Fall in zone 6bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 86004 (Doney Park, 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, Sunset Crater Nm, AZ (10 miles away).
- Average last spring frostJun 1650% chance of a 32°F freeze after this date
- Average first fall frostSep 1950% chance of a 32°F freeze by this date
- Growing season (frost-free)94 daysmedian, 32°F threshold
- USDA hardiness zone6b-5 to 0°F avg. coldest night
Get The Dial for 86004 (Doney Park)
Frost and freeze alerts from the NWS forecast for 86004, the spring soil-temperature heads-up for pre-emergent, and a short weekly yard-timing email.
- Freeze alerts
- Soil-temp heads-up
- Weekly yard to-dos
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.
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
48°F Below 50°F
24-hour average · latest 48°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Williams 35 NNW (60 mi).
4-inch depth
51°F 50–55°F
24-hour average · latest 51°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Williams 35 NNW (60 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 86004 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 51°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) | Jun 3 |
| 50% (the "average" last frost) | Jun 16 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 29 |
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) | Aug 31 |
| 50% (the "average" first frost) | Sep 19 |
| 90% (late: most years have frozen by now) | Sep 30 |
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) | Jun 16 | Sep 19 |
| 28°F (hard freeze) | Jun 5 | Sep 28 |
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 86004
Dates count from your average last spring frost (Jun 16) and first fall frost (Sep 19). 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 21–May 5 | Jun 23–Jul 7 (transplant) | – |
| Pepper (sweet and hot) | Apr 7–21 | Jun 30–Jul 14 (transplant) | – |
| Eggplant | Apr 7–21 | Jun 30–Jul 14 (transplant) | – |
| Tomatillo | Apr 21–May 5 | Jun 23–Jul 7 (transplant) | – |
| Lettuce | Apr 21–May 5 | May 26–Jun 16 (transplant) May 19–Jun 30 (sow outdoors) | Jul 25–Aug 15 (transplant) Jul 11–Aug 8 (sowing) |
| Spinach | – | May 5–26 (sow outdoors) | Jul 25–Aug 15 (sowing) |
| Kale | Apr 21–May 5 | May 19–Jun 2 (transplant) May 19–Jun 2 (sow outdoors) | Jun 27–Jul 25 (transplant) Jun 13–Jul 11 (sowing) |
| Collards | Apr 21–May 5 | May 19–Jun 16 (transplant) May 19–Jun 16 (sow outdoors) | Jun 27–Jul 25 (transplant) |
| Broccoli | Apr 7–21 | May 19–Jun 2 (transplant) | Jun 13–Jul 11 (transplant) |
| Cabbage | Apr 7–21 | May 19–Jun 2 (transplant) | Jun 13–Jul 11 (transplant) |
| Cauliflower | Apr 7–21 | Jun 2–16 (transplant) | – |
| Brussels sprouts | Mar 24–Apr 7 | May 19–Jun 2 (transplant) | – |
| Kohlrabi | Apr 21–May 5 | May 19–Jun 2 (transplant) May 19–Jun 2 (sow outdoors) | Jul 11–25 (sowing) |
| Bok choy / Asian greens | – | May 19–Jun 2 (sow outdoors) | Jul 25–Aug 8 (sowing) |
| Arugula | – | May 19–Jun 16 (sow outdoors) | Jul 25–Aug 22 (sowing) |
| Mustard greens | – | May 19–Jun 9 (sow outdoors) | Jul 25–Aug 8 (sowing) |
| Swiss chard | May 5–19 | Jun 2–23 (transplant) Jun 2–30 (sow outdoors) | Jul 11–25 (sowing) |
| Beet | – | May 19–Jun 16 (sow outdoors) | Jul 11–25 (sowing) |
| Carrot | – | May 26–Jun 23 (sow outdoors) | Jun 27–Jul 11 (sowing) |
| Radish | – | May 12–Jun 23 (sow outdoors) | Aug 8–22 (sowing) |
| Turnip | – | May 19–Jun 9 (sow outdoors) | Jul 11–25 (sowing) |
