Frost dates for ZIP 82443 (Lucerne, WY)
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, Thermopolis 21WNW, WY (11 miles away).
- Average last spring frostMay 2950% chance of a 32°F freeze after this date
- Average first fall frostSep 1750% chance of a 32°F freeze by this date
- Growing season (frost-free)110 daysmedian, 32°F threshold
- USDA hardiness zone5a-20 to -15°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
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 82443 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 mid-May.
Fertilizer window
Lawn region: Mountain West and High Plains. 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.
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) | May 14 |
| 50% (the "average" last frost) | May 29 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 19 |
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 3 |
| 50% (the "average" first frost) | Sep 17 |
| 90% (late: most years have frozen by now) | Oct 1 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Jun 17 | Sep 6 |
| 32°F (freeze) | May 29 | Sep 17 |
| 28°F (hard freeze) | May 14 | Sep 29 |
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 82443
Dates count from your average last spring frost (May 29) and first fall frost (Sep 17). 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 | Apr 3–17 | Jun 5–19 (transplant) | – |
| Pepper (sweet and hot) | Mar 20–Apr 3 | Jun 12–26 (transplant) | – |
| Eggplant | Mar 20–Apr 3 | Jun 12–26 (transplant) | – |
| Tomatillo | Apr 3–17 | Jun 5–19 (transplant) | – |
| Lettuce | Apr 3–17 | May 8–29 (transplant) May 1–Jun 12 (sow outdoors) | Jul 23–Aug 13 (transplant) Jul 9–Aug 6 (sowing) |
| Spinach | – | Apr 17–May 8 (sow outdoors) | Jul 23–Aug 13 (sowing) |
| Kale | Apr 3–17 | May 1–15 (transplant) May 1–15 (sow outdoors) | Jun 25–Jul 23 (transplant) Jun 11–Jul 9 (sowing) |
| Collards | Apr 3–17 | May 1–29 (transplant) May 1–29 (sow outdoors) | Jun 25–Jul 23 (transplant) Jun 11–Jul 9 (sowing) |
| Broccoli | Mar 20–Apr 3 | May 1–15 (transplant) | Jun 11–Jul 9 (transplant) |
| Cabbage | Mar 20–Apr 3 | May 1–15 (transplant) | Jun 11–Jul 9 (transplant) |
| Cauliflower | Mar 20–Apr 3 | May 15–29 (transplant) | Jun 11–Jul 9 (transplant) |
| Brussels sprouts | Mar 6–20 | May 1–15 (transplant) | May 28–Jun 18 (transplant) |
| Kohlrabi | Apr 3–17 | May 1–15 (transplant) May 1–15 (sow outdoors) | Jul 9–23 (sowing) |
| Bok choy / Asian greens | – | May 1–15 (sow outdoors) | Jul 23–Aug 6 (sowing) |
| Arugula | – | May 1–29 (sow outdoors) | Jul 23–Aug 20 (sowing) |
| Mustard greens | – | May 1–22 (sow outdoors) | Jul 23–Aug 6 (sowing) |
| Swiss chard | Apr 17–May 1 | May 15–Jun 5 (transplant) May 15–Jun 12 (sow outdoors) | Jul 9–23 (sowing) |
| Beet | – | May 1–29 (sow outdoors) | Jul 9–23 (sowing) |
| Carrot | – | May 8–Jun 5 (sow outdoors) | Jun 25–Jul 9 (sowing) |
| Radish | – | Apr 24–Jun 5 (sow outdoors) | Aug 6–20 (sowing) |
| Turnip | – | May 1–22 (sow outdoors) | Jul 9–23 (sowing) |
| Parsnip | – | May 8–29 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 3–May 1 (sow outdoors) | Jun 25–Jul 9 (sowing) |
| Onion (bulbing) | Mar 6–20 | Apr 17–May 1 (transplant) | – |
| Green onion / scallion | – | Apr 17–May 15 (sow outdoors) | Jul 9–23 (sowing) |
| Leek | Mar 6–20 | May 1–15 (transplant) | – |
| Garlic | – | – | Aug 6–Sep 3 (sowing) |
| Shallot | – | Apr 17–May 1 (transplant) | Aug 6–Sep 3 (sowing) |
| Potato | – | May 1–15 (transplant) | May 28–Jun 11 (transplant) |
| Sweet potato | – | Jun 19–Jul 3 (transplant) | – |
| Sweet corn | – | Jun 5–19 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 5–19 (sow outdoors) | – |
| Bean, pole | – | Jun 5–19 (sow outdoors) | – |
| Lima bean | – | Jun 12–26 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 19–Jul 10 (sow outdoors) | – |
| Cucumber | May 1–8 | Jun 5–19 (transplant) Jun 5–19 (sow outdoors) | – |
| Summer squash / zucchini | May 1–8 | Jun 5–19 (transplant) Jun 5–19 (sow outdoors) | – |
| Winter squash | May 1–8 | Jun 5–19 (transplant) Jun 5–19 (sow outdoors) | – |
| Pumpkin | – | Jun 5–19 (sow outdoors) | – |
| Watermelon | May 1–8 | Jun 12–26 (transplant) Jun 12–26 (sow outdoors) | – |
| Cantaloupe / muskmelon | May 1–8 | Jun 12–26 (transplant) Jun 12–26 (sow outdoors) | – |
| Okra | Apr 17–May 1 | Jun 12–26 (transplant) Jun 12–26 (sow outdoors) | – |
| Celery | Mar 6–20 | Jun 5–12 (transplant) | – |
| Basil | Apr 17–May 1 | Jun 5–19 (transplant) Jun 5–19 (sow outdoors) | – |
| Cilantro | – | May 15–Jun 12 (sow outdoors) | Jul 23–Aug 6 (sowing) |
| Parsley | Mar 20–Apr 3 | May 15–29 (transplant) May 8–29 (sow outdoors) | – |
| Dill | – | May 29–Jun 12 (sow outdoors) | Jul 23–Aug 6 (sowing) |
| Sunflower | – | May 29–Jun 12 (sow outdoors) | – |
| Asparagus (crowns) | – | May 1–15 (transplant) | – |
| Rhubarb (crowns) | – | May 1–15 (transplant) | – |
| Strawberry (plants) | – | May 1–15 (transplant) | Jul 9–Aug 6 (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: Thermopolis 21WNW, WY (NOAA GHCN-Daily ID USC00488888), elevation 5,510 ft, 11.1 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Thermopolis, WY | 14 mi | May 5 | Oct 5 |
| Thermopolis 9NE, WY | 17 mi | May 24 | Sep 16 |
| Boysen Dam, WY | 27 mi | May 5 | Oct 7 |
The average last-frost dates of these stations span 24 days, a rough guide to local variation. See data sources & methods.
Frost questions for 82443
When is the last frost in 82443?
The average (50% chance) last spring freeze of 32°F for ZIP 82443 is May 29. For a more cautious planting date, use June 19, when only 1 year in 10 still sees a later freeze.
When is the first frost in 82443?
The average first fall freeze is September 17. In 1 year in 10 it comes by September 3.
What hardiness zone is 82443?
ZIP 82443 is in USDA zone 5a (-20 to -15°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 82443 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
82430 Kirby 82401 Worland 82523 Pavillion 82649 Shoshoni 82516 Johnstown 82433 Meeteetse 82434 82432 Manderson
Other ZIP codes in Hot Springs County
82430 All Hot Springs County frost dates · Wyoming frost dates
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