Fall in zone 9aPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 86441 (Dolan Springs, 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, Willow Beach, AZ (29 miles away).
Freezes are uncommon here
NOAA's normals for this station show a 32°F night in about 63% of years (about 1 freezing night(s) a year on average). The dates below describe freeze timing for the station's record; in many years there may be no 32°F freeze at all.
Station is a bit far
The nearest station with freeze normals is over 40 km away, so dates here may be off by a week or more.
- Average last spring frostJan 750% chance of a 32°F freeze after this date
- Average first fall frostDec 2950% chance of a 32°F freeze by this date
- Growing season (frost-free)358 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
Freezes are uncommon here, so frost-based timing is rough. Local extension calendars for frost-free areas use months.
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 86441 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 late January to February; fall September to October.
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 Feb 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
- Kale: fall sowing Sep 22–Oct 20
- Kale: fall transplant Oct 6–Nov 3
- Collards: fall sowing Sep 22–Oct 20
- Collards: fall transplant Oct 6–Nov 3
- Broccoli: fall transplant Sep 22–Oct 20
- Cabbage: fall transplant Sep 22–Oct 20
- Cauliflower: fall transplant Sep 22–Oct 20
- Brussels sprouts: start seeds indoors Oct 15–29
- Carrot: fall sowing Oct 6–20
- Pea (garden, snap, snow): fall sowing Oct 6–20
- Onion (bulbing): start seeds indoors Oct 15–29
- Leek: start seeds indoors Oct 15–29
- Bean, bush (snap): fall sowing Oct 6–20
- Cucumber: fall sowing Oct 6–20
- Summer squash / zucchini: fall sowing Oct 6–20
- Celery: start seeds indoors Oct 15–29
Coming up in the next 3 weeks
- Pepper (sweet and hot): start seeds indoors Oct 29–Nov 12
- Eggplant: start seeds indoors Oct 29–Nov 12
- Lettuce: fall sowing Oct 20–Nov 17
- Lettuce: fall transplant Nov 3–24
- Spinach: fall sowing Nov 3–24
- Broccoli: start seeds indoors Oct 29–Nov 12
- Cabbage: start seeds indoors Oct 29–Nov 12
- Cauliflower: start seeds indoors Oct 29–Nov 12
- Kohlrabi: fall sowing Oct 20–Nov 3
- Bok choy / Asian greens: fall sowing Nov 3–17
- Arugula: fall sowing Nov 3–Dec 1
- Mustard greens: fall sowing Nov 3–17
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) | Dec 20 (prior Dec) |
| 50% (the "average" last frost) | Jan 7 |
| 10% (cautious: only 1 year in 10 freezes later) | Feb 1 |
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) | Dec 10 |
| 50% (the "average" first frost) | Dec 29 |
| 90% (late: most years have frozen by now) | Jan 18 (next year) |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Jan 29 | Dec 15 |
| 32°F (freeze) | Jan 7 | Dec 29 |
| 28°F (hard freeze) | Jan 2 | Jan 1 (next year) |
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 86441
Dates count from your average last spring frost (Jan 7) and first fall frost (Dec 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 | Nov 12–26 | Jan 14–28 (transplant) | Sep 1–29 (transplant) |
| Pepper (sweet and hot) | Oct 29–Nov 12 | Jan 21–Feb 4 (transplant) | Sep 8–29 (transplant) |
| Eggplant | Oct 29–Nov 12 | Jan 21–Feb 4 (transplant) | Sep 8–29 (transplant) |
| Tomatillo | Nov 12–26 | Jan 14–28 (transplant) | – |
| Lettuce | Nov 12–26 | Dec 17–Jan 7 (transplant) Dec 10–Jan 21 (sow outdoors) | Nov 3–24 (transplant) Oct 20–Nov 17 (sowing) |
| Spinach | – | Nov 26–Dec 17 (sow outdoors) | Nov 3–24 (sowing) |
| Kale | Nov 12–26 | Dec 10–24 (transplant) Dec 10–24 (sow outdoors) | Oct 6–Nov 3 (transplant) Sep 22–Oct 20 (sowing) |
| Collards | Nov 12–26 | Dec 10–Jan 7 (transplant) Dec 10–Jan 7 (sow outdoors) | Oct 6–Nov 3 (transplant) Sep 22–Oct 20 (sowing) |
| Broccoli | Oct 29–Nov 12 | Dec 10–24 (transplant) | Sep 22–Oct 20 (transplant) |
| Cabbage | Oct 29–Nov 12 | Dec 10–24 (transplant) | Sep 22–Oct 20 (transplant) |
| Cauliflower | Oct 29–Nov 12 | Dec 24–Jan 7 (transplant) | Sep 22–Oct 20 (transplant) |
| Brussels sprouts | Oct 15–29 | Dec 10–24 (transplant) | Sep 8–29 (transplant) |
