb 26–Mar 12 | Mar 26–Apr 16 (transplant) Mar 26–Apr 23 (sow outdoors) | Aug 15–29 (sowing) |
| Beet | – | Mar 12–Apr 9 (sow outdoors) | Aug 15–29 (sowing) |
| Carrot | – | Mar 19–Apr 16 (sow outdoors) | Aug 1–15 (sowing) |
| Radish | – | Mar 5–Apr 16 (sow outdoors) | Sep 12–26 (sowing) |
| Turnip | – | Mar 12–Apr 2 (sow outdoors) | Aug 15–29 (sowing) |
| Parsnip | – | Mar 19–Apr 9 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 12–Mar 12 (sow outdoors) | Aug 1–15 (sowing) |
| Onion (bulbing) | Jan 15–29 | Feb 26–Mar 12 (transplant) | – |
| Green onion / scallion | – | Feb 26–Mar 26 (sow outdoors) | Aug 15–29 (sowing) |
| Leek | Jan 15–29 | Mar 12–26 (transplant) | – |
| Garlic | – | – | Sep 12–Oct 10 (sowing) |
| Shallot | – | Feb 26–Mar 12 (transplant) | Sep 12–Oct 10 (sowing) |
| Potato | – | Mar 12–26 (transplant) | Jul 4–18 (transplant) |
| Sweet potato | – | Apr 30–May 14 (transplant) | – |
| Sweet corn | – | Apr 16–30 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 16–30 (sow outdoors) | – |
| Bean, pole | – | Apr 16–30 (sow outdoors) | – |
| Lima bean | – | Apr 23–May 7 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 30–May 21 (sow outdoors) | – |
| Cucumber | Mar 12–19 | Apr 16–30 (transplant) Apr 16–30 (sow outdoors) | – |
| Summer squash / zucchini | Mar 12–19 | Apr 16–30 (transplant) Apr 16–30 (sow outdoors) | – |
| Winter squash | Mar 12–19 | Apr 16–30 (transplant) Apr 16–30 (sow outdoors) | – |
| Pumpkin | – | Apr 16–30 (sow outdoors) | – |
| Watermelon | Mar 12–19 | Apr 23–May 7 (transplant) Apr 23–May 7 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 12–19 | Apr 23–May 7 (transplant) Apr 23–May 7 (sow outdoors) | – |
| Okra | Feb 26–Mar 12 | Apr 23–May 7 (transplant) Apr 23–May 7 (sow outdoors) | – |
| Celery | Jan 15–29 | Apr 16–23 (transplant) | – |
| Basil | Feb 26–Mar 12 | Apr 16–30 (transplant) Apr 16–30 (sow outdoors) | – |
| Cilantro | – | Mar 26–Apr 23 (sow outdoors) | Aug 29–Sep 12 (sowing) |
| Parsley | Jan 29–Feb 12 | Mar 26–Apr 9 (transplant) Mar 19–Apr 9 (sow outdoors) | – |
| Dill | – | Apr 9–23 (sow outdoors) | Aug 29–Sep 12 (sowing) |
| Sunflower | – | Apr 9–23 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 12–26 (transplant) | – |
| Rhubarb (crowns) | – | Mar 12–26 (transplant) | – |
| Strawberry (plants) | – | Mar 12–26 (transplant) | Aug 15–Sep 12 (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: Iuka 12 SW, IL (NOAA GHCN-Daily ID USC00114400), elevation 590 ft, 3.5 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Mt Vernon 3 NE, IL | 9 mi | Apr 11 | Oct 22 |
| Salem, IL | 14 mi | Apr 9 | Oct 26 |
| Nashville 1 E, IL | 22 mi | Apr 7 | Oct 26 |
The average last-frost dates of these stations span 4 days, a rough guide to local variation. See data sources & methods.
Frost questions for 62830
When is the last frost in 62830?
The average (50% chance) last spring freeze of 32°F for ZIP 62830 is April 9. For a more cautious planting date, use April 25, when only 1 year in 10 still sees a later freeze.
When is the first frost in 62830?
The average first fall freeze is October 24. In 1 year in 10 it comes by October 10.
What hardiness zone is 62830?
ZIP 62830 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 62830 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
62893 Walnut Hill 62853 Kell 62889 62898 Woodlawn 62864 Mount Vernon 62801 Centralia 62848 Irvington 62877 Richview
Other ZIP codes in Jefferson County
62810 62814 62816 62846 62864 62872 62883 62889 62893 62894 62898 All Jefferson County frost dates · Illinois 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.