Frost dates for ZIP 97885 (Wallowa, 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, Wallowa, OR (6 miles away).
- Average last spring frostJun 750% chance of a 32°F freeze after this date
- Average first fall frostSep 950% chance of a 32°F freeze by this date
- Growing season (frost-free)91 daysmedian, 32°F threshold
- USDA hardiness zone6b-5 to 0°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
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 97885 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 mid-April to mid-May.
Fertilizer window
Lawn region: Mountain West and High Plains. Timing only; always follow the product label.
- Kentucky bluegrass (cool-season): Early fall: Around Labor Day (late August–September); Late fall: Late October–November, before the ground freezes; Late spring: Optional around Memorial Day. Avoid: Early-spring and midsummer feeding (pushes top growth, favors crabgrass).
Plant now
No vegetable planting windows are open this week.
Prune now
No frost-timed pruning windows are open this week.
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) | May 14 |
| 50% (the "average" last frost) | Jun 7 |
| 10% (cautious: only 1 year in 10 freezes later) | Jul 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) | Aug 24 |
| 50% (the "average" first frost) | Sep 9 |
| 90% (late: most years have frozen by now) | Sep 27 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | n/a | n/a |
| 32°F (freeze) | Jun 7 | Sep 9 |
| 28°F (hard freeze) | May 11 | Sep 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 97885
Dates count from your average last spring frost (Jun 7) and first fall frost (Sep 9). 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 | Apr 12–26 | Jun 14–28 (transplant) | – |
| Pepper (sweet and hot) | Mar 29–Apr 12 | Jun 21–Jul 5 (transplant) | – |
| Eggplant | Mar 29–Apr 12 | Jun 21–Jul 5 (transplant) | – |
| Tomatillo | Apr 12–26 | Jun 14–28 (transplant) | – |
| Lettuce | Apr 12–26 | May 17–Jun 7 (transplant) May 10–Jun 21 (sow outdoors) | Jul 15–Aug 5 (transplant) Jul 1–29 (sowing) |
| Spinach | – | Apr 26–May 17 (sow outdoors) | Jul 15–Aug 5 (sowing) |
| Kale | Apr 12–26 | May 10–24 (transplant) May 10–24 (sow outdoors) | Jun 17–Jul 15 (transplant) Jun 3–Jul 1 (sowing) |
| Collards | Apr 12–26 | May 10–Jun 7 (transplant) May 10–Jun 7 (sow outdoors) | Jun 17–Jul 15 (transplant) |
| Broccoli | Mar 29–Apr 12 | May 10–24 (transplant) | Jun 3–Jul 1 (transplant) |
| Cabbage | Mar 29–Apr 12 | May 10–24 (transplant) | Jun 3–Jul 1 (transplant) |
| Cauliflower | Mar 29–Apr 12 | May 24–Jun 7 (transplant) | – |
| Brussels sprouts | Mar 15–29 | May 10–24 (transplant) | – |
| Kohlrabi | Apr 12–26 | May 10–24 (transplant) May 10–24 (sow outdoors) | Jul 1–15 (sowing) |
| Bok choy / Asian greens | – | May 10–24 (sow outdoors) | Jul 15–29 (sowing) |
| Arugula | – | May 10–Jun 7 (sow outdoors) | Jul 15–Aug 12 (sowing) |
| Mustard greens | – | May 10–31 (sow outdoors) | Jul 15–29 (sowing) |
| Swiss chard | Apr 26–May 10 | May 24–Jun 14 (transplant) May 24–Jun 21 (sow outdoors) | Jul 1–15 (sowing) |
| Beet | – | May 10–Jun 7 (sow outdoors) | Jul 1–15 (sowing) |
| Carrot | – | May 17–Jun 14 (sow outdoors) | Jun 17–Jul 1 (sowing) |
| Radish | – | May 3–Jun 14 (sow outdoors) | Jul 29–Aug 12 (sowing) |
