Fall in zone 9aPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 89039 (Cal-Nev-Ari, NV)
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, Searchlight, NV (14 miles away).
- Average last spring frostMar 750% chance of a 32°F freeze after this date
- Average first fall frostNov 2950% chance of a 32°F freeze by this date
- Growing season (frost-free)266 daysmedian, 32°F threshold
- USDA hardiness zone9a20 to 25°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
66°F 55°F or warmer
24-hour average · latest 64°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Essex (44 mi), Shadow Mtns (49 mi).
4-inch depth
67°F 55°F or warmer
24-hour average · latest 66°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Essex (44 mi), Shadow Mtns (49 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 89039 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 67°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: Arid Southwest (low desert). Timing only; always follow the product label.
- Bermudagrass (warm-season): Spring: Several weeks after the lawn is fully green (April–May) (about Apr 22 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).
- Perennial ryegrass (cool-season): Early fall: September; Late fall: October–November; Overseeded Bermuda: Light feeding once the winter rye is established, if needed. Avoid: Summer feeding.
Plant now
- Lettuce: fall sowing Sep 20–Oct 18
- Lettuce: fall transplant Oct 4–25
- Spinach: fall sowing Oct 4–25
- Bok choy / Asian greens: fall sowing Oct 4–18
- Arugula: fall sowing Oct 4–Nov 1
- Mustard greens: fall sowing Oct 4–18
- Radish: fall sowing Oct 18–Nov 1
- Garlic: fall sowing Oct 18–Nov 15
- Shallot: fall sowing Oct 18–Nov 15
- Cilantro: fall sowing Oct 4–18
- Dill: fall sowing Oct 4–18
- Strawberry (plants): fall transplant Sep 20–Oct 18
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 29: 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) | Feb 8 |
| 50% (the "average" last frost) | Mar 7 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 10 |
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) | Nov 7 |
| 50% (the "average" first frost) | Nov 29 |
| 90% (late: most years have frozen by now) | Dec 17 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 1 | Nov 17 |
| 32°F (freeze) | Mar 7 | Nov 29 |
| 28°F (hard freeze) | Feb 11 | Dec 11 |
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 89039
Dates count from your average last spring frost (Mar 7) and first fall frost (Nov 29). 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 | Jan 10–24 | Mar 14–28 (transplant) | Aug 2–30 (transplant) |
| Pepper (sweet and hot) | Dec 27–Jan 10 | Mar 21–Apr 4 (transplant) | Aug 9–30 (transplant) |
| Eggplant | Dec 27–Jan 10 | Mar 21–Apr 4 (transplant) | Aug 9–30 (transplant) |
| Tomatillo | Jan 10–24 | Mar 14–28 (transplant) | – |
| Lettuce | Jan 10–24 | Feb 14–Mar 7 (transplant) Feb 7–Mar 21 (sow outdoors) | Oct 4–25 (transplant) Sep 20–Oct 18 (sowing) |
| Spinach | – | Jan 24–Feb 14 (sow outdoors) | Oct 4–25 (sowing) |
| Kale | Jan 10–24 | Feb 7–21 (transplant) Feb 7–21 (sow outdoors) | Sep 6–Oct 4 (transplant) Aug 23–Sep 20 (sowing) |
| Collards | Jan 10–24 | Feb 7–Mar 7 (transplant) Feb 7–Mar 7 (sow outdoors) | Sep 6–Oct 4 (transplant) Aug 23–Sep 20 (sowing) |
| Broccoli | Dec 27–Jan 10 | Feb 7–21 (transplant) | Aug 23–Sep 20 (transplant) |
| Cabbage | Dec 27–Jan 10 | Feb 7–21 (transplant) | Aug 23–Sep 20 (transplant) |
| Cauliflower | Dec 27–Jan 10 | Feb 21–Mar 7 (transplant) | Aug 23–Sep 20 (transplant) |
| Brussels sprouts | Dec 13–27 | Feb 7–21 (transplant) | Aug 9–30 (transplant) |
| Kohlrabi | Jan 10–24 | Feb 7–21 (transplant) Feb 7–21 (sow outdoors) | Sep 20–Oct 4 (sowing) |
| Bok choy / Asian greens | – | Feb 7–21 (sow outdoors) | Oct 4–18 (sowing) |
| Arugula | – | Feb 7–Mar 7 (sow outdoors) | Oct 4–Nov 1 (sowing) |
