Fall in zone 5bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 86015 (Bellemont, 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, Bellemont WFO, AZ (1 miles away).
- Average last spring frostJun 2150% chance of a 32°F freeze after this date
- Average first fall frostSep 1750% chance of a 32°F freeze by this date
- Growing season (frost-free)85 daysmedian, 32°F threshold
- USDA hardiness zone5b-15 to -10°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
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 (47 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 (47 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 86015 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 9 |
| 50% (the "average" last frost) | Jun 21 |
| 10% (cautious: only 1 year in 10 freezes later) | Jul 4 |
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 3 |
| 50% (the "average" first frost) | Sep 17 |
| 90% (late: most years have frozen by now) | Sep 29 |
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 21 | Sep 17 |
| 28°F (hard freeze) | Jun 9 | Sep 27 |
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 86015
Dates count from your average last spring frost (Jun 21) and first fall frost (Sep 17). 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 26–May 10 | Jun 28–Jul 12 (transplant) | – |
| Pepper (sweet and hot) | Apr 12–26 | Jul 5–19 (transplant) | – |
| Eggplant | Apr 12–26 | Jul 5–19 (transplant) | – |
| Tomatillo | Apr 26–May 10 | Jun 28–Jul 12 (transplant) | – |
| Lettuce | Apr 26–May 10 | May 31–Jun 21 (transplant) May 24–Jul 5 (sow outdoors) | Jul 23–Aug 13 (transplant) Jul 9–Aug 6 (sowing) |
| Spinach | – | May 10–31 (sow outdoors) | Jul 23–Aug 13 (sowing) |
| Kale | Apr 26–May 10 | May 24–Jun 7 (transplant) May 24–Jun 7 (sow outdoors) | Jun 25–Jul 23 (transplant) Jun 11–Jul 9 (sowing) |
| Collards | Apr 26–May 10 | May 24–Jun 21 (transplant) May 24–Jun 21 (sow outdoors) | Jun 25–Jul 23 (transplant) |
| Broccoli | Apr 12–26 | May 24–Jun 7 (transplant) | Jun 11–Jul 9 (transplant) |
| Cabbage | Apr 12–26 | May 24–Jun 7 (transplant) | Jun 11–Jul 9 (transplant) |
| Cauliflower | Apr 12–26 | Jun 7–21 (transplant) | – |
| Brussels sprouts | Mar 29–Apr 12 | May 24–Jun 7 (transplant) | – |
| Kohlrabi | Apr 26–May 10 | May 24–Jun 7 (transplant) May 24–Jun 7 (sow outdoors) | Jul 9–23 (sowing) |
| Bok choy / Asian greens | – | May 24–Jun 7 (sow outdoors) | Jul 23–Aug 6 (sowing) |
| Arugula | – | May 24–Jun 21 (sow outdoors) | Jul 23–Aug 20 (sowing) |
| Mustard greens | – | May 24–Jun 14 (sow outdoors) | Jul 23–Aug 6 (sowing) |
| Swiss chard | May 10–24 | Jun 7–28 (transplant) Jun 7–Jul 5 (sow outdoors) | Jul 9–23 (sowing) |
| Beet | – | May 24–Jun 21 (sow outdoors) | Jul 9–23 (sowing) |
| Carrot | – | May 31–Jun 28 (sow outdoors) | – |
| Radish | – | May 17–Jun 28 (sow outdoors) | Aug 6–20 (sowing) |
| Turnip | – | May 24–Jun 14 (sow outdoors) | Jul 9–23 (sowing) |
| Parsnip | – | May 31–Jun 21 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 26–May 24 (sow outdoors) | Jun 25–Jul 9 (sowing) |
| Onion (bulbing) | Mar 29–Apr 12 | May 10–24 (transplant) | – |
| Green onion / scallion | – | May 10–Jun 7 (sow outdoors) | Jul 9–23 (sowing) |
| Leek | Mar 29–Apr 12 | May 24–Jun 7 (transplant) | – |
| Garlic | – | – | Aug 6–Sep 3 (sowing) |
| Shallot | – | May 10–24 (transplant) | Aug 6–Sep 3 (sowing) |
| Potato | – | May 24–Jun 7 (transplant) | – |
| Sweet potato | – | Jul 12–26 (transplant) | – |
| Sweet corn | – | Jun 28–Jul 12 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 28–Jul 12 (sow outdoors) | – |
| Bean, pole | – | Jun 28–Jul 12 (sow outdoors) | – |
| Lima bean | – | Jul 5–19 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jul 12–Aug 2 (sow outdoors) | – |
| Cucumber | May 24–31 | Jun 28–Jul 12 (transplant) Jun 28–Jul 12 (sow outdoors) | – |
| Summer squash / zucchini | May 24–31 | Jun 28–Jul 12 (transplant) Jun 28–Jul 12 (sow outdoors) | – |
| Winter squash | May 24–31 | Jun 28–Jul 12 (transplant) Jun 28–Jul 12 (sow outdoors) | – |
| Pumpkin | – | Jun 28–Jul 12 (sow outdoors) | – |
| Watermelon | May 24–31 | Jul 5–19 (transplant) Jul 5–19 (sow outdoors) | – |
| Cantaloupe / muskmelon | May 24–31 | Jul 5–19 (transplant) Jul 5–19 (sow outdoors) | – |
| Okra | May 10–24 | Jul 5–19 (transplant) Jul 5–19 (sow outdoors) | – |
| Celery | Mar 29–Apr 12 | Jun 28–Jul 5 (transplant) | – |
| Basil | May 10–24 | Jun 28–Jul 12 (transplant) Jun 28–Jul 12 (sow outdoors) | – |
| Cilantro | – | Jun 7–Jul 5 (sow outdoors) | Jul 23–Aug 6 (sowing) |
| Parsley | Apr 12–26 | Jun 7–21 (transplant) May 31–Jun 21 (sow outdoors) | – |
| Dill | – | Jun 21–Jul 5 (sow outdoors) | Jul 23–Aug 6 (sowing) |
| Sunflower | – | Jun 21–Jul 5 (sow outdoors) | – |
| Asparagus (crowns) | – | May 24–Jun 7 (transplant) | – |
| Rhubarb (crowns) | – | May 24–Jun 7 (transplant) | – |
| Strawberry (plants) | – | May 24–Jun 7 (transplant) | Jul 9–Aug 6 (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: Bellemont WFO, AZ (NOAA GHCN-Daily ID USC00020678), elevation 7,152 ft, 0.7 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Ft Valley, AZ | 5 mi | Jun 11 | Sep 25 |
| Flagstaff 4 SW, AZ | 6 mi | Jun 23 | Sep 15 |
| Flagstaff Pulliam AP, AZ | 10 mi | Jun 4 | Sep 28 |
The average last-frost dates of these stations span 19 days, a rough guide to local variation. See data sources & methods.
Frost questions for 86015
When is the last frost in 86015?
The average (50% chance) last spring freeze of 32°F for ZIP 86015 is June 21. For a more cautious planting date, use July 4, when only 1 year in 10 still sees a later freeze.
When is the first frost in 86015?
The average first fall freeze is September 17. In 1 year in 10 it comes by September 3.
What hardiness zone is 86015?
ZIP 86015 is in USDA zone 5b (-15 to -10°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 86015 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
86018 Parks 86011 Flagstaff 86001 Fort Valley 86005 Flagstaff 86017 Munds Park 86336 Oak Creek Canyon 86046 Valle 86004 Doney Park
Other ZIP codes in Coconino County
85931 86001 86003 86004 86005 86011 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
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Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
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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.