Frost dates for ZIP 97532 (Merlin, 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, Sexton Summit, OR (16 miles away).
- Average last spring frostMay 1650% chance of a 32°F freeze after this date
- Average first fall frostOct 3050% chance of a 32°F freeze by this date
- Growing season (frost-free)164 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 17, 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 17, 9:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Coos Bay 8 SW (62 mi).
4-inch depth
54°F 50–55°F
24-hour average · latest 54°F, as of Oct 17, 9:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Coos Bay 8 SW (62 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 97532 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 54°F at 4 inches (estimated soil temperature, not a station reading). 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
No vegetable planting windows are open this week.
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Oct 30: 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) | Apr 23 |
| 50% (the "average" last frost) | May 16 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 7 |
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 8 |
| 50% (the "average" first frost) | Oct 30 |
| 90% (late: most years have frozen by now) | Nov 17 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Jun 7 | Oct 9 |
| 32°F (freeze) | May 16 | Oct 30 |
| 28°F (hard freeze) | Apr 23 | Nov 17 |
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 97532
Dates count from your average last spring frost (May 16) and first fall frost (Oct 30). 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 | Mar 21–Apr 4 | May 23–Jun 6 (transplant) | – |
| Pepper (sweet and hot) | Mar 7–21 | May 30–Jun 13 (transplant) | – |
| Eggplant | Mar 7–21 | May 30–Jun 13 (transplant) | – |
| Tomatillo | Mar 21–Apr 4 | May 23–Jun 6 (transplant) | – |
| Lettuce | Mar 21–Apr 4 | Apr 25–May 16 (transplant) Apr 18–May 30 (sow outdoors) | Sep 4–25 (transplant) Aug 21–Sep 18 (sowing) |
| Spinach | – | Apr 4–25 (sow outdoors) | Sep 4–25 (sowing) |
| Kale | Mar 21–Apr 4 | Apr 18–May 2 (transplant) Apr 18–May 2 (sow outdoors) | Aug 7–Sep 4 (transplant) Jul 24–Aug 21 (sowing) |
| Collards | Mar 21–Apr 4 | Apr 18–May 16 (transplant) Apr 18–May 16 (sow outdoors) | Aug 7–Sep 4 (transplant) Jul 24–Aug 21 (sowing) |
| Broccoli | Mar 7–21 | Apr 18–May 2 (transplant) | Jul 24–Aug 21 (transplant) |
| Cabbage | Mar 7–21 | Apr 18–May 2 (transplant) | Jul 24–Aug 21 (transplant) |
| Cauliflower | Mar 7–21 | May 2–16 (transplant) | Jul 24–Aug 21 (transplant) |
| Brussels sprouts | Feb 21–Mar 7 | Apr 18–May 2 (transplant) | Jul 10–31 (transplant) |
| Kohlrabi | Mar 21–Apr 4 | Apr 18–May 2 (transplant) Apr 18–May 2 (sow outdoors) | Aug 21–Sep 4 (sowing) |
| Bok choy / Asian greens | – | Apr 18–May 2 (sow outdoors) | Sep 4–18 (sowing) |
| Arugula | – | Apr 18–May 16 (sow outdoors) | Sep 4–Oct 2 (sowing) |
| Mustard greens | – | Apr 18–May 9 (sow outdoors) | Sep 4–18 (sowing) |
| Swiss chard | Apr 4–18 | May 2–23 (transplant) May 2–30 (sow outdoors) | Aug 21–Sep 4 (sowing) |
| Beet | – | Apr 18–May 16 (sow outdoors) | Aug 21–Sep 4 (sowing) |
| Carrot | – | Apr 25–May 23 (sow outdoors) | Aug 7–21 (sowing) |
| Radish | – | Apr 11–May 23 (sow outdoors) | Sep 18–Oct 2 (sowing) |
