Fall in zone 8bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 97115 (Dundee, OR)
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, Rex 1 S, OR (6 miles away).
- Average last spring frostMar 2150% chance of a 32°F freeze after this date
- Average first fall frostNov 2250% chance of a 32°F freeze by this date
- Growing season (frost-free)241 daysmedian, 32°F threshold
- USDA hardiness zone8b15 to 20°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
58°F 55°F or warmer
24-hour average · latest 58°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Corvallis 10 SSW (61 mi).
4-inch depth
58°F 55°F or warmer
24-hour average · latest 58°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Corvallis 10 SSW (61 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 97115 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 58°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent (annual bluegrass, winter weeds): window open as soil cools through the 70s and 60s.
Fertilizer window
Lawn region: Pacific Northwest (west of the Cascades). Timing only; always follow the product label.
- 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
- Lettuce: fall transplant Sep 27–Oct 18
- Spinach: fall sowing Sep 27–Oct 18
- Arugula: fall sowing Sep 27–Oct 25
- Radish: fall sowing Oct 11–25
- Garlic: fall sowing Oct 11–Nov 8
- Shallot: fall sowing Oct 11–Nov 8
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 22: 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) | Feb 23 |
| 50% (the "average" last frost) | Mar 21 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 19 |
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) | Nov 4 |
| 50% (the "average" first frost) | Nov 22 |
| 90% (late: most years have frozen by now) | Dec 12 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 21 | Nov 3 |
| 32°F (freeze) | Mar 21 | Nov 22 |
| 28°F (hard freeze) | Feb 15 | Dec 10 |
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 97115
Dates count from your average last spring frost (Mar 21) and first fall frost (Nov 22). 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 24–Feb 7 | Mar 28–Apr 11 (transplant) | Jul 26–Aug 23 (transplant) |
| Pepper (sweet and hot) | Jan 10–24 | Apr 4–18 (transplant) | Aug 2–23 (transplant) |
| Eggplant | Jan 10–24 | Apr 4–18 (transplant) | Aug 2–23 (transplant) |
| Tomatillo | Jan 24–Feb 7 | Mar 28–Apr 11 (transplant) | – |
| Lettuce | Jan 24–Feb 7 | Feb 28–Mar 21 (transplant) Feb 21–Apr 4 (sow outdoors) | Sep 27–Oct 18 (transplant) Sep 13–Oct 11 (sowing) |
| Spinach | – | Feb 7–28 (sow outdoors) | Sep 27–Oct 18 (sowing) |
| Kale | Jan 24–Feb 7 | Feb 21–Mar 7 (transplant) Feb 21–Mar 7 (sow outdoors) | Aug 30–Sep 27 (transplant) Aug 16–Sep 13 (sowing) |
| Collards | Jan 24–Feb 7 | Feb 21–Mar 21 (transplant) Feb 21–Mar 21 (sow outdoors) | Aug 30–Sep 27 (transplant) Aug 16–Sep 13 (sowing) |
| Broccoli | Jan 10–24 | Feb 21–Mar 7 (transplant) | Aug 16–Sep 13 (transplant) |
| Cabbage | Jan 10–24 | Feb 21–Mar 7 (transplant) | Aug 16–Sep 13 (transplant) |
| Cauliflower | Jan 10–24 | Mar 7–21 (transplant) | Aug 16–Sep 13 (transplant) |
| Brussels sprouts | Dec 27–Jan 10 | Feb 21–Mar 7 (transplant) | Aug 2–23 (transplant) |
| Kohlrabi | Jan 24–Feb 7 | Feb 21–Mar 7 (transplant) Feb 21–Mar 7 (sow outdoors) | Sep 13–27 (sowing) |
| Bok choy / Asian greens | – | Feb 21–Mar 7 (sow outdoors) | Sep 27–Oct 11 (sowing) |
| Arugula | – | Feb 21–Mar 21 (sow outdoors) | Sep 27–Oct 25 (sowing) |
| Mustard greens | – | Feb 21–Mar 14 (sow outdoors) | Sep 27–Oct 11 (sowing) |
| Swiss chard | Feb 7–21 | Mar 7–28 (transplant) Mar 7–Apr 4 (sow outdoors) | Sep 13–27 (sowing) |
| Beet | – | Feb 21–Mar 21 (sow outdoors) | Sep 13–27 (sowing) |