| Parsnip | – | May 26–Jun 16 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 21–May 19 (sow outdoors) | Jun 27–Jul 11 (sowing) |
| Onion (bulbing) | Mar 24–Apr 7 | May 5–19 (transplant) | – |
| Green onion / scallion | – | May 5–Jun 2 (sow outdoors) | Jul 11–25 (sowing) |
| Leek | Mar 24–Apr 7 | May 19–Jun 2 (transplant) | – |
| Garlic | – | – | Aug 8–Sep 5 (sowing) |
| Shallot | – | May 5–19 (transplant) | Aug 8–Sep 5 (sowing) |
| Potato | – | May 19–Jun 2 (transplant) | – |
| Sweet potato | – | Jul 7–21 (transplant) | – |
| Sweet corn | – | Jun 23–Jul 7 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 23–Jul 7 (sow outdoors) | – |
| Bean, pole | – | Jun 23–Jul 7 (sow outdoors) | – |
| Lima bean | – | Jun 30–Jul 14 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jul 7–28 (sow outdoors) | – |
| Cucumber | May 19–26 | Jun 23–Jul 7 (transplant) Jun 23–Jul 7 (sow outdoors) | – |
| Summer squash / zucchini | May 19–26 | Jun 23–Jul 7 (transplant) Jun 23–Jul 7 (sow outdoors) | – |
| Winter squash | May 19–26 | Jun 23–Jul 7 (transplant) Jun 23–Jul 7 (sow outdoors) | – |
| Pumpkin | – | Jun 23–Jul 7 (sow outdoors) | – |
| Watermelon | May 19–26 | Jun 30–Jul 14 (transplant) Jun 30–Jul 14 (sow outdoors) | – |
| Cantaloupe / muskmelon | May 19–26 | Jun 30–Jul 14 (transplant) Jun 30–Jul 14 (sow outdoors) | – |
| Okra | May 5–19 | Jun 30–Jul 14 (transplant) Jun 30–Jul 14 (sow outdoors) | – |
| Celery | Mar 24–Apr 7 | Jun 23–30 (transplant) | – |
| Basil | May 5–19 | Jun 23–Jul 7 (transplant) Jun 23–Jul 7 (sow outdoors) | – |
| Cilantro | – | Jun 2–30 (sow outdoors) | Jul 25–Aug 8 (sowing) |
| Parsley | Apr 7–21 | Jun 2–16 (transplant) May 26–Jun 16 (sow outdoors) | – |
| Dill | – | Jun 16–30 (sow outdoors) | Jul 25–Aug 8 (sowing) |
| Sunflower | – | Jun 16–30 (sow outdoors) | – |
| Asparagus (crowns) | – | May 19–Jun 2 (transplant) | – |
| Rhubarb (crowns) | – | May 19–Jun 2 (transplant) | – |
| Strawberry (plants) | – | May 19–Jun 2 (transplant) | Jul 11–Aug 8 (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: Sunset Crater Nm, AZ (NOAA GHCN-Daily ID USC00028329), elevation 6,980 ft, 9.6 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Wupatki Nm, AZ | 10 mi | Apr 7 | Nov 3 |
| Twin Arrows, AZ | 16 mi | Apr 14 | Oct 25 |
| Walnut Canyon Nm, AZ | 16 mi | May 13 | Oct 6 |
The average last-frost dates of these stations span 71 days, a rough guide to local variation. See data sources & methods.
Frost questions for 86004
When is the last frost in 86004?
The average (50% chance) last spring freeze of 32°F for ZIP 86004 is June 16. For a more cautious planting date, use June 29, when only 1 year in 10 still sees a later freeze.
When is the first frost in 86004?
The average first fall freeze is September 19. In 1 year in 10 it comes by August 31.
What hardiness zone is 86004?
ZIP 86004 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 86004 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
86003 86035 Leupp 86011 Flagstaff 86001 Fort Valley 86005 Flagstaff 86015 Bellemont 86016 86038 Mormon Lake
Other ZIP codes in Coconino County
85931 86001 86003 86005 86011 86015 86016 86017 86018 86020 86022 86023 86024 86030 86035 86036 86038 86040 86044 86045 86046 86052 86053 86320 All Coconino County frost dates · Arizona frost dates
Never miss a frost: get The Dial
Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- Freeze alerts
- Soil-temp heads-up
- Weekly yard to-dos
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.