Fall in zone 9bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 86433 (Oatman, AZ)
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, Yucca 1 NNE, AZ (13 miles away).
- Average last spring frostFeb 1850% chance of a 32°F freeze after this date
- Average first fall frostDec 250% chance of a 32°F freeze by this date
- Growing season (frost-free)288 daysmedian, 32°F threshold
- USDA hardiness zone9b25 to 30°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
67°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 (49 mi).
4-inch depth
68°F 55°F or warmer
24-hour average · latest 67°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Essex (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 86433 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 68°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 5 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 23–Oct 21
- Lettuce: fall transplant Oct 7–28
- Spinach: fall sowing Oct 7–28
- Bok choy / Asian greens: fall sowing Oct 7–21
- Arugula: fall sowing Oct 7–Nov 4
- Mustard greens: fall sowing Oct 7–21
- Cilantro: fall sowing Oct 7–21
- Dill: fall sowing Oct 7–21
- Strawberry (plants): fall transplant Sep 23–Oct 21
Coming up in the next 3 weeks
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Dec 2: 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) | Jan 24 |
| 50% (the "average" last frost) | Feb 18 |
| 10% (cautious: only 1 year in 10 freezes later) | Mar 16 |
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 16 |
| 50% (the "average" first frost) | Dec 2 |
| 90% (late: most years have frozen by now) | Dec 22 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Mar 11 | Nov 20 |
| 32°F (freeze) | Feb 18 | Dec 2 |
| 28°F (hard freeze) | Jan 19 | Dec 16 |
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 86433
Dates count from your average last spring frost (Feb 18) and first fall frost (Dec 2). 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 | Dec 24–Jan 7 | Feb 25–Mar 11 (transplant) | Aug 5–Sep 2 (transplant) |
| Pepper (sweet and hot) | Dec 10–24 | Mar 4–18 (transplant) | Aug 12–Sep 2 (transplant) |
| Eggplant | Dec 10–24 | Mar 4–18 (transplant) | Aug 12–Sep 2 (transplant) |
| Tomatillo | Dec 24–Jan 7 | Feb 25–Mar 11 (transplant) | – |
| Lettuce | Dec 24–Jan 7 | Jan 28–Feb 18 (transplant) Jan 21–Mar 4 (sow outdoors) | Oct 7–28 (transplant) Sep 23–Oct 21 (sowing) |
| Spinach | – | Jan 7–28 (sow outdoors) | Oct 7–28 (sowing) |
| Kale | Dec 24–Jan 7 | Jan 21–Feb 4 (transplant) Jan 21–Feb 4 (sow outdoors) | Sep 9–Oct 7 (transplant) Aug 26–Sep 23 (sowing) |
| Collards | Dec 24–Jan 7 | Jan 21–Feb 18 (transplant) Jan 21–Feb 18 (sow outdoors) | Sep 9–Oct 7 (transplant) Aug 26–Sep 23 (sowing) |
| Broccoli | Dec 10–24 | Jan 21–Feb 4 (transplant) | Aug 26–Sep 23 (transplant) |
| Cabbage | Dec 10–24 | Jan 21–Feb 4 (transplant) | Aug 26–Sep 23 (transplant) |
| Cauliflower | Dec 10–24 | Feb 4–18 (transplant) | Aug 26–Sep 23 (transplant) |
| Brussels sprouts | Nov 26–Dec 10 | Jan 21–Feb 4 (transplant) | Aug 12–Sep 2 (transplant) |
| Kohlrabi | Dec 24–Jan 7 | Jan 21–Feb 4 (transplant) Jan 21–Feb 4 (sow outdoors) | Sep 23–Oct 7 (sowing) |
| Bok choy / Asian greens | – | Jan 21–Feb 4 (sow outdoors) | Oct 7–21 (sowing) |
| Arugula | – | Jan 21–Feb 18 (sow outdoors) | Oct 7–Nov 4 (sowing) |
| Mustard greens | – | Jan 21–Feb 11 (sow outdoors) | Oct 7–21 (sowing) |
| Swiss chard | Jan 7–21 | Feb 4–25 (transplant) Feb 4–Mar 4 (sow outdoors) | Sep 23–Oct 7 (sowing) |
| Beet | – | Jan 21–Feb 18 (sow outdoors) | Sep 23–Oct 7 (sowing) |
| Carrot | – | Jan 28–Feb 25 (sow outdoors) | Sep 9–23 (sowing) |
| Radish | – | Jan 14–Feb 25 (sow outdoors) | Oct 21–Nov 4 (sowing) |
