Fall in zone 9bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 85019 (Phoenix, 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, Phoenix Sky Harbor Intl AP, AZ (10 miles away).
Freezes are uncommon here
NOAA's normals for this station show a 32°F night in about 18% 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.
- Average last spring frostJan 550% chance of a 32°F freeze after this date
- Average first fall frostJan 3 (next year)50% chance of a 32°F freeze by this date
- Growing season (frost-free)year-round in a typical yearmedian, 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
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 85019 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 20 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 27–Oct 25
- Kale: fall transplant Oct 11–Nov 8
- Collards: fall sowing Sep 27–Oct 25
- Collards: fall transplant Oct 11–Nov 8
- Broccoli: fall transplant Sep 27–Oct 25
- Cabbage: fall transplant Sep 27–Oct 25
- Cauliflower: fall transplant Sep 27–Oct 25
- Brussels sprouts: start seeds indoors Oct 13–27
- Carrot: fall sowing Oct 11–25
- Pea (garden, snap, snow): fall sowing Oct 11–25
- Onion (bulbing): start seeds indoors Oct 13–27
- Leek: start seeds indoors Oct 13–27
- Bean, bush (snap): fall sowing Oct 11–25
- Cucumber: fall sowing Oct 11–25
- Summer squash / zucchini: fall sowing Oct 11–25
- Celery: start seeds indoors Oct 13–27
Coming up in the next 3 weeks
- Pepper (sweet and hot): start seeds indoors Oct 27–Nov 10
- Eggplant: start seeds indoors Oct 27–Nov 10
- Lettuce: fall sowing Oct 25–Nov 22
- Lettuce: fall transplant Nov 8–29
- Spinach: fall sowing Nov 8–29
- Broccoli: start seeds indoors Oct 27–Nov 10
- Cabbage: start seeds indoors Oct 27–Nov 10
- Cauliflower: start seeds indoors Oct 27–Nov 10
- Kohlrabi: fall sowing Oct 25–Nov 8
- Bok choy / Asian greens: fall sowing Nov 8–22
- Arugula: fall sowing Nov 8–Dec 6
- Mustard greens: fall sowing Nov 8–22
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 19 (prior Dec) |
| 50% (the "average" last frost) | Jan 5 |
| 10% (cautious: only 1 year in 10 freezes later) | Jan 22 |
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 18 |
| 50% (the "average" first frost) | Jan 3 (next year) |
| 90% (late: most years have frozen by now) | Jan 21 (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 6 | Dec 24 |
| 32°F (freeze) | Jan 5 | Jan 3 (next year) |
| 28°F (hard freeze) | n/a | n/a |
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 85019
Dates count from your average last spring frost (Jan 5) and first fall frost (Jan 3). 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 10–24 | Jan 12–26 (transplant) | Sep 6–Oct 4 (transplant) |
| Pepper (sweet and hot) | Oct 27–Nov 10 | Jan 19–Feb 2 (transplant) | Sep 13–Oct 4 (transplant) |
| Eggplant | Oct 27–Nov 10 | Jan 19–Feb 2 (transplant) | Sep 13–Oct 4 (transplant) |
| Tomatillo | Nov 10–24 | Jan 12–26 (transplant) | – |
| Lettuce | Nov 10–24 | Dec 15–Jan 5 (transplant) Dec 8–Jan 19 (sow outdoors) | Nov 8–29 (transplant) Oct 25–Nov 22 (sowing) |
| Spinach | – | Nov 24–Dec 15 (sow outdoors) | Nov 8–29 (sowing) |
| Kale | Nov 10–24 | Dec 8–22 (transplant) Dec 8–22 (sow outdoors) | Oct 11–Nov 8 (transplant) Sep 27–Oct 25 (sowing) |
| Collards | Nov 10–24 | Dec 8–Jan 5 (transplant) Dec 8–Jan 5 (sow outdoors) | Oct 11–Nov 8 (transplant) Sep 27–Oct 25 (sowing) |
| Broccoli | Oct 27–Nov 10 | Dec 8–22 (transplant) | Sep 27–Oct 25 (transplant) |
| Cabbage | Oct 27–Nov 10 | Dec 8–22 (transplant) | Sep 27–Oct 25 (transplant) |
| Cauliflower | Oct 27–Nov 10 | Dec 22–Jan 5 (transplant) | Sep 27–Oct 25 (transplant) |
| Brussels sprouts | Oct 13–27 | Dec 8–22 (transplant) | Sep 13–Oct 4 (transplant) |
| Kohlrabi | Nov 10–24 | Dec 8–22 (transplant) Dec 8–22 (sow outdoors) | Oct 25–Nov 8 (sowing) |
| Bok choy / Asian greens | – | Dec 8–22 (sow outdoors) | Nov 8–22 (sowing) |
