Fall in zone 6bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 63385 (Wentzville, MO)
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, Weldon Spring NWS, MO (12 miles away).
- Average last spring frostApr 1050% chance of a 32°F freeze after this date
- Average first fall frostOct 2650% chance of a 32°F freeze by this date
- Growing season (frost-free)199 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
61°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 Shaw Nature Reserve (22 mi), Elsberry PMC (25 mi), Mark Twain HS (61 mi).
4-inch depth
62°F 55°F or warmer
24-hour average · latest 60°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Shaw Nature Reserve (22 mi), Elsberry PMC (25 mi), Mark Twain HS (61 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 63385 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 62°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 May 26 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 26: 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 26 |
| 50% (the "average" last frost) | Apr 10 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 26 |
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 26 |
| 90% (late: most years have frozen by now) | Nov 8 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 22 | Oct 16 |
| 32°F (freeze) | Apr 10 | Oct 26 |
| 28°F (hard freeze) | Mar 31 | Nov 5 |
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 63385
Dates count from your average last spring frost (Apr 10) and first fall frost (Oct 26). 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 13–27 | Apr 17–May 1 (transplant) | – |
| Pepper (sweet and hot) | Jan 30–Feb 13 | Apr 24–May 8 (transplant) | – |
| Eggplant | Jan 30–Feb 13 | Apr 24–May 8 (transplant) | – |
| Tomatillo | Feb 13–27 | Apr 17–May 1 (transplant) | – |
| Lettuce | Feb 13–27 | Mar 20–Apr 10 (transplant) Mar 13–Apr 24 (sow outdoors) | Aug 31–Sep 21 (transplant) Aug 17–Sep 14 (sowing) |
| Spinach | – | Feb 27–Mar 20 (sow outdoors) | Aug 31–Sep 21 (sowing) |
| Kale | Feb 13–27 | Mar 13–27 (transplant) Mar 13–27 (sow outdoors) | Aug 3–31 (transplant) Jul 20–Aug 17 (sowing) |
| Collards | Feb 13–27 | Mar 13–Apr 10 (transplant) Mar 13–Apr 10 (sow outdoors) | Aug 3–31 (transplant) Jul 20–Aug 17 (sowing) |
| Broccoli | Jan 30–Feb 13 | Mar 13–27 (transplant) | Jul 20–Aug 17 (transplant) |
| Cabbage | Jan 30–Feb 13 | Mar 13–27 (transplant) | Jul 20–Aug 17 (transplant) |
| Cauliflower | Jan 30–Feb 13 | Mar 27–Apr 10 (transplant) | Jul 20–Aug 17 (transplant) |
| Brussels sprouts | Jan 16–30 | Mar 13–27 (transplant) | Jul 6–27 (transplant) |
| Kohlrabi | Feb 13–27 | Mar 13–27 (transplant) Mar 13–27 (sow outdoors) | Aug 17–31 (sowing) |
| Bok choy / Asian greens | – | Mar 13–27 (sow outdoors) | Aug 31–Sep 14 (sowing) |
| Arugula | – | Mar 13–Apr 10 (sow outdoors) | Aug 31–Sep 28 (sowing) |
| Mustard greens | – | Mar 13–Apr 3 (sow outdoors) | Aug 31–Sep 14 (sowing) |
| Swiss chard | Feb 27–Mar 13 | Mar 27–Apr 17 (transplant) Mar 27–Apr 24 (sow outdoors) | Aug 17–31 (sowing) |
| Beet | – | Mar 13–Apr 10 (sow outdoors) | Aug 17–31 (sowing) |
| Carrot | – | Mar 20–Apr 17 (sow outdoors) | Aug 3–17 (sowing) |
| Radish | – | Mar 6–Apr 17 (sow outdoors) | Sep 14–28 (sowing) |
| Turnip | – | Mar 13–Apr 3 (sow outdoors) | Aug 17–31 (sowing) |
| Parsnip | – | Mar 20–Apr 10 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 13–Mar 13 (sow outdoors) | Aug 3–17 (sowing) |