| Kohlrabi | Nov 12–26 | Dec 10–24 (transplant) Dec 10–24 (sow outdoors) | Oct 20–Nov 3 (sowing) |
| Bok choy / Asian greens | – | Dec 10–24 (sow outdoors) | Nov 3–17 (sowing) |
| Arugula | – | Dec 10–Jan 7 (sow outdoors) | Nov 3–Dec 1 (sowing) |
| Mustard greens | – | Dec 10–31 (sow outdoors) | Nov 3–17 (sowing) |
| Swiss chard | Nov 26–Dec 10 | Dec 24–Jan 14 (transplant) Dec 24–Jan 21 (sow outdoors) | Oct 20–Nov 3 (sowing) |
| Beet | – | Dec 10–Jan 7 (sow outdoors) | Oct 20–Nov 3 (sowing) |
| Carrot | – | Dec 17–Jan 14 (sow outdoors) | Oct 6–20 (sowing) |
| Radish | – | Dec 3–Jan 14 (sow outdoors) | Nov 17–Dec 1 (sowing) |
| Turnip | – | Dec 10–31 (sow outdoors) | Oct 20–Nov 3 (sowing) |
| Parsnip | – | Dec 17–Jan 7 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Nov 12–Dec 10 (sow outdoors) | Oct 6–20 (sowing) |
| Onion (bulbing) | Oct 15–29 | Nov 26–Dec 10 (transplant) | – |
| Green onion / scallion | – | Nov 26–Dec 24 (sow outdoors) | Oct 20–Nov 3 (sowing) |
| Leek | Oct 15–29 | Dec 10–24 (transplant) | – |
| Garlic | – | – | Nov 17–Dec 15 (sowing) |
| Shallot | – | Nov 26–Dec 10 (transplant) | Nov 17–Dec 15 (sowing) |
| Potato | – | Dec 10–24 (transplant) | Sep 8–22 (transplant) |
| Sweet potato | – | Jan 28–Feb 11 (transplant) | – |
| Sweet corn | – | Jan 14–28 (sow outdoors) | – |
| Bean, bush (snap) | – | Jan 14–28 (sow outdoors) | Oct 6–20 (sowing) |
| Bean, pole | – | Jan 14–28 (sow outdoors) | – |
| Lima bean | – | Jan 21–Feb 4 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jan 28–Feb 18 (sow outdoors) | – |
| Cucumber | Dec 10–17 | Jan 14–28 (transplant) Jan 14–28 (sow outdoors) | Oct 6–20 (sowing) |
| Summer squash / zucchini | Dec 10–17 | Jan 14–28 (transplant) Jan 14–28 (sow outdoors) | Oct 6–20 (sowing) |
| Winter squash | Dec 10–17 | Jan 14–28 (transplant) Jan 14–28 (sow outdoors) | – |
| Pumpkin | – | Jan 14–28 (sow outdoors) | – |
| Watermelon | Dec 10–17 | Jan 21–Feb 4 (transplant) Jan 21–Feb 4 (sow outdoors) | – |
| Cantaloupe / muskmelon | Dec 10–17 | Jan 21–Feb 4 (transplant) Jan 21–Feb 4 (sow outdoors) | – |
| Okra | Nov 26–Dec 10 | Jan 21–Feb 4 (transplant) Jan 21–Feb 4 (sow outdoors) | – |
| Celery | Oct 15–29 | Jan 14–21 (transplant) | – |
| Basil | Nov 26–Dec 10 | Jan 14–28 (transplant) Jan 14–28 (sow outdoors) | – |
| Cilantro | – | Dec 24–Jan 21 (sow outdoors) | Nov 3–17 (sowing) |
| Parsley | Oct 29–Nov 12 | Dec 24–Jan 7 (transplant) Dec 17–Jan 7 (sow outdoors) | – |
| Dill | – | Jan 7–21 (sow outdoors) | Nov 3–17 (sowing) |
| Sunflower | – | Jan 7–21 (sow outdoors) | – |
| Asparagus (crowns) | – | Dec 10–24 (transplant) | – |
| Rhubarb (crowns) | – | Dec 10–24 (transplant) | – |
| Strawberry (plants) | – | Dec 10–24 (transplant) | Oct 20–Nov 17 (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: Willow Beach, AZ (NOAA GHCN-Daily ID USC00029376), elevation 740 ft, 29.1 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Kingman Mohave Co AP, AZ | 30 mi | Apr 2 | Nov 11 |
| Laughlin, NV | 32 mi | Jan 5 | Dec 24 |
| Temple Bar, AZ | 32 mi | Feb 4 | Dec 10 |
The average last-frost dates of these stations span 90 days, a rough guide to local variation. See data sources & methods.
Frost questions for 86441
When is the last frost in 86441?
The average (50% chance) last spring freeze of 32°F for ZIP 86441 is January 7. For a more cautious planting date, use February 1, when only 1 year in 10 still sees a later freeze.
When is the first frost in 86441?
The average first fall freeze is December 29. In 1 year in 10 it comes by December 10.
What hardiness zone is 86441?
ZIP 86441 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 86441 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
86431 Chloride 86445 White Hills 86409 New Kingman-Butler 86429 Bullhead City 86444 Meadview 86413 Golden Valley 86443 89046 Nelson
Other ZIP codes in Mohave County
85360 86021 86401 86403 86404 86406 86409 86411 86413 86426 86429 86431 86432 86433 86434 86436 86437 86438 86440 86442 86443 86444 86445 All Mohave County frost dates · Arizona frost dates
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- 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.