| Arugula | – | Dec 8–Jan 5 (sow outdoors) | Nov 8–Dec 6 (sowing) |
| Mustard greens | – | Dec 8–29 (sow outdoors) | Nov 8–22 (sowing) |
| Swiss chard | Nov 24–Dec 8 | Dec 22–Jan 12 (transplant) Dec 22–Jan 19 (sow outdoors) | Oct 25–Nov 8 (sowing) |
| Beet | – | Dec 8–Jan 5 (sow outdoors) | Oct 25–Nov 8 (sowing) |
| Carrot | – | Dec 15–Jan 12 (sow outdoors) | Oct 11–25 (sowing) |
| Radish | – | Dec 1–Jan 12 (sow outdoors) | Nov 22–Dec 6 (sowing) |
| Turnip | – | Dec 8–29 (sow outdoors) | Oct 25–Nov 8 (sowing) |
| Parsnip | – | Dec 15–Jan 5 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Nov 10–Dec 8 (sow outdoors) | Oct 11–25 (sowing) |
| Onion (bulbing) | Oct 13–27 | Nov 24–Dec 8 (transplant) | – |
| Green onion / scallion | – | Nov 24–Dec 22 (sow outdoors) | Oct 25–Nov 8 (sowing) |
| Leek | Oct 13–27 | Dec 8–22 (transplant) | – |
| Garlic | – | – | Nov 22–Dec 20 (sowing) |
| Shallot | – | Nov 24–Dec 8 (transplant) | Nov 22–Dec 20 (sowing) |
| Potato | – | Dec 8–22 (transplant) | Sep 13–27 (transplant) |
| Sweet potato | – | Jan 26–Feb 9 (transplant) | – |
| Sweet corn | – | Jan 12–26 (sow outdoors) | – |
| Bean, bush (snap) | – | Jan 12–26 (sow outdoors) | Oct 11–25 (sowing) |
| Bean, pole | – | Jan 12–26 (sow outdoors) | – |
| Lima bean | – | Jan 19–Feb 2 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jan 26–Feb 16 (sow outdoors) | – |
| Cucumber | Dec 8–15 | Jan 12–26 (transplant) Jan 12–26 (sow outdoors) | Oct 11–25 (sowing) |
| Summer squash / zucchini | Dec 8–15 | Jan 12–26 (transplant) Jan 12–26 (sow outdoors) | Oct 11–25 (sowing) |
| Winter squash | Dec 8–15 | Jan 12–26 (transplant) Jan 12–26 (sow outdoors) | – |
| Pumpkin | – | Jan 12–26 (sow outdoors) | – |
| Watermelon | Dec 8–15 | Jan 19–Feb 2 (transplant) Jan 19–Feb 2 (sow outdoors) | – |
| Cantaloupe / muskmelon | Dec 8–15 | Jan 19–Feb 2 (transplant) Jan 19–Feb 2 (sow outdoors) | – |
| Okra | Nov 24–Dec 8 | Jan 19–Feb 2 (transplant) Jan 19–Feb 2 (sow outdoors) | – |
| Celery | Oct 13–27 | Jan 12–19 (transplant) | – |
| Basil | Nov 24–Dec 8 | Jan 12–26 (transplant) Jan 12–26 (sow outdoors) | – |
| Cilantro | – | Dec 22–Jan 19 (sow outdoors) | Nov 8–22 (sowing) |
| Parsley | Oct 27–Nov 10 | Dec 22–Jan 5 (transplant) Dec 15–Jan 5 (sow outdoors) | – |
| Dill | – | Jan 5–19 (sow outdoors) | Nov 8–22 (sowing) |
| Sunflower | – | Jan 5–19 (sow outdoors) | – |
| Asparagus (crowns) | – | Dec 8–22 (transplant) | – |
| Rhubarb (crowns) | – | Dec 8–22 (transplant) | – |
| Strawberry (plants) | – | Dec 8–22 (transplant) | Oct 25–Nov 22 (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: Phoenix Sky Harbor Intl AP, AZ (NOAA GHCN-Daily ID USW00023183), elevation 1,107 ft, 9.9 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| South Phoenix, AZ | 10 mi | Jan 21 | Dec 16 |
| Youngtown, AZ | 11 mi | Jan 20 | Dec 15 |
| Laveen 3 SSE, AZ | 12 mi | Jan 14 | Dec 22 |
The average last-frost dates of these stations span 16 days, a rough guide to local variation. See data sources & methods.
Frost questions for 85019
When is the last frost in 85019?
The average (50% chance) last spring freeze of 32°F for ZIP 85019 is January 5. For a more cautious planting date, use January 22, when only 1 year in 10 still sees a later freeze.
When is the first frost in 85019?
The average first fall freeze is January 3 (next year). In 1 year in 10 it comes by December 18.
What hardiness zone is 85019?
ZIP 85019 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 85019 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
85017 Phoenix 85031 Phoenix 85015 Phoenix 85301 Glendale 85051 Phoenix 85013 Phoenix 85035 Phoenix 85012 Phoenix
Other ZIP codes in Maricopa County
85003 85004 85006 85007 85008 85009 85012 85013 85014 85015 85016 85017 85018 85020 85021 85022 85023 85024 85026 85027 85028 85029 85031 85032 All Maricopa 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.