| Carrot | – | Feb 28–Mar 28 (sow outdoors) | Aug 30–Sep 13 (sowing) |
| Radish | – | Feb 14–Mar 28 (sow outdoors) | Oct 11–25 (sowing) |
| Turnip | – | Feb 21–Mar 14 (sow outdoors) | Sep 13–27 (sowing) |
| Parsnip | – | Feb 28–Mar 21 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Jan 24–Feb 21 (sow outdoors) | Aug 30–Sep 13 (sowing) |
| Onion (bulbing) | Dec 27–Jan 10 | Feb 7–21 (transplant) | – |
| Green onion / scallion | – | Feb 7–Mar 7 (sow outdoors) | Sep 13–27 (sowing) |
| Leek | Dec 27–Jan 10 | Feb 21–Mar 7 (transplant) | – |
| Garlic | – | – | Oct 11–Nov 8 (sowing) |
| Shallot | – | Feb 7–21 (transplant) | Oct 11–Nov 8 (sowing) |
| Potato | – | Feb 21–Mar 7 (transplant) | Aug 2–16 (transplant) |
| Sweet potato | – | Apr 11–25 (transplant) | – |
| Sweet corn | – | Mar 28–Apr 11 (sow outdoors) | – |
| Bean, bush (snap) | – | Mar 28–Apr 11 (sow outdoors) | Aug 30–Sep 13 (sowing) |
| Bean, pole | – | Mar 28–Apr 11 (sow outdoors) | – |
| Lima bean | – | Apr 4–18 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 11–May 2 (sow outdoors) | – |
| Cucumber | Feb 21–28 | Mar 28–Apr 11 (transplant) Mar 28–Apr 11 (sow outdoors) | Aug 30–Sep 13 (sowing) |
| Summer squash / zucchini | Feb 21–28 | Mar 28–Apr 11 (transplant) Mar 28–Apr 11 (sow outdoors) | Aug 30–Sep 13 (sowing) |
| Winter squash | Feb 21–28 | Mar 28–Apr 11 (transplant) Mar 28–Apr 11 (sow outdoors) | – |
| Pumpkin | – | Mar 28–Apr 11 (sow outdoors) | – |
| Watermelon | Feb 21–28 | Apr 4–18 (transplant) Apr 4–18 (sow outdoors) | – |
| Cantaloupe / muskmelon | Feb 21–28 | Apr 4–18 (transplant) Apr 4–18 (sow outdoors) | – |
| Okra | Feb 7–21 | Apr 4–18 (transplant) Apr 4–18 (sow outdoors) | – |
| Celery | Dec 27–Jan 10 | Mar 28–Apr 4 (transplant) | – |
| Basil | Feb 7–21 | Mar 28–Apr 11 (transplant) Mar 28–Apr 11 (sow outdoors) | – |
| Cilantro | – | Mar 7–Apr 4 (sow outdoors) | Sep 27–Oct 11 (sowing) |
| Parsley | Jan 10–24 | Mar 7–21 (transplant) Feb 28–Mar 21 (sow outdoors) | – |
| Dill | – | Mar 21–Apr 4 (sow outdoors) | Sep 27–Oct 11 (sowing) |
| Sunflower | – | Mar 21–Apr 4 (sow outdoors) | – |
| Asparagus (crowns) | – | Feb 21–Mar 7 (transplant) | – |
| Rhubarb (crowns) | – | Feb 21–Mar 7 (transplant) | – |
| Strawberry (plants) | – | Feb 21–Mar 7 (transplant) | Sep 13–Oct 11 (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: Rex 1 S, OR (NOAA GHCN-Daily ID USC00357127), elevation 515 ft, 5.8 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Mc Minnville, OR | 8 mi | Apr 5 | Nov 7 |
| Mcminnville Muni AP, OR | 8 mi | Apr 15 | Oct 26 |
| Aurora State AP, OR | 13 mi | Mar 16 | Nov 14 |
The average last-frost dates of these stations span 30 days, a rough guide to local variation. See data sources & methods.
Frost questions for 97115
When is the last frost in 97115?
The average (50% chance) last spring freeze of 32°F for ZIP 97115 is March 21. For a more cautious planting date, use April 19, when only 1 year in 10 still sees a later freeze.
When is the first frost in 97115?
The average first fall freeze is November 22. In 1 year in 10 it comes by November 4.
What hardiness zone is 97115?
ZIP 97115 is in USDA zone 8b (15 to 20°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 97115 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
97132 Newberg 97127 Lafayette 97137 St. Paul 97114 Dayton 97111 Carlton 97140 Sherwood 97020 Donald 97002 Butteville
Other ZIP codes in Yamhill County
97101 97111 97114 97127 97128 97132 97148 97347 97378 97396 All Yamhill County frost dates · Oregon 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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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.