Frost dates for ZIP 97825 (Dayville, 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, Dayville 8 NW, OR (14 miles away).
- Average last spring frostMay 450% chance of a 32°F freeze after this date
- Average first fall frostOct 650% chance of a 32°F freeze by this date
- Growing season (frost-free)155 daysmedian, 32°F threshold
- USDA hardiness zone7a0 to 5°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
62°F 55°F or warmer
24-hour average · latest 62°F, as of Oct 17, 9:00 PM CDT
Measured at NOAA USCRN station John Day 35 WNW, 14 mi away. Daily averages: Wed 62°, Thu 62°, Fri 62°.
4-inch depth
62°F 55°F or warmer
24-hour average · latest 62°F, as of Oct 17, 9:00 PM CDT
Measured at NOAA USCRN station John Day 35 WNW, 14 mi away. Daily averages: Wed 62°, Thu 62°, Fri 62°.
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 97825 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 62°F at 4 inches. Fall pre-emergent (annual bluegrass, winter weeds): window open as soil cools through the 70s and 60s.
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) | Apr 18 |
| 50% (the "average" last frost) | May 4 |
| 10% (cautious: only 1 year in 10 freezes later) | May 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) | Sep 21 |
| 50% (the "average" first frost) | Oct 6 |
| 90% (late: most years have frozen by now) | Oct 23 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 18 | Sep 23 |
| 32°F (freeze) | May 4 | Oct 6 |
| 28°F (hard freeze) | Apr 18 | Oct 23 |
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 97825
Dates count from your average last spring frost (May 4) and first fall frost (Oct 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 | Mar 9–23 | May 11–25 (transplant) | – |
| Pepper (sweet and hot) | Feb 23–Mar 9 | May 18–Jun 1 (transplant) | – |
| Eggplant | Feb 23–Mar 9 | May 18–Jun 1 (transplant) | – |
| Tomatillo | Mar 9–23 | May 11–25 (transplant) | – |
| Lettuce | Mar 9–23 | Apr 13–May 4 (transplant) Apr 6–May 18 (sow outdoors) | Aug 11–Sep 1 (transplant) Jul 28–Aug 25 (sowing) |
| Spinach | – | Mar 23–Apr 13 (sow outdoors) | Aug 11–Sep 1 (sowing) |
| Kale | Mar 9–23 | Apr 6–20 (transplant) Apr 6–20 (sow outdoors) | Jul 14–Aug 11 (transplant) Jun 30–Jul 28 (sowing) |
| Collards | Mar 9–23 | Apr 6–May 4 (transplant) Apr 6–May 4 (sow outdoors) | Jul 14–Aug 11 (transplant) Jun 30–Jul 28 (sowing) |
| Broccoli | Feb 23–Mar 9 | Apr 6–20 (transplant) | Jun 30–Jul 28 (transplant) |
| Cabbage | Feb 23–Mar 9 | Apr 6–20 (transplant) | Jun 30–Jul 28 (transplant) |
| Cauliflower | Feb 23–Mar 9 | Apr 20–May 4 (transplant) | Jun 30–Jul 28 (transplant) |
| Brussels sprouts | Feb 9–23 | Apr 6–20 (transplant) | Jun 16–Jul 7 (transplant) |
| Kohlrabi | Mar 9–23 | Apr 6–20 (transplant) Apr 6–20 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Bok choy / Asian greens | – | Apr 6–20 (sow outdoors) | Aug 11–25 (sowing) |
| Arugula | – | Apr 6–May 4 (sow outdoors) | Aug 11–Sep 8 (sowing) |
| Mustard greens | – | Apr 6–27 (sow outdoors) | Aug 11–25 (sowing) |
| Swiss chard | Mar 23–Apr 6 | Apr 20–May 11 (transplant) Apr 20–May 18 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Beet | – | Apr 6–May 4 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Carrot | – | Apr 13–May 11 (sow outdoors) | Jul 14–28 (sowing) |
| Radish | – | Mar 30–May 11 (sow outdoors) | Aug 25–Sep 8 (sowing) |
| Turnip | – | Apr 6–27 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Parsnip | – | Apr 13–May 4 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Mar 9–Apr 6 (sow outdoors) | Jul 14–28 (sowing) |
| Onion (bulbing) | Feb 9–23 | Mar 23–Apr 6 (transplant) | – |
| Green onion / scallion | – | Mar 23–Apr 20 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Leek | Feb 9–23 | Apr 6–20 (transplant) | – |
| Garlic | – | – | Aug 25–Sep 22 (sowing) |
| Shallot | – | Mar 23–Apr 6 (transplant) | Aug 25–Sep 22 (sowing) |
| Potato | – | Apr 6–20 (transplant) | Jun 16–30 (transplant) |
| Sweet potato | – | May 25–Jun 8 (transplant) | – |
| Sweet corn | – | May 11–25 (sow outdoors) | – |
| Bean, bush (snap) | – | May 11–25 (sow outdoors) | – |
| Bean, pole | – | May 11–25 (sow outdoors) | – |
| Lima bean | – | May 18–Jun 1 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 25–Jun 15 (sow outdoors) | – |
| Cucumber | Apr 6–13 | May 11–25 (transplant) May 11–25 (sow outdoors) | – |
| