Fall in zone 8bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 97360 (Mill City, 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, Detroit Dam, OR (11 miles away).
- Average last spring frostMar 950% chance of a 32°F freeze after this date
- Average first fall frostDec 350% chance of a 32°F freeze by this date
- Growing season (frost-free)270 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 (48 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 (48 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 97360 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 Sep 24–Oct 22
- Lettuce: fall transplant Oct 8–29
- Spinach: fall sowing Oct 8–29
- Bok choy / Asian greens: fall sowing Oct 8–22
- Arugula: fall sowing Oct 8–Nov 5
- Mustard greens: fall sowing Oct 8–22
- Cilantro: fall sowing Oct 8–22
- Dill: fall sowing Oct 8–22
- Strawberry (plants): fall transplant Sep 24–Oct 22
Coming up in the next 3 weeks
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Dec 3: 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 2 |
| 50% (the "average" last frost) | Mar 9 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 8 |
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 8 |
| 50% (the "average" first frost) | Dec 3 |
| 90% (late: most years have frozen by now) | Jan 4 (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 17 | Nov 11 |
| 32°F (freeze) | Mar 9 | Dec 3 |
| 28°F (hard freeze) | Feb 5 | Dec 26 |
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 97360
Dates count from your average last spring frost (Mar 9) and first fall frost (Dec 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 | Jan 12–26 | Mar 16–30 (transplant) | Aug 6–Sep 3 (transplant) |
| Pepper (sweet and hot) | Dec 29–Jan 12 | Mar 23–Apr 6 (transplant) | Aug 13–Sep 3 (transplant) |
| Eggplant | Dec 29–Jan 12 | Mar 23–Apr 6 (transplant) | Aug 13–Sep 3 (transplant) |
| Tomatillo | Jan 12–26 | Mar 16–30 (transplant) | – |
| Lettuce | Jan 12–26 | Feb 16–Mar 9 (transplant) Feb 9–Mar 23 (sow outdoors) | Oct 8–29 (transplant) Sep 24–Oct 22 (sowing) |
| Spinach | – | Jan 26–Feb 16 (sow outdoors) | Oct 8–29 (sowing) |
| Kale | Jan 12–26 | Feb 9–23 (transplant) Feb 9–23 (sow outdoors) | Sep 10–Oct 8 (transplant) Aug 27–Sep 24 (sowing) |
| Collards | Jan 12–26 | Feb 9–Mar 9 (transplant) Feb 9–Mar 9 (sow outdoors) | Sep 10–Oct 8 (transplant) Aug 27–Sep 24 (sowing) |
| Broccoli | Dec 29–Jan 12 | Feb 9–23 (transplant) | Aug 27–Sep 24 (transplant) |
| Cabbage | Dec 29–Jan 12 | Feb 9–23 (transplant) | Aug 27–Sep 24 (transplant) |
| Cauliflower | Dec 29–Jan 12 | Feb 23–Mar 9 (transplant) | Aug 27–Sep 24 (transplant) |
| Brussels sprouts | Dec 15–29 | Feb 9–23 (transplant) | Aug 13–Sep 3 (transplant) |
| Kohlrabi | Jan 12–26 | Feb 9–23 (transplant) Feb 9–23 (sow outdoors) | Sep 24–Oct 8 (sowing) |
| Bok choy / Asian greens | – | Feb 9–23 (sow outdoors) | Oct 8–22 (sowing) |
| Arugula | – | Feb 9–Mar 9 (sow outdoors) | Oct 8–Nov 5 (sowing) |
| Mustard greens | – | Feb 9–Mar 2 (sow outdoors) | Oct 8–22 (sowing) |
| Swiss chard | Jan 26–Feb 9 | Feb 23–Mar 16 (transplant) Feb 23–Mar 23 (sow outdoors) | Sep 24–Oct 8 (sowing) |
| Beet | – | Feb 9–Mar 9 (sow outdoors) | Sep 24–Oct 8 (sowing) |
| Carrot | – | Feb 16–Mar 16 (sow outdoors) | Sep 10–24 (sowing) |
| Radish | – | Feb 2–Mar 16 (sow outdoors) | Oct 22–Nov 5 (sowing) |
