Fall in zone 5bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 50052 (Clio, IA)
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, Allerton, IA (6 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)178 daysmedian, 32°F threshold
- USDA hardiness zone5b-15 to -10°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
57°F 55°F or warmer
24-hour average · latest 56°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Spickard (31 mi), Chillicothe 22 ENE (56 mi).
4-inch depth
60°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 Spickard (31 mi), Chillicothe 22 ENE (56 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 50052 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 60°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: 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 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 6 |
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 3 |
| 50% (the "average" first frost) | Oct 19 |
| 90% (late: most years have frozen by now) | Oct 29 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 2 | Oct 7 |
| 32°F (freeze) | Apr 21 | Oct 19 |
| 28°F (hard freeze) | Apr 11 | Oct 27 |
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 50052
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.
Where these numbers come from
Station: Allerton, IA (NOAA GHCN-Daily ID USC00130149), elevation 1,090 ft, 5.7 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Leon 6 ESE, IA | 12 mi | Apr 30 | Oct 8 |
| Princeton, MO | 18 mi | Apr 25 | Oct 15 |
| Lamoni Muni AP, IA | 24 mi | Apr 16 | Oct 21 |
The average last-frost dates of these stations span 14 days, a rough guide to local variation. See data sources & methods.
Frost questions for 50052
When is the last frost in 50052?
The average (50% chance) last spring freeze of 32°F for ZIP 50052 is April 21. For a more cautious planting date, use May 6, when only 1 year in 10 still sees a later freeze.
When is the first frost in 50052?
The average first fall freeze is October 19. In 1 year in 10 it comes by October 3.
What hardiness zone is 50052?
ZIP 50052 is in USDA zone 5b (-15 to -10°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 50052 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
50008 Allerton 50147 Lineville 64661 Mercer 50060 Corydon 64672 Powersville 50103 Garden Grove 50123 Humeston 52590 Seymour
Other ZIP codes in Wayne County
50008 50060 50123 50147 50165 52583 52590 All Wayne County frost dates · Iowa frost dates
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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.