Frost dates for ZIP 97498 (San Marine, 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, Yachats, OR (6 miles away).
- Average last spring frostFeb 1950% chance of a 32°F freeze after this date
- Average first fall frostDec 1150% chance of a 32°F freeze by this date
- Growing season (frost-free)303 daysmedian, 32°F threshold
- USDA hardiness zone9a20 to 25°F avg. coldest night
Get The Dial for 97498 (San Marine)
Frost and freeze alerts from the NWS forecast for 97498, the spring soil-temperature heads-up for pre-emergent, and a short weekly yard-timing email.
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.
This week in your yard
As of Oct 17, 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 60°F, as of Oct 17, 9:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Corvallis 10 SSW (35 mi).
4-inch depth
58°F 55°F or warmer
24-hour average · latest 60°F, as of Oct 17, 9:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Corvallis 10 SSW (35 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 97498 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 sowing Oct 2–30
- Lettuce: fall transplant Oct 16–Nov 6
- Spinach: fall sowing Oct 16–Nov 6
- Bok choy / Asian greens: fall sowing Oct 16–30
- Arugula: fall sowing Oct 16–Nov 13
- Mustard greens: fall sowing Oct 16–30
- Cilantro: fall sowing Oct 16–30
- Dill: fall sowing Oct 16–30
- Strawberry (plants): fall transplant Oct 2–30
Coming up in the next 3 weeks
- Radish: fall sowing Oct 30–Nov 13
- Garlic: fall sowing Oct 30–Nov 27
- Shallot: fall sowing Oct 30–Nov 27
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Dec 11: 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) | Dec 18 (prior Dec) |
| 50% (the "average" last frost) | Feb 19 |
| 10% (cautious: only 1 year in 10 freezes later) | Mar 23 |
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 12 |
| 50% (the "average" first frost) | Dec 11 |
| 90% (late: most years have frozen by now) | Feb 13 (next year) |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 4 | Nov 18 |
| 32°F (freeze) | Feb 19 | Dec 11 |
| 28°F (hard freeze) | Jan 9 | Dec 24 |
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 97498
Dates count from your average last spring frost (Feb 19) and first fall frost (Dec 11). 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 | Dec 25–Jan 8 | Feb 26–Mar 12 (transplant) | Aug 14–Sep 11 (transplant) |
| Pepper (sweet and hot) | Dec 11–25 | Mar 5–19 (transplant) | Aug 21–Sep 11 (transplant) |
| Eggplant | Dec 11–25 | Mar 5–19 (transplant) | Aug 21–Sep 11 (transplant) |
| Tomatillo | Dec 25–Jan 8 | Feb 26–Mar 12 (transplant) | – |
| Lettuce | Dec 25–Jan 8 | Jan 29–Feb 19 (transplant) Jan 22–Mar 5 (sow outdoors) | Oct 16–Nov 6 (transplant) Oct 2–30 (sowing) |
| Spinach | – | Jan 8–29 (sow outdoors) | Oct 16–Nov 6 (sowing) |
| Kale | Dec 25–Jan 8 | Jan 22–Feb 5 (transplant) Jan 22–Feb 5 (sow outdoors) | Sep 18–Oct 16 (transplant) Sep 4–Oct 2 (sowing) |
| Collards | Dec 25–Jan 8 | Jan 22–Feb 19 (transplant) Jan 22–Feb 19 (sow outdoors) | Sep 18–Oct 16 (transplant) Sep 4–Oct 2 (sowing) |
| Broccoli | Dec 11–25 | Jan 22–Feb 5 (transplant) | Sep 4–Oct 2 (transplant) |
| Cabbage | Dec 11–25 | Jan 22–Feb 5 (transplant) | Sep 4–Oct 2 (transplant) |
| Cauliflower | Dec 11–25 | Feb 5–19 (transplant) | Sep 4–Oct 2 (transplant) |
| Brussels sprouts | Nov 27–Dec 11 | Jan 22–Feb 5 (transplant) | Aug 21–Sep 11 (transplant) |
| Kohlrabi | Dec 25–Jan 8 | Jan 22–Feb 5 (transplant) Jan 22–Feb 5 (sow outdoors) | Oct 2–16 (sowing) |
| Bok choy / Asian greens | – | Jan 22–Feb 5 (sow outdoors) | Oct 16–30 (sowing) |
| Arugula | – | Jan 22–Feb 19 (sow outdoors) | Oct 16–Nov 13 (sowing) |
| Mustard greens | – | Jan 22–Feb 12 (sow outdoors) | Oct 16–30 (sowing) |
| Swiss chard | Jan 8–22 | Feb 5–26 (transplant) Feb 5–Mar 5 (sow outdoors) | Oct 2–16 (sowing) |
| Beet | – | Jan 22–Feb 19 (sow outdoors) | Oct 2–16 (sowing) |
| Carrot | – | Jan 29–Feb 26 (sow outdoors) | Sep 18–Oct 2 (sowing) |
| Radish | – | Jan 15–Feb 26 (sow outdoors) | Oct 30–Nov 13 (sowing) |
| Turnip | – | Jan 22–Feb 12 (sow outdoors) | Oct 2–16 (sowing) |
| Parsnip | – | Jan 29–Feb 19 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Dec 25–Jan 22 (sow outdoors) | Sep 18–Oct 2 (sowing) |
| Onion (bulbing) | Nov 27–Dec 11 | Jan 8–22 (transplant) | – |
| Green onion / scallion | – | Jan 8–Feb 5 (sow outdoors) | Oct 2–16 (sowing) |
| Leek | Nov 27–Dec 11 | Jan 22–Feb 5 (transplant) | – |
| Garlic | – | – | Oct 30–Nov 27 (sowing) |
| Shallot | – | Jan 8–22 (transplant) | Oct 30–Nov 27 (sowing) |
| Potato | – | Jan 22–Feb 5 (transplant) | Aug 21–Sep 4 (transplant) |
| Sweet potato | – | Mar 12–26 (transplant) | – |
| Sweet corn | – | Feb 26–Mar 12 (sow outdoors) | – |
| Bean, bush (snap) | – | Feb 26–Mar 12 (sow outdoors) | Sep 18–Oct 2 (sowing) |
| Bean, pole | – | Feb 26–Mar 12 (sow outdoors) | – |
| Lima bean | – | Mar 5–19 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Mar 12–Apr 2 (sow outdoors) | – |
| Cucumber | Jan 22–29 | Feb 26–Mar 12 (transplant) Feb 26–Mar 12 (sow outdoors) | Sep 18–Oct 2 (sowing) |
| Summer squash / zucchini | Jan 22–29 | Feb 26–Mar 12 (transplant) Feb 26–Mar 12 (sow outdoors) | Sep 18–Oct 2 (sowing) |
| Winter squash | Jan 22–29 | Feb 26–Mar 12 (transplant) Feb 26–Mar 12 (sow outdoors) | – |
| Pumpkin | – | Feb 26–Mar 12 (sow outdoors) | – |
| Watermelon | Jan 22–29 | Mar 5–19 (transplant) Mar 5–19 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 22–29 | Mar 5–19 (transplant) Mar 5–19 (sow outdoors) | – |
| Okra | Jan 8–22 | Mar 5–19 (transplant) Mar 5–19 (sow outdoors) | – |
| Celery | Nov 27–Dec 11 | Feb 26–Mar 5 (transplant) | – |
| Basil | Jan 8–22 | Feb 26–Mar 12 (transplant) Feb 26–Mar 12 (sow outdoors) | – |
| Cilantro | – | Feb 5–Mar 5 (sow outdoors) | Oct 16–30 (sowing) |
| Parsley | Dec 11–25 | Feb 5–19 (transplant) Jan 29–Feb 19 (sow outdoors) | – |
| Dill | – | Feb 19–Mar 5 (sow outdoors) | Oct 16–30 (sowing) |
| Sunflower | – | Feb 19–Mar 5 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 22–Feb 5 (transplant) | – |
| Rhubarb (crowns) | – | Jan 22–Feb 5 (transplant) | – |
| Strawberry (plants) | – | Jan 22–Feb 5 (transplant) | Oct 2–30 (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: Yachats, OR (NOAA GHCN-Daily ID USC00359588), elevation 50 ft, 5.9 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Alsea Fh (fall Creek), OR | 16 mi | Apr 13 | Nov 3 |
| Mapleton, OR | 18 mi | Feb 15 | Dec 9 |
| Florence #2, OR | 19 mi | Apr 10 | Nov 15 |
The average last-frost dates of these stations span 60 days, a rough guide to local variation. See data sources & methods.
Frost questions for 97498
When is the last frost in 97498?
The average (50% chance) last spring freeze of 32°F for ZIP 97498 is February 19. For a more cautious planting date, use March 23, when only 1 year in 10 still sees a later freeze.
When is the first frost in 97498?
The average first fall freeze is December 11. In 1 year in 10 it comes by November 12.
What hardiness zone is 97498?
ZIP 97498 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 97498 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
97394 Waldport 97390 97480 97439 Florence 97376 97430 97324 Alsea 97366 Newport
Other ZIP codes in Lane County
97401 97402 97403 97404 97405 97408 97412 97413 97419 97424 97426 97430 97431 97434 97437 97438 97439 97448 97451 97452 97453 97454 97455 97461 All Lane County frost dates · Oregon frost dates
Never miss a frost: get The Dial
Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
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.