| Turnip | – | Feb 9–Mar 2 (sow outdoors) | Sep 24–Oct 8 (sowing) |
| Parsnip | – | Feb 16–Mar 9 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Jan 12–Feb 9 (sow outdoors) | Sep 10–24 (sowing) |
| Onion (bulbing) | Dec 15–29 | Jan 26–Feb 9 (transplant) | – |
| Green onion / scallion | – | Jan 26–Feb 23 (sow outdoors) | Sep 24–Oct 8 (sowing) |
| Leek | Dec 15–29 | Feb 9–23 (transplant) | – |
| Garlic | – | – | Oct 22–Nov 19 (sowing) |
| Shallot | – | Jan 26–Feb 9 (transplant) | Oct 22–Nov 19 (sowing) |
| Potato | – | Feb 9–23 (transplant) | Aug 13–27 (transplant) |
| Sweet potato | – | Mar 30–Apr 13 (transplant) | – |
| Sweet corn | – | Mar 16–30 (sow outdoors) | – |
| Bean, bush (snap) | – | Mar 16–30 (sow outdoors) | Sep 10–24 (sowing) |
| Bean, pole | – | Mar 16–30 (sow outdoors) | – |
| Lima bean | – | Mar 23–Apr 6 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Mar 30–Apr 20 (sow outdoors) | – |
| Cucumber | Feb 9–16 | Mar 16–30 (transplant) Mar 16–30 (sow outdoors) | Sep 10–24 (sowing) |
| Summer squash / zucchini | Feb 9–16 | Mar 16–30 (transplant) Mar 16–30 (sow outdoors) | Sep 10–24 (sowing) |
| Winter squash | Feb 9–16 | Mar 16–30 (transplant) Mar 16–30 (sow outdoors) | – |
| Pumpkin | – | Mar 16–30 (sow outdoors) | – |
| Watermelon | Feb 9–16 | Mar 23–Apr 6 (transplant) Mar 23–Apr 6 (sow outdoors) | – |
| Cantaloupe / muskmelon | Feb 9–16 | Mar 23–Apr 6 (transplant) Mar 23–Apr 6 (sow outdoors) | – |
| Okra | Jan 26–Feb 9 | Mar 23–Apr 6 (transplant) Mar 23–Apr 6 (sow outdoors) | – |
| Celery | Dec 15–29 | Mar 16–23 (transplant) | – |
| Basil | Jan 26–Feb 9 | Mar 16–30 (transplant) Mar 16–30 (sow outdoors) | – |
| Cilantro | – | Feb 23–Mar 23 (sow outdoors) | Oct 8–22 (sowing) |
| Parsley | Dec 29–Jan 12 | Feb 23–Mar 9 (transplant) Feb 16–Mar 9 (sow outdoors) | – |
| Dill | – | Mar 9–23 (sow outdoors) | Oct 8–22 (sowing) |
| Sunflower | – | Mar 9–23 (sow outdoors) | – |
| Asparagus (crowns) | – | Feb 9–23 (transplant) | – |
| Rhubarb (crowns) | – | Feb 9–23 (transplant) | – |
| Strawberry (plants) | – | Feb 9–23 (transplant) | Sep 24–Oct 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: Detroit Dam, OR (NOAA GHCN-Daily ID USC00352292), elevation 1,220 ft, 11.3 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Silver Creek Falls, OR | 12 mi | Apr 30 | Oct 22 |
| Scotts Mills 9 SE, OR | 14 mi | Apr 27 | Nov 4 |
| Lacomb 3 NNE, OR | 14 mi | Apr 26 | Oct 24 |
The average last-frost dates of these stations span 52 days, a rough guide to local variation. See data sources & methods.
Frost questions for 97360
When is the last frost in 97360?
The average (50% chance) last spring freeze of 32°F for ZIP 97360 is March 9. For a more cautious planting date, use April 8, when only 1 year in 10 still sees a later freeze.
When is the first frost in 97360?
The average first fall freeze is December 3. In 1 year in 10 it comes by November 8.
What hardiness zone is 97360?
ZIP 97360 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 97360 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
97346 Gates 97358 Lyons 97384 Mehama 97383 Stayton 97385 Sublimity 97374 Crabtree 97375 Scotts Mills 97381 Silverton
Other ZIP codes in Linn County
97321 97322 97327 97329 97335 97336 97345 97348 97350 97355 97374 97377 97386 97389 97446 97759 All Linn 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.