Fall in zone 6bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 85923 (Clay 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, Heber (black Mesa) Rs, AZ (13 miles away).
- Average last spring frostMay 2350% chance of a 32°F freeze after this date
- Average first fall frostOct 550% chance of a 32°F freeze by this date
- Growing season (frost-free)135 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
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 85923 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 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 23 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 6 |
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 24 |
| 50% (the "average" first frost) | Oct 5 |
| 90% (late: most years have frozen by now) | Oct 19 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Jun 3 | Sep 27 |
| 32°F (freeze) | May 23 | Oct 5 |
| 28°F (hard freeze) | May 8 | Oct 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 85923
Dates count from your average last spring frost (May 23) and first fall frost (Oct 5). 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 28–Apr 11 | May 30–Jun 13 (transplant) | – |
| Pepper (sweet and hot) | Mar 14–28 | Jun 6–20 (transplant) | – |
| Eggplant | Mar 14–28 | Jun 6–20 (transplant) | – |
| Tomatillo | Mar 28–Apr 11 | May 30–Jun 13 (transplant) | – |
| Lettuce | Mar 28–Apr 11 | May 2–23 (transplant) Apr 25–Jun 6 (sow outdoors) | Aug 10–31 (transplant) Jul 27–Aug 24 (sowing) |
| Spinach | – | Apr 11–May 2 (sow outdoors) | Aug 10–31 (sowing) |
| Kale | Mar 28–Apr 11 | Apr 25–May 9 (transplant) Apr 25–May 9 (sow outdoors) | Jul 13–Aug 10 (transplant) Jun 29–Jul 27 (sowing) |
| Collards | Mar 28–Apr 11 | Apr 25–May 23 (transplant) Apr 25–May 23 (sow outdoors) | Jul 13–Aug 10 (transplant) Jun 29–Jul 27 (sowing) |
| Broccoli | Mar 14–28 | Apr 25–May 9 (transplant) | Jun 29–Jul 27 (transplant) |
| Cabbage | Mar 14–28 | Apr 25–May 9 (transplant) | Jun 29–Jul 27 (transplant) |
| Cauliflower | Mar 14–28 | May 9–23 (transplant) | Jun 29–Jul 27 (transplant) |
| Brussels sprouts | Feb 28–Mar 14 | Apr 25–May 9 (transplant) | Jun 15–Jul 6 (transplant) |
| Kohlrabi | Mar 28–Apr 11 | Apr 25–May 9 (transplant) Apr 25–May 9 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Bok choy / Asian greens | – | Apr 25–May 9 (sow outdoors) | Aug 10–24 (sowing) |
| Arugula | – | Apr 25–May 23 (sow outdoors) | Aug 10–Sep 7 (sowing) |
| Mustard greens | – | Apr 25–May 16 (sow outdoors) | Aug 10–24 (sowing) |
| Swiss chard | Apr 11–25 | May 9–30 (transplant) May 9–Jun 6 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Beet | – | Apr 25–May 23 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Carrot | – | May 2–30 (sow outdoors) | Jul 13–27 (sowing) |
| Radish | – | Apr 18–May 30 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Turnip | – | Apr 25–May 16 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Parsnip | – | May 2–23 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Mar 28–Apr 25 (sow outdoors) | Jul 13–27 (sowing) |
| Onion (bulbing) | Feb 28–Mar 14 | Apr 11–25 (transplant) | – |
| Green onion / scallion | – | Apr 11–May 9 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Leek | Feb 28–Mar 14 | Apr 25–May 9 (transplant) | – |
| Garlic | – | – | Aug 24–Sep 21 (sowing) |
| Shallot | – | Apr 11–25 (transplant) | Aug 24–Sep 21 (sowing) |
| Potato | – | Apr 25–May 9 (transplant) | Jun 15–29 (transplant) |
| Sweet potato | – | Jun 13–27 (transplant) | – |
| Sweet corn | – | May 30–Jun 13 (sow outdoors) | – |
| Bean, bush (snap) | – | May 30–Jun 13 (sow outdoors) | – |
| Bean, pole | – | May 30–Jun 13 (sow outdoors) | – |
| Lima bean | – | Jun 6–20 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 13–Jul 4 (sow outdoors) | – |
| Cucumber | Apr 25–May 2 | May 30–Jun 13 (transplant) May 30–Jun 13 (sow outdoors) | – |
| Summer squash / zucchini | Apr 25–May 2 | May 30–Jun 13 (transplant) May 30–Jun 13 (sow outdoors) | – |
| Winter squash | Apr 25–May 2 | May 30–Jun 13 (transplant) May 30–Jun 13 (sow outdoors) | – |
| Pumpkin | – | May 30–Jun 13 (sow outdoors) | – |
| Watermelon | Apr 25–May 2 | Jun 6–20 (transplant) Jun 6–20 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 25–May 2 | Jun 6–20 (transplant) Jun 6–20 (sow outdoors) | – |
| Okra | Apr 11–25 | Jun 6–20 (transplant) Jun 6–20 (sow outdoors) | – |
| Celery | Feb 28–Mar 14 | May 30–Jun 6 (transplant) | – |
| Basil | Apr 11–25 | May 30–Jun 13 (transplant) May 30–Jun 13 (sow outdoors) | – |
| Cilantro | – | May 9–Jun 6 (sow outdoors) | Aug 10–24 (sowing) |
| Parsley | Mar 14–28 | May 9–23 (transplant) May 2–23 (sow outdoors) | – |
| Dill | – | May 23–Jun 6 (sow outdoors) | Aug 10–24 (sowing) |
| Sunflower | – | May 23–Jun 6 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 25–May 9 (transplant) | – |
| Rhubarb (crowns) | – | Apr 25–May 9 (transplant) | – |
| Strawberry (plants) | – | Apr 25–May 9 (transplant) | Jul 27–Aug 24 (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: Heber (black Mesa) Rs, AZ (NOAA GHCN-Daily ID USC00023961), elevation 6,590 ft, 13.3 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Snowflake, AZ | 19 mi | May 11 | Oct 10 |
| Show Low AP, AZ | 19 mi | May 5 | Oct 15 |
| Pinetop 2E, AZ | 28 mi | May 22 | Oct 6 |
The average last-frost dates of these stations span 18 days, a rough guide to local variation. See data sources & methods.
Frost questions for 85923
When is the last frost in 85923?
The average (50% chance) last spring freeze of 32°F for ZIP 85923 is May 23. For a more cautious planting date, use June 6, when only 1 year in 10 still sees a later freeze.
When is the first frost in 85923?
The average first fall freeze is October 5. In 1 year in 10 it comes by September 24.
What hardiness zone is 85923?
ZIP 85923 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 85923 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
85934 Pinedale 85933 Heber-Overgaard 85902 85939 Taylor 85911 Cibecue 85901 Show Low 85928 85929 Pinetop-Lakeside
Other ZIP codes in Navajo County
85901 85902 85911 85912 85926 85928 85929 85933 85934 85935 85937 85939 85942 86025 86029 86031 86032 86033 86034 86039 86042 86043 86047 86054 All Navajo 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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- 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.