| Mustard greens | – | Feb 7–28 (sow outdoors) | Oct 4–18 (sowing) |
| Swiss chard | Jan 24–Feb 7 | Feb 21–Mar 14 (transplant) Feb 21–Mar 21 (sow outdoors) | Sep 20–Oct 4 (sowing) |
| Beet | – | Feb 7–Mar 7 (sow outdoors) | Sep 20–Oct 4 (sowing) |
| Carrot | – | Feb 14–Mar 14 (sow outdoors) | Sep 6–20 (sowing) |
| Radish | – | Jan 31–Mar 14 (sow outdoors) | Oct 18–Nov 1 (sowing) |
| Turnip | – | Feb 7–28 (sow outdoors) | Sep 20–Oct 4 (sowing) |
| Parsnip | – | Feb 14–Mar 7 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Jan 10–Feb 7 (sow outdoors) | Sep 6–20 (sowing) |
| Onion (bulbing) | Dec 13–27 | Jan 24–Feb 7 (transplant) | – |
| Green onion / scallion | – | Jan 24–Feb 21 (sow outdoors) | Sep 20–Oct 4 (sowing) |
| Leek | Dec 13–27 | Feb 7–21 (transplant) | – |
| Garlic | – | – | Oct 18–Nov 15 (sowing) |
| Shallot | – | Jan 24–Feb 7 (transplant) | Oct 18–Nov 15 (sowing) |
| Potato | – | Feb 7–21 (transplant) | Aug 9–23 (transplant) |
| Sweet potato | – | Mar 28–Apr 11 (transplant) | – |
| Sweet corn | – | Mar 14–28 (sow outdoors) | – |
| Bean, bush (snap) | – | Mar 14–28 (sow outdoors) | Sep 6–20 (sowing) |
| Bean, pole | – | Mar 14–28 (sow outdoors) | – |
| Lima bean | – | Mar 21–Apr 4 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Mar 28–Apr 18 (sow outdoors) | – |
| Cucumber | Feb 7–14 | Mar 14–28 (transplant) Mar 14–28 (sow outdoors) | Sep 6–20 (sowing) |
| Summer squash / zucchini | Feb 7–14 | Mar 14–28 (transplant) Mar 14–28 (sow outdoors) | Sep 6–20 (sowing) |
| Winter squash | Feb 7–14 | Mar 14–28 (transplant) Mar 14–28 (sow outdoors) | – |
| Pumpkin | – | Mar 14–28 (sow outdoors) | – |
| Watermelon | Feb 7–14 | Mar 21–Apr 4 (transplant) Mar 21–Apr 4 (sow outdoors) | – |
| Cantaloupe / muskmelon | Feb 7–14 | Mar 21–Apr 4 (transplant) Mar 21–Apr 4 (sow outdoors) | – |
| Okra | Jan 24–Feb 7 | Mar 21–Apr 4 (transplant) Mar 21–Apr 4 (sow outdoors) | – |
| Celery | Dec 13–27 | Mar 14–21 (transplant) | – |
| Basil | Jan 24–Feb 7 | Mar 14–28 (transplant) Mar 14–28 (sow outdoors) | – |
| Cilantro | – | Feb 21–Mar 21 (sow outdoors) | Oct 4–18 (sowing) |
| Parsley | Dec 27–Jan 10 | Feb 21–Mar 7 (transplant) Feb 14–Mar 7 (sow outdoors) | – |
| Dill | – | Mar 7–21 (sow outdoors) | Oct 4–18 (sowing) |
| Sunflower | – | Mar 7–21 (sow outdoors) | – |
| Asparagus (crowns) | – | Feb 7–21 (transplant) | – |
| Rhubarb (crowns) | – | Feb 7–21 (transplant) | – |
| Strawberry (plants) | – | Feb 7–21 (transplant) | Sep 20–Oct 18 (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: Searchlight, NV (NOAA GHCN-Daily ID USC00267369), elevation 3,540 ft, 14.1 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Laughlin, NV | 18 mi | Jan 5 | Dec 24 |
| Bullhead City, AZ | 19 mi | Jan 4 | Dec 23 |
| Needles AP, CA | 37 mi | Jan 6 | Jan 2 (next year) |
The average last-frost dates of these stations span 65 days, a rough guide to local variation. See data sources & methods.
Frost questions for 89039
When is the last frost in 89039?
The average (50% chance) last spring freeze of 32°F for ZIP 89039 is March 7. For a more cautious planting date, use April 10, when only 1 year in 10 still sees a later freeze.
When is the first frost in 89039?
The average first fall freeze is November 29. In 1 year in 10 it comes by November 7.
What hardiness zone is 89039?
ZIP 89039 is in USDA zone 9a (20 to 25°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 89039 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
89029 Laughlin 89046 Nelson 86442 Bullhead City 86429 Bullhead City 86426 Fort Mohave 86440 Mohave Valley 92364 86445 White Hills
Other ZIP codes in Clark County
89002 89004 89005 89007 89011 89012 89014 89015 89018 89019 89021 89025 89026 89027 89029 89030 89031 89032 89034 89040 89044 89046 89052 89054 All Clark County frost dates · Nevada 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.