| Onion (bulbing) | Jan 16–30 | Feb 27–Mar 13 (transplant) | – |
| Green onion / scallion | – | Feb 27–Mar 27 (sow outdoors) | Aug 17–31 (sowing) |
| Leek | Jan 16–30 | Mar 13–27 (transplant) | – |
| Garlic | – | – | Sep 14–Oct 12 (sowing) |
| Shallot | – | Feb 27–Mar 13 (transplant) | Sep 14–Oct 12 (sowing) |
| Potato | – | Mar 13–27 (transplant) | Jul 6–20 (transplant) |
| Sweet potato | – | May 1–15 (transplant) | – |
| Sweet corn | – | Apr 17–May 1 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 17–May 1 (sow outdoors) | – |
| Bean, pole | – | Apr 17–May 1 (sow outdoors) | – |
| Lima bean | – | Apr 24–May 8 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 1–22 (sow outdoors) | – |
| Cucumber | Mar 13–20 | Apr 17–May 1 (transplant) Apr 17–May 1 (sow outdoors) | – |
| Summer squash / zucchini | Mar 13–20 | Apr 17–May 1 (transplant) Apr 17–May 1 (sow outdoors) | – |
| Winter squash | Mar 13–20 | Apr 17–May 1 (transplant) Apr 17–May 1 (sow outdoors) | – |
| Pumpkin | – | Apr 17–May 1 (sow outdoors) | – |
| Watermelon | Mar 13–20 | Apr 24–May 8 (transplant) Apr 24–May 8 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 13–20 | Apr 24–May 8 (transplant) Apr 24–May 8 (sow outdoors) | – |
| Okra | Feb 27–Mar 13 | Apr 24–May 8 (transplant) Apr 24–May 8 (sow outdoors) | – |
| Celery | Jan 16–30 | Apr 17–24 (transplant) | – |
| Basil | Feb 27–Mar 13 | Apr 17–May 1 (transplant) Apr 17–May 1 (sow outdoors) | – |
| Cilantro | – | Mar 27–Apr 24 (sow outdoors) | Aug 31–Sep 14 (sowing) |
| Parsley | Jan 30–Feb 13 | Mar 27–Apr 10 (transplant) Mar 20–Apr 10 (sow outdoors) | – |
| Dill | – | Apr 10–24 (sow outdoors) | Aug 31–Sep 14 (sowing) |
| Sunflower | – | Apr 10–24 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 13–27 (transplant) | – |
| Rhubarb (crowns) | – | Mar 13–27 (transplant) | – |
| Strawberry (plants) | – | Mar 13–27 (transplant) | Aug 17–Sep 14 (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
Missouri has a university or garden plant program: Plants of Merit. Plant frost-tender annuals after April 10 here (the average last frost). Not affiliated with the program.
Where these numbers come from
Station: Weldon Spring NWS, MO (NOAA GHCN-Daily ID USC00238805), elevation 610 ft, 11.6 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| St Louis Sprt Of S L AP, MO | 15 mi | Apr 12 | Oct 23 |
| St Peters 2 SE, MO | 15 mi | Apr 9 | Oct 26 |
| Warrenton 1 N, MO | 15 mi | Apr 14 | Oct 23 |
The average last-frost dates of these stations span 5 days, a rough guide to local variation. See data sources & methods.
Frost questions for 63385
When is the last frost in 63385?
The average (50% chance) last spring freeze of 32°F for ZIP 63385 is April 10. For a more cautious planting date, use April 26, when only 1 year in 10 still sees a later freeze.
When is the first frost in 63385?
The average first fall freeze is October 26. In 1 year in 10 it comes by October 12.
What hardiness zone is 63385?
ZIP 63385 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 63385 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
63367 Lake St. Louis 63348 Foristell 63365 New Melle 63368 O'Fallon 63366 O'Fallon 63341 Defiance 63362 Moscow Mills 63390 Innsbrook
Other ZIP codes in St. Charles County
63301 63303 63304 63332 63341 63348 63365 63366 63367 63368 63373 63376 63386 All St. Charles County frost dates · Missouri frost dates
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