| Turnip | – | Jan 21–Feb 11 (sow outdoors) | Sep 23–Oct 7 (sowing) |
| Parsnip | – | Jan 28–Feb 18 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Dec 24–Jan 21 (sow outdoors) | Sep 9–23 (sowing) |
| Onion (bulbing) | Nov 26–Dec 10 | Jan 7–21 (transplant) | – |
| Green onion / scallion | – | Jan 7–Feb 4 (sow outdoors) | Sep 23–Oct 7 (sowing) |
| Leek | Nov 26–Dec 10 | Jan 21–Feb 4 (transplant) | – |
| Garlic | – | – | Oct 21–Nov 18 (sowing) |
| Shallot | – | Jan 7–21 (transplant) | Oct 21–Nov 18 (sowing) |
| Potato | – | Jan 21–Feb 4 (transplant) | Aug 12–26 (transplant) |
| Sweet potato | – | Mar 11–25 (transplant) | – |
| Sweet corn | – | Feb 25–Mar 11 (sow outdoors) | – |
| Bean, bush (snap) | – | Feb 25–Mar 11 (sow outdoors) | Sep 9–23 (sowing) |
| Bean, pole | – | Feb 25–Mar 11 (sow outdoors) | – |
| Lima bean | – | Mar 4–18 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Mar 11–Apr 1 (sow outdoors) | – |
| Cucumber | Jan 21–28 | Feb 25–Mar 11 (transplant) Feb 25–Mar 11 (sow outdoors) | Sep 9–23 (sowing) |
| Summer squash / zucchini | Jan 21–28 | Feb 25–Mar 11 (transplant) Feb 25–Mar 11 (sow outdoors) | Sep 9–23 (sowing) |
| Winter squash | Jan 21–28 | Feb 25–Mar 11 (transplant) Feb 25–Mar 11 (sow outdoors) | – |
| Pumpkin | – | Feb 25–Mar 11 (sow outdoors) | – |
| Watermelon | Jan 21–28 | Mar 4–18 (transplant) Mar 4–18 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 21–28 | Mar 4–18 (transplant) Mar 4–18 (sow outdoors) | – |
| Okra | Jan 7–21 | Mar 4–18 (transplant) Mar 4–18 (sow outdoors) | – |
| Celery | Nov 26–Dec 10 | Feb 25–Mar 4 (transplant) | – |
| Basil | Jan 7–21 | Feb 25–Mar 11 (transplant) Feb 25–Mar 11 (sow outdoors) | – |
| Cilantro | – | Feb 4–Mar 4 (sow outdoors) | Oct 7–21 (sowing) |
| Parsley | Dec 10–24 | Feb 4–18 (transplant) Jan 28–Feb 18 (sow outdoors) | – |
| Dill | – | Feb 18–Mar 4 (sow outdoors) | Oct 7–21 (sowing) |
| Sunflower | – | Feb 18–Mar 4 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 21–Feb 4 (transplant) | – |
| Rhubarb (crowns) | – | Jan 21–Feb 4 (transplant) | – |
| Strawberry (plants) | – | Jan 21–Feb 4 (transplant) | Sep 23–Oct 21 (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: Yucca 1 NNE, AZ (NOAA GHCN-Daily ID USC00029645), elevation 1,950 ft, 13.2 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Needles AP, CA | 19 mi | Jan 6 | Jan 2 (next year) |
| Bullhead City, AZ | 19 mi | Jan 4 | Dec 23 |
| Laughlin, NV | 21 mi | Jan 5 | Dec 24 |
The average last-frost dates of these stations span 45 days, a rough guide to local variation. See data sources & methods.
Frost questions for 86433
When is the last frost in 86433?
The average (50% chance) last spring freeze of 32°F for ZIP 86433 is February 18. For a more cautious planting date, use March 16, when only 1 year in 10 still sees a later freeze.
When is the first frost in 86433?
The average first fall freeze is December 2. In 1 year in 10 it comes by November 16.
What hardiness zone is 86433?
ZIP 86433 is in USDA zone 9b (25 to 30°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 86433 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
86440 Mohave Valley 86426 Fort Mohave 86436 Golden Shores 86442 Bullhead City 86413 Golden Valley 92363 Needles 89029 Laughlin 86404 Lake Havasu City
Other ZIP codes in Mohave County
85360 86021 86401 86403 86404 86406 86409 86411 86413 86426 86429 86431 86432 86434 86436 86437 86438 86440 86441 86442 86443 86444 86445 All Mohave County frost dates · Arizona frost dates
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Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- Freeze alerts
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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.