Fall in zone 9aPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 97423 (Coquille, 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, Coquille City, OR (1 miles away).
- Average last spring frostMar 2850% chance of a 32°F freeze after this date
- Average first fall frostNov 650% chance of a 32°F freeze by this date
- Growing season (frost-free)225 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
53°F 50–55°F
24-hour average · latest 54°F, as of Oct 18, 1:00 AM CDT
Measured at NOAA USCRN station Coos Bay 8 SW, 9 mi away. Daily averages: Thu 51°, Fri 51°, Sat 53°.
4-inch depth
54°F 50–55°F
24-hour average · latest 54°F, as of Oct 18, 1:00 AM CDT
Measured at NOAA USCRN station Coos Bay 8 SW, 9 mi away. Daily averages: Thu 53°, Fri 53°, Sat 54°.
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 97423 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 54°F at 4 inches. Fall pre-emergent window is mostly past. Next: spring, when soil reaches 50°F (typically 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
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 6: 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 22 |
| 50% (the "average" last frost) | Mar 28 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 27 |
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 17 |
| 50% (the "average" first frost) | Nov 6 |
| 90% (late: most years have frozen by now) | Dec 6 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 30 | Oct 18 |
| 32°F (freeze) | Mar 28 | Nov 6 |
| 28°F (hard freeze) | Feb 16 | Dec 2 |
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 97423
Dates count from your average last spring frost (Mar 28) and first fall frost (Nov 6). 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 31–Feb 14 | Apr 4–18 (transplant) | Jul 10–Aug 7 (transplant) |
| Pepper (sweet and hot) | Jan 17–31 | Apr 11–25 (transplant) | Jul 17–Aug 7 (transplant) |
| Eggplant | Jan 17–31 | Apr 11–25 (transplant) | Jul 17–Aug 7 (transplant) |
| Tomatillo | Jan 31–Feb 14 | Apr 4–18 (transplant) | – |
| Lettuce | Jan 31–Feb 14 | Mar 7–28 (transplant) Feb 28–Apr 11 (sow outdoors) | Sep 11–Oct 2 (transplant) Aug 28–Sep 25 (sowing) |
| Spinach | – | Feb 14–Mar 7 (sow outdoors) | Sep 11–Oct 2 (sowing) |
| Kale | Jan 31–Feb 14 | Feb 28–Mar 14 (transplant) Feb 28–Mar 14 (sow outdoors) | Aug 14–Sep 11 (transplant) Jul 31–Aug 28 (sowing) |
| Collards | Jan 31–Feb 14 | Feb 28–Mar 28 (transplant) Feb 28–Mar 28 (sow outdoors) | Aug 14–Sep 11 (transplant) Jul 31–Aug 28 (sowing) |
| Broccoli | Jan 17–31 | Feb 28–Mar 14 (transplant) | Jul 31–Aug 28 (transplant) |
| Cabbage | Jan 17–31 | Feb 28–Mar 14 (transplant) | Jul 31–Aug 28 (transplant) |
| Cauliflower | Jan 17–31 | Mar 14–28 (transplant) | Jul 31–Aug 28 (transplant) |
| Brussels sprouts | Jan 3–17 | Feb 28–Mar 14 (transplant) | Jul 17–Aug 7 (transplant) |
| Kohlrabi | Jan 31–Feb 14 | Feb 28–Mar 14 (transplant) Feb 28–Mar 14 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Bok choy / Asian greens | – | Feb 28–Mar 14 (sow outdoors) | Sep 11–25 (sowing) |
| Arugula | – | Feb 28–Mar 28 (sow outdoors) | Sep 11–Oct 9 (sowing) |
| Mustard greens | – | Feb 28–Mar 21 (sow outdoors) | Sep 11–25 (sowing) |
| Swiss chard | Feb 14–28 | Mar 14–Apr 4 (transplant) Mar 14–Apr 11 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Beet | – | Feb 28–Mar 28 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Carrot | – | Mar 7–Apr 4 (sow outdoors) | Aug 14–28 (sowing) |
