Fall in zone 7aPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 99329 (Dixie, WA)
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, Walla Walla Rgnl AP, WA (7 miles away).
- Average last spring frostMar 2750% chance of a 32°F freeze after this date
- Average first fall frostOct 3150% chance of a 32°F freeze by this date
- Growing season (frost-free)219 daysmedian, 32°F threshold
- USDA hardiness zone7a0 to 5°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 99329 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.
Your average first frost is Oct 31: skip heavy pruning in the 6–8 weeks before it, because new growth may not harden off in time.
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) | Mar 3 |
| 50% (the "average" last frost) | Mar 27 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 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) | Oct 15 |
| 50% (the "average" first frost) | Oct 31 |
| 90% (late: most years have frozen by now) | Nov 17 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 21 | Oct 19 |
| 32°F (freeze) | Mar 27 | Oct 31 |
| 28°F (hard freeze) | Mar 4 | Nov 14 |
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 99329
Dates count from your average last spring frost (Mar 27) and first fall frost (Oct 31). 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 | Jan 30–Feb 13 | Apr 3–17 (transplant) | Jul 4–Aug 1 (transplant) |
| Pepper (sweet and hot) | Jan 16–30 | Apr 10–24 (transplant) | Jul 11–Aug 1 (transplant) |
| Eggplant | Jan 16–30 | Apr 10–24 (transplant) | Jul 11–Aug 1 (transplant) |
| Tomatillo | Jan 30–Feb 13 | Apr 3–17 (transplant) | – |
| Lettuce | Jan 30–Feb 13 | Mar 6–27 (transplant) Feb 27–Apr 10 (sow outdoors) | Sep 5–26 (transplant) Aug 22–Sep 19 (sowing) |
| Spinach | – | Feb 13–Mar 6 (sow outdoors) | Sep 5–26 (sowing) |
| Kale | Jan 30–Feb 13 | Feb 27–Mar 13 (transplant) Feb 27–Mar 13 (sow outdoors) | Aug 8–Sep 5 (transplant) Jul 25–Aug 22 (sowing) |
| Collards | Jan 30–Feb 13 | Feb 27–Mar 27 (transplant) Feb 27–Mar 27 (sow outdoors) | Aug 8–Sep 5 (transplant) Jul 25–Aug 22 (sowing) |
| Broccoli | Jan 16–30 | Feb 27–Mar 13 (transplant) | Jul 25–Aug 22 (transplant) |
| Cabbage | Jan 16–30 | Feb 27–Mar 13 (transplant) | Jul 25–Aug 22 (transplant) |
| Cauliflower | Jan 16–30 | Mar 13–27 (transplant) | Jul 25–Aug 22 (transplant) |
| Brussels sprouts | Jan 2–16 | Feb 27–Mar 13 (transplant) | Jul 11–Aug 1 (transplant) |
| Kohlrabi | Jan 30–Feb 13 | Feb 27–Mar 13 (transplant) Feb 27–Mar 13 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Bok choy / Asian greens | – | Feb 27–Mar 13 (sow outdoors) | Sep 5–19 (sowing) |
| Arugula | – | Feb 27–Mar 27 (sow outdoors) | Sep 5–Oct 3 (sowing) |
| Mustard greens | – | Feb 27–Mar 20 (sow outdoors) | Sep 5–19 (sowing) |
| Swiss chard | Feb 13–27 | Mar 13–Apr 3 (transplant) Mar 13–Apr 10 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Beet | – | Feb 27–Mar 27 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Carrot | – | Mar 6–Apr 3 (sow outdoors) | Aug 8–22 (sowing) |
| Radish | – | Feb 20–Apr 3 (sow outdoors) | Sep 19–Oct 3 (sowing) |
| Turnip | – | Feb 27–Mar 20 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Parsnip | – | Mar 6–27 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Jan 30–Feb 27 (sow outdoors) | Aug 8–22 (sowing) |
| Onion (bulbing) | Jan 2–16 | Feb 13–27 (transplant) | – |
| Green onion / scallion | – | Feb 13–Mar 13 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Leek | Jan 2–16 | Feb 27–Mar 13 (transplant) | – |
| Garlic | – | – | Sep 19–Oct 17 (sowing) |
| Shallot | – | Feb 13–27 (transplant) | Sep 19–Oct 17 (sowing) |
| Potato | – | Feb 27–Mar 13 (transplant) | Jul 11–25 (transplant) |
| Sweet potato | – | Apr 17–May 1 (transplant) | – |
| Sweet corn | – | Apr 3–17 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 3–17 (sow outdoors) | Aug 8–22 (sowing) |
| Bean, pole | – | Apr 3–17 (sow outdoors) | – |
| Lima bean | – | Apr 10–24 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 17–May 8 (sow outdoors) | – |
| Cucumber | Feb 27–Mar 6 | Apr 3–17 (transplant) Apr 3–17 (sow outdoors) | Aug 8–22 (sowing) |
| Summer squash / zucchini | Feb 27–Mar 6 | Apr 3–17 (transplant) Apr 3–17 (sow outdoors) | Aug 8–22 (sowing) |
| Winter squash | Feb 27–Mar 6 | Apr 3–17 (transplant) Apr 3–17 (sow outdoors) | – |
| Pumpkin | – | Apr 3–17 (sow outdoors) | – |
| Watermelon | Feb 27–Mar 6 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | – |
| Cantaloupe / muskmelon | Feb 27–Mar 6 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | – |
| Okra | Feb 13–27 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | – |
| Celery | Jan 2–16 | Apr 3–10 (transplant) | – |
| Basil | Feb 13–27 | Apr 3–17 (transplant) Apr 3–17 (sow outdoors) | – |
| Cilantro | – | Mar 13–Apr 10 (sow outdoors) | Sep 5–19 (sowing) |
| Parsley | Jan 16–30 | Mar 13–27 (transplant) Mar 6–27 (sow outdoors) | – |
| Dill | – | Mar 27–Apr 10 (sow outdoors) | Sep 5–19 (sowing) |
| Sunflower | – | Mar 27–Apr 10 (sow outdoors) | – |
| Asparagus (crowns) | – | Feb 27–Mar 13 (transplant) | – |
| Rhubarb (crowns) | – | Feb 27–Mar 13 (transplant) | – |
| Strawberry (plants) | – | Feb 27–Mar 13 (transplant) | Aug 22–Sep 19 (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: Walla Walla Rgnl AP, WA (NOAA GHCN-Daily ID USW00024160), elevation 1,166 ft, 7.4 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Dayton 1 WSW, WA | 14 mi | Apr 28 | Oct 13 |
| Whitman Mission, WA | 17 mi | May 2 | Oct 1 |
| Milton Freewater, OR | 19 mi | Mar 25 | Oct 29 |
The average last-frost dates of these stations span 39 days, a rough guide to local variation. See data sources & methods.
Frost questions for 99329
When is the last frost in 99329?
The average (50% chance) last spring freeze of 32°F for ZIP 99329 is March 27. For a more cautious planting date, use April 22, when only 1 year in 10 still sees a later freeze.
When is the first frost in 99329?
The average first fall freeze is October 31. In 1 year in 10 it comes by October 15.
What hardiness zone is 99329?
ZIP 99329 is in USDA zone 7a (0 to 5°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 99329 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
99361 Waitsburg 99362 Walla Walla 99324 College Place 99328 Dayton 97862 Umapine 99348 Prescott 97886 Weston 99360 Touchet
Other ZIP codes in Walla Walla County
99323 99324 99348 99360 99361 99362 99363 All Walla Walla County frost dates · Washington frost dates
Never miss a frost: get The Dial
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.