Fall in zone 9aPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 97060 (Troutdale, 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, Troutdale, OR (2 miles away).
- Average last spring frostMar 2650% chance of a 32°F freeze after this date
- Average first fall frostNov 1750% chance of a 32°F freeze by this date
- Growing season (frost-free)237 daysmedian, 32°F threshold
- USDA hardiness zone9a20 to 25°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 97060 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 March to April.
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
- Arugula: fall sowing Sep 22–Oct 20
- Radish: fall sowing Oct 6–20
- Garlic: fall sowing Oct 6–Nov 3
- Shallot: fall sowing Oct 6–Nov 3
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 17: 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 27 |
| 50% (the "average" last frost) | Mar 26 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 21 |
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 26 |
| 50% (the "average" first frost) | Nov 17 |
| 90% (late: most years have frozen by now) | Dec 10 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 24 | Oct 30 |
| 32°F (freeze) | Mar 26 | Nov 17 |
| 28°F (hard freeze) | Feb 22 | Dec 7 |
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 97060
Dates count from your average last spring frost (Mar 26) and first fall frost (Nov 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 | Jan 29–Feb 12 | Apr 2–16 (transplant) | Jul 21–Aug 18 (transplant) |
| Pepper (sweet and hot) | Jan 15–29 | Apr 9–23 (transplant) | Jul 28–Aug 18 (transplant) |
| Eggplant | Jan 15–29 | Apr 9–23 (transplant) | Jul 28–Aug 18 (transplant) |
| Tomatillo | Jan 29–Feb 12 | Apr 2–16 (transplant) | – |
| Lettuce | Jan 29–Feb 12 | Mar 5–26 (transplant) Feb 26–Apr 9 (sow outdoors) | Sep 22–Oct 13 (transplant) Sep 8–Oct 6 (sowing) |
| Spinach | – | Feb 12–Mar 5 (sow outdoors) | Sep 22–Oct 13 (sowing) |
| Kale | Jan 29–Feb 12 | Feb 26–Mar 12 (transplant) Feb 26–Mar 12 (sow outdoors) | Aug 25–Sep 22 (transplant) Aug 11–Sep 8 (sowing) |
| Collards | Jan 29–Feb 12 | Feb 26–Mar 26 (transplant) Feb 26–Mar 26 (sow outdoors) | Aug 25–Sep 22 (transplant) Aug 11–Sep 8 (sowing) |
| Broccoli | Jan 15–29 | Feb 26–Mar 12 (transplant) | Aug 11–Sep 8 (transplant) |
| Cabbage | Jan 15–29 | Feb 26–Mar 12 (transplant) | Aug 11–Sep 8 (transplant) |
| Cauliflower | Jan 15–29 | Mar 12–26 (transplant) | Aug 11–Sep 8 (transplant) |
| Brussels sprouts | Jan 1–15 | Feb 26–Mar 12 (transplant) | Jul 28–Aug 18 (transplant) |
| Kohlrabi | Jan 29–Feb 12 | Feb 26–Mar 12 (transplant) Feb 26–Mar 12 (sow outdoors) | Sep 8–22 (sowing) |
| Bok choy / Asian greens | – | Feb 26–Mar 12 (sow outdoors) | Sep 22–Oct 6 (sowing) |
| Arugula | – | Feb 26–Mar 26 (sow outdoors) | Sep 22–Oct 20 (sowing) |
| Mustard greens | – | Feb 26–Mar 19 (sow outdoors) | Sep 22–Oct 6 (sowing) |
| Swiss chard | Feb 12–26 | Mar 12–Apr 2 (transplant) Mar 12–Apr 9 (sow outdoors) | Sep 8–22 (sowing) |
| Beet | – | Feb 26–Mar 26 (sow outdoors) | Sep 8–22 (sowing) |
| Carrot | – | Mar 5–Apr 2 (sow outdoors) | Aug 25–Sep 8 (sowing) |
| Radish | – | Feb 19–Apr 2 (sow outdoors) | Oct 6–20 (sowing) |
| Turnip | – | Feb 26–Mar 19 (sow outdoors) | Sep 8–22 (sowing) |
