Fall in zone 6bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 83543 (Nezperce, ID)
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, Nezperce, ID (3 miles away).
- Average last spring frostMay 2450% chance of a 32°F freeze after this date
- Average first fall frostSep 2050% chance of a 32°F freeze by this date
- Growing season (frost-free)116 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
54°F 50–55°F
24-hour average · latest 49°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Cook Farm Field D (54 mi).
4-inch depth
55°F 50–55°F
24-hour average · latest 53°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Cook Farm Field D (54 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 83543 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 55°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent window is mostly past. Next: spring, when soil reaches 50°F (typically 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 6 |
| 50% (the "average" last frost) | May 24 |
| 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 1 |
| 50% (the "average" first frost) | Sep 20 |
| 90% (late: most years have frozen by now) | Oct 5 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | n/a | n/a |
| 32°F (freeze) | May 24 | Sep 20 |
| 28°F (hard freeze) | May 5 | Oct 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 83543
Dates count from your average last spring frost (May 24) and first fall frost (Sep 20). 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 | Mar 29–Apr 12 | May 31–Jun 14 (transplant) | – |
| Pepper (sweet and hot) | Mar 15–29 | Jun 7–21 (transplant) | – |
| Eggplant | Mar 15–29 | Jun 7–21 (transplant) | – |
| Tomatillo | Mar 29–Apr 12 | May 31–Jun 14 (transplant) | – |
| Lettuce | Mar 29–Apr 12 | May 3–24 (transplant) Apr 26–Jun 7 (sow outdoors) | Jul 26–Aug 16 (transplant) Jul 12–Aug 9 (sowing) |
| Spinach | – | Apr 12–May 3 (sow outdoors) | Jul 26–Aug 16 (sowing) |
| Kale | Mar 29–Apr 12 | Apr 26–May 10 (transplant) Apr 26–May 10 (sow outdoors) | Jun 28–Jul 26 (transplant) Jun 14–Jul 12 (sowing) |
| Collards | Mar 29–Apr 12 | Apr 26–May 24 (transplant) Apr 26–May 24 (sow outdoors) | Jun 28–Jul 26 (transplant) Jun 14–Jul 12 (sowing) |
| Broccoli | Mar 15–29 | Apr 26–May 10 (transplant) | Jun 14–Jul 12 (transplant) |
| Cabbage | Mar 15–29 | Apr 26–May 10 (transplant) | Jun 14–Jul 12 (transplant) |
| Cauliflower | Mar 15–29 | May 10–24 (transplant) | Jun 14–Jul 12 (transplant) |
| Brussels sprouts | Mar 1–15 | Apr 26–May 10 (transplant) | May 31–Jun 21 (transplant) |
| Kohlrabi | Mar 29–Apr 12 | Apr 26–May 10 (transplant) Apr 26–May 10 (sow outdoors) | Jul 12–26 (sowing) |
| Bok choy / Asian greens | – | Apr 26–May 10 (sow outdoors) | Jul 26–Aug 9 (sowing) |
| Arugula | – | Apr 26–May 24 (sow outdoors) | Jul 26–Aug 23 (sowing) |
| Mustard greens | – | Apr 26–May 17 (sow outdoors) | Jul 26–Aug 9 (sowing) |
| Swiss chard | Apr 12–26 | May 10–31 (transplant) May 10–Jun 7 (sow outdoors) | Jul 12–26 (sowing) |
| Beet | – | Apr 26–May 24 (sow outdoors) | Jul 12–26 (sowing) |
| Carrot | – | May 3–31 (sow outdoors) | Jun 28–Jul 12 (sowing) |
| Radish | – | Apr 19–May 31 (sow outdoors) | Aug 9–23 (sowing) |
| Turnip | – | Apr 26–May 17 (sow outdoors) | Jul 12–26 (sowing) |
| Parsnip | – | May 3–24 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Mar 29–Apr 26 (sow outdoors) | Jun 28–Jul 12 (sowing) |
| Onion (bulbing) | Mar 1–15 | Apr 12–26 (transplant) | – |
| Green onion / scallion | – | Apr 12–May 10 (sow outdoors) | Jul 12–26 (sowing) |
| Leek | Mar 1–15 | Apr 26–May 10 (transplant) | – |
| Garlic | – | – | Aug 9–Sep 6 (sowing) |
| Shallot | – | Apr 12–26 (transplant) | Aug 9–Sep 6 (sowing) |
| Potato | – | Apr 26–May 10 (transplant) | May 31–Jun 14 (transplant) |
| Sweet potato | – | Jun 14–28 (transplant) | – |
| Sweet corn | – | May 31–Jun 14 (sow outdoors) | – |
| Bean, bush (snap) | – | May 31–Jun 14 (sow outdoors) | – |
| Bean, pole | – | May 31–Jun 14 (sow outdoors) | – |
| Lima bean | – | Jun 7–21 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 14–Jul 5 (sow outdoors) | – |
| Cucumber | Apr 26–May 3 | May 31–Jun 14 (transplant) May 31–Jun 14 (sow outdoors) | – |
| Summer squash / zucchini | Apr 26–May 3 | May 31–Jun 14 (transplant) May 31–Jun 14 (sow outdoors) | – |
| Winter squash | Apr 26–May 3 | May 31–Jun 14 (transplant) May 31–Jun 14 (sow outdoors) | – |
| Pumpkin | – | May 31–Jun 14 (sow outdoors) | – |
| Watermelon | Apr 26–May 3 | Jun 7–21 (transplant) Jun 7–21 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 26–May 3 | Jun 7–21 (transplant) Jun 7–21 (sow outdoors) | – |
| Okra | Apr 12–26 | Jun 7–21 (transplant) Jun 7–21 (sow outdoors) | – |
| Celery | Mar 1–15 | May 31–Jun 7 (transplant) | – |
| Basil | Apr 12–26 | May 31–Jun 14 (transplant) May 31–Jun 14 (sow outdoors) | – |
| Cilantro | – | May 10–Jun 7 (sow outdoors) | Jul 26–Aug 9 (sowing) |
| Parsley | Mar 15–29 | May 10–24 (transplant) May 3–24 (sow outdoors) | – |
| Dill | – | May 24–Jun 7 (sow outdoors) | Jul 26–Aug 9 (sowing) |
| Sunflower | – | May 24–Jun 7 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 26–May 10 (transplant) | – |
| Rhubarb (crowns) | – | Apr 26–May 10 (transplant) | – |
| Strawberry (plants) | – | Apr 26–May 10 (transplant) | Jul 12–Aug 9 (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: Nezperce, ID (NOAA GHCN-Daily ID USC00106424), elevation 3,248 ft, 2.9 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Kamiah, ID | 10 mi | Apr 29 | Oct 5 |
| Dworshak Fish Hatchery, ID | 16 mi | Apr 20 | Oct 20 |
| Cottonwood 2 WSW, ID | 18 mi | May 6 | Oct 13 |
The average last-frost dates of these stations span 35 days, a rough guide to local variation. See data sources & methods.
Frost questions for 83543
When is the last frost in 83543?
The average (50% chance) last spring freeze of 32°F for ZIP 83543 is May 24. 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 83543?
The average first fall freeze is September 20. In 1 year in 10 it comes by September 1.
What hardiness zone is 83543?
ZIP 83543 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 83543 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
83533 83536 Kamiah 83523 Craigmont 83526 Ferdinand 83548 Reubens 83545 Peck 83544 Orofino 83553 Weippe
Other ZIP codes in Lewis County
83523 All Lewis County frost dates · Idaho frost dates
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