| Turnip | – | Apr 18–May 9 (sow outdoors) | Aug 21–Sep 4 (sowing) |
| Parsnip | – | Apr 25–May 16 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Mar 21–Apr 18 (sow outdoors) | Aug 7–21 (sowing) |
| Onion (bulbing) | Feb 21–Mar 7 | Apr 4–18 (transplant) | – |
| Green onion / scallion | – | Apr 4–May 2 (sow outdoors) | Aug 21–Sep 4 (sowing) |
| Leek | Feb 21–Mar 7 | Apr 18–May 2 (transplant) | – |
| Garlic | – | – | Sep 18–Oct 16 (sowing) |
| Shallot | – | Apr 4–18 (transplant) | Sep 18–Oct 16 (sowing) |
| Potato | – | Apr 18–May 2 (transplant) | Jul 10–24 (transplant) |
| Sweet potato | – | Jun 6–20 (transplant) | – |
| Sweet corn | – | May 23–Jun 6 (sow outdoors) | – |
| Bean, bush (snap) | – | May 23–Jun 6 (sow outdoors) | – |
| Bean, pole | – | May 23–Jun 6 (sow outdoors) | – |
| Lima bean | – | May 30–Jun 13 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 6–27 (sow outdoors) | – |
| Cucumber | Apr 18–25 | May 23–Jun 6 (transplant) May 23–Jun 6 (sow outdoors) | – |
| Summer squash / zucchini | Apr 18–25 | May 23–Jun 6 (transplant) May 23–Jun 6 (sow outdoors) | – |
| Winter squash | Apr 18–25 | May 23–Jun 6 (transplant) May 23–Jun 6 (sow outdoors) | – |
| Pumpkin | – | May 23–Jun 6 (sow outdoors) | – |
| Watermelon | Apr 18–25 | May 30–Jun 13 (transplant) May 30–Jun 13 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 18–25 | May 30–Jun 13 (transplant) May 30–Jun 13 (sow outdoors) | – |
| Okra | Apr 4–18 | May 30–Jun 13 (transplant) May 30–Jun 13 (sow outdoors) | – |
| Celery | Feb 21–Mar 7 | May 23–30 (transplant) | – |
| Basil | Apr 4–18 | May 23–Jun 6 (transplant) May 23–Jun 6 (sow outdoors) | – |
| Cilantro | – | May 2–30 (sow outdoors) | Sep 4–18 (sowing) |
| Parsley | Mar 7–21 | May 2–16 (transplant) Apr 25–May 16 (sow outdoors) | – |
| Dill | – | May 16–30 (sow outdoors) | Sep 4–18 (sowing) |
| Sunflower | – | May 16–30 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 18–May 2 (transplant) | – |
| Rhubarb (crowns) | – | Apr 18–May 2 (transplant) | – |
| Strawberry (plants) | – | Apr 18–May 2 (transplant) | Aug 21–Sep 18 (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: Sexton Summit, OR (NOAA GHCN-Daily ID USW00024235), elevation 3,832 ft, 15.9 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Grants Pass, OR | 18 mi | Apr 8 | Oct 28 |
| Illahe, OR | 22 mi | Mar 30 | Nov 17 |
| Cave Junction 1 WNW, OR | 25 mi | May 1 | Oct 12 |
The average last-frost dates of these stations span 48 days, a rough guide to local variation. See data sources & methods.
Frost questions for 97532
When is the last frost in 97532?
The average (50% chance) last spring freeze of 32°F for ZIP 97532 is May 16. For a more cautious planting date, use June 7, when only 1 year in 10 still sees a later freeze.
When is the first frost in 97532?
The average first fall freeze is October 30. In 1 year in 10 it comes by October 8.
What hardiness zone is 97532?
ZIP 97532 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 97532 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
97543 97538 Selma 97497 97526 Grants Pass 97527 New Hope 97406 97531 Kerby 97442 Glendale
Other ZIP codes in Josephine County
97497 97523 97526 97527 97531 97534 97538 97543 97544 All Josephine County frost dates · Oregon frost dates
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