| Turnip | – | May 10–31 (sow outdoors) | Jul 1–15 (sowing) |
| Parsnip | – | May 17–Jun 7 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 12–May 10 (sow outdoors) | Jun 17–Jul 1 (sowing) |
| Onion (bulbing) | Mar 15–29 | Apr 26–May 10 (transplant) | – |
| Green onion / scallion | – | Apr 26–May 24 (sow outdoors) | Jul 1–15 (sowing) |
| Leek | Mar 15–29 | May 10–24 (transplant) | – |
| Garlic | – | – | Jul 29–Aug 26 (sowing) |
| Shallot | – | Apr 26–May 10 (transplant) | Jul 29–Aug 26 (sowing) |
| Potato | – | May 10–24 (transplant) | – |
| Sweet potato | – | Jun 28–Jul 12 (transplant) | – |
| Sweet corn | – | Jun 14–28 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 14–28 (sow outdoors) | – |
| Bean, pole | – | Jun 14–28 (sow outdoors) | – |
| Lima bean | – | Jun 21–Jul 5 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 28–Jul 19 (sow outdoors) | – |
| Cucumber | May 10–17 | Jun 14–28 (transplant) Jun 14–28 (sow outdoors) | – |
| Summer squash / zucchini | May 10–17 | Jun 14–28 (transplant) Jun 14–28 (sow outdoors) | – |
| Winter squash | May 10–17 | Jun 14–28 (transplant) Jun 14–28 (sow outdoors) | – |
| Pumpkin | – | Jun 14–28 (sow outdoors) | – |
| Watermelon | May 10–17 | Jun 21–Jul 5 (transplant) Jun 21–Jul 5 (sow outdoors) | – |
| Cantaloupe / muskmelon | May 10–17 | Jun 21–Jul 5 (transplant) Jun 21–Jul 5 (sow outdoors) | – |
| Okra | Apr 26–May 10 | Jun 21–Jul 5 (transplant) Jun 21–Jul 5 (sow outdoors) | – |
| Celery | Mar 15–29 | Jun 14–21 (transplant) | – |
| Basil | Apr 26–May 10 | Jun 14–28 (transplant) Jun 14–28 (sow outdoors) | – |
| Cilantro | – | May 24–Jun 21 (sow outdoors) | Jul 15–29 (sowing) |
| Parsley | Mar 29–Apr 12 | May 24–Jun 7 (transplant) May 17–Jun 7 (sow outdoors) | – |
| Dill | – | Jun 7–21 (sow outdoors) | Jul 15–29 (sowing) |
| Sunflower | – | Jun 7–21 (sow outdoors) | – |
| Asparagus (crowns) | – | May 10–24 (transplant) | – |
| Rhubarb (crowns) | – | May 10–24 (transplant) | – |
| Strawberry (plants) | – | May 10–24 (transplant) | Jul 1–29 (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: Wallowa, OR (NOAA GHCN-Daily ID USC00358997), elevation 2,923 ft, 5.5 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Enterprise 20 NNE, OR | 18 mi | Jun 8 | Sep 5 |
| Elgin, OR | 21 mi | May 24 | Sep 18 |
| Joseph, OR | 25 mi | May 24 | Oct 1 |
The average last-frost dates of these stations span 15 days, a rough guide to local variation. See data sources & methods.
Frost questions for 97885
When is the last frost in 97885?
The average (50% chance) last spring freeze of 32°F for ZIP 97885 is June 7. For a more cautious planting date, use July 7, when only 1 year in 10 still sees a later freeze.
When is the first frost in 97885?
The average first fall freeze is September 9. In 1 year in 10 it comes by August 24.
What hardiness zone is 97885?
ZIP 97885 is in USDA zone 6b (-5 to 0°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 97885 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
97827 Elgin 97828 Enterprise 97857 Lostine 97824 Cove 97841 Imbler 97876 Summerville 97846 Wallowa Lake 99401 Anatone
Other ZIP codes in Wallowa County
97828 97842 97846 97857 All Wallowa County frost dates · Oregon frost dates
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