| Parsnip | – | Mar 5–26 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Jan 29–Feb 26 (sow outdoors) | Aug 25–Sep 8 (sowing) |
| Onion (bulbing) | Jan 1–15 | Feb 12–26 (transplant) | – |
| Green onion / scallion | – | Feb 12–Mar 12 (sow outdoors) | Sep 8–22 (sowing) |
| Leek | Jan 1–15 | Feb 26–Mar 12 (transplant) | – |
| Garlic | – | – | Oct 6–Nov 3 (sowing) |
| Shallot | – | Feb 12–26 (transplant) | Oct 6–Nov 3 (sowing) |
| Potato | – | Feb 26–Mar 12 (transplant) | Jul 28–Aug 11 (transplant) |
| Sweet potato | – | Apr 16–30 (transplant) | – |
| Sweet corn | – | Apr 2–16 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 2–16 (sow outdoors) | Aug 25–Sep 8 (sowing) |
| Bean, pole | – | Apr 2–16 (sow outdoors) | – |
| Lima bean | – | Apr 9–23 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 16–May 7 (sow outdoors) | – |
| Cucumber | Feb 26–Mar 5 | Apr 2–16 (transplant) Apr 2–16 (sow outdoors) | Aug 25–Sep 8 (sowing) |
| Summer squash / zucchini | Feb 26–Mar 5 | Apr 2–16 (transplant) Apr 2–16 (sow outdoors) | Aug 25–Sep 8 (sowing) |
| Winter squash | Feb 26–Mar 5 | Apr 2–16 (transplant) Apr 2–16 (sow outdoors) | – |
| Pumpkin | – | Apr 2–16 (sow outdoors) | – |
| Watermelon | Feb 26–Mar 5 | Apr 9–23 (transplant) Apr 9–23 (sow outdoors) | – |
| Cantaloupe / muskmelon | Feb 26–Mar 5 | Apr 9–23 (transplant) Apr 9–23 (sow outdoors) | – |
| Okra | Feb 12–26 | Apr 9–23 (transplant) Apr 9–23 (sow outdoors) | – |
| Celery | Jan 1–15 | Apr 2–9 (transplant) | – |
| Basil | Feb 12–26 | Apr 2–16 (transplant) Apr 2–16 (sow outdoors) | – |
| Cilantro | – | Mar 12–Apr 9 (sow outdoors) | Sep 22–Oct 6 (sowing) |
| Parsley | Jan 15–29 | Mar 12–26 (transplant) Mar 5–26 (sow outdoors) | – |
| Dill | – | Mar 26–Apr 9 (sow outdoors) | Sep 22–Oct 6 (sowing) |
| Sunflower | – | Mar 26–Apr 9 (sow outdoors) | – |
| Asparagus (crowns) | – | Feb 26–Mar 12 (transplant) | – |
| Rhubarb (crowns) | – | Feb 26–Mar 12 (transplant) | – |
| Strawberry (plants) | – | Feb 26–Mar 12 (transplant) | Sep 8–Oct 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: Troutdale, OR (NOAA GHCN-Daily ID USC00358634), elevation 33 ft, 1.8 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Portland Troutdale AP, OR | 2 mi | Mar 16 | Nov 20 |
| Portland WFO, OR | 8 mi | Mar 13 | Nov 22 |
| Skamania Fish Hatchery, WA | 10 mi | Apr 29 | Oct 22 |
The average last-frost dates of these stations span 47 days, a rough guide to local variation. See data sources & methods.
Frost questions for 97060
When is the last frost in 97060?
The average (50% chance) last spring freeze of 32°F for ZIP 97060 is March 26. For a more cautious planting date, use April 21, when only 1 year in 10 still sees a later freeze.
When is the first frost in 97060?
The average first fall freeze is November 17. In 1 year in 10 it comes by October 26.
What hardiness zone is 97060?
ZIP 97060 is in USDA zone 9a (20 to 25°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 97060 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
97030 Gresham 97024 Fairview 97080 Gresham 97233 Portland 97230 Portland 98671 Washougal 97009 Boring 98607 Camas
Other ZIP codes in Multnomah County
97019 97024 97030 97080 97201 97202 97203 97204 97205 97206 97208 97209 97210 97211 97212 97213 97214 97215 97216 97217 97218 97219 97220 97221 All Multnomah County frost dates · Oregon 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.