| Radish | – | Feb 21–Apr 4 (sow outdoors) | Sep 25–Oct 9 (sowing) |
| Turnip | – | Feb 28–Mar 21 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Parsnip | – | Mar 7–28 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Jan 31–Feb 28 (sow outdoors) | Aug 14–28 (sowing) |
| Onion (bulbing) | Jan 3–17 | Feb 14–28 (transplant) | – |
| Green onion / scallion | – | Feb 14–Mar 14 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Leek | Jan 3–17 | Feb 28–Mar 14 (transplant) | – |
| Garlic | – | – | Sep 25–Oct 23 (sowing) |
| Shallot | – | Feb 14–28 (transplant) | Sep 25–Oct 23 (sowing) |
| Potato | – | Feb 28–Mar 14 (transplant) | Jul 17–31 (transplant) |
| Sweet potato | – | Apr 18–May 2 (transplant) | – |
| Sweet corn | – | Apr 4–18 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 4–18 (sow outdoors) | Aug 14–28 (sowing) |
| Bean, pole | – | Apr 4–18 (sow outdoors) | – |
| Lima bean | – | Apr 11–25 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 18–May 9 (sow outdoors) | – |
| Cucumber | Feb 28–Mar 7 | Apr 4–18 (transplant) Apr 4–18 (sow outdoors) | Aug 14–28 (sowing) |
| Summer squash / zucchini | Feb 28–Mar 7 | Apr 4–18 (transplant) Apr 4–18 (sow outdoors) | Aug 14–28 (sowing) |
| Winter squash | Feb 28–Mar 7 | Apr 4–18 (transplant) Apr 4–18 (sow outdoors) | – |
| Pumpkin | – | Apr 4–18 (sow outdoors) | – |
| Watermelon | Feb 28–Mar 7 | Apr 11–25 (transplant) Apr 11–25 (sow outdoors) | – |
| Cantaloupe / muskmelon | Feb 28–Mar 7 | Apr 11–25 (transplant) Apr 11–25 (sow outdoors) | – |
| Okra | Feb 14–28 | Apr 11–25 (transplant) Apr 11–25 (sow outdoors) | – |
| Celery | Jan 3–17 | Apr 4–11 (transplant) | – |
| Basil | Feb 14–28 | Apr 4–18 (transplant) Apr 4–18 (sow outdoors) | – |
| Cilantro | – | Mar 14–Apr 11 (sow outdoors) | Sep 11–25 (sowing) |
| Parsley | Jan 17–31 | Mar 14–28 (transplant) Mar 7–28 (sow outdoors) | – |
| Dill | – | Mar 28–Apr 11 (sow outdoors) | Sep 11–25 (sowing) |
| Sunflower | – | Mar 28–Apr 11 (sow outdoors) | – |
| Asparagus (crowns) | – | Feb 28–Mar 14 (transplant) | – |
| Rhubarb (crowns) | – | Feb 28–Mar 14 (transplant) | – |
| Strawberry (plants) | – | Feb 28–Mar 14 (transplant) | Aug 28–Sep 25 (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: Coquille City, OR (NOAA GHCN-Daily ID USC00351836), elevation 23 ft, 1.4 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Coos Bay 8 SW, OR | 9 mi | Apr 15 | Oct 31 |
| Bandon 2 NNE, OR | 12 mi | Mar 9 | Nov 27 |
| North Bend Rgnl AP, OR | 16 mi | Feb 21 | Dec 9 |
The average last-frost dates of these stations span 56 days, a rough guide to local variation. See data sources & methods.
Frost questions for 97423
When is the last frost in 97423?
The average (50% chance) last spring freeze of 32°F for ZIP 97423 is March 28. For a more cautious planting date, use April 27, when only 1 year in 10 still sees a later freeze.
When is the first frost in 97423?
The average first fall freeze is November 6. In 1 year in 10 it comes by October 17.
What hardiness zone is 97423?
ZIP 97423 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 97423 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
97420 Coos Bay 97411 Bandon 97458 Myrtle Point 97414 97459 North Bend 97450 Langlois 97466 Powers 97416
Other ZIP codes in Coos County
97411 97414 97420 97449 97458 97459 97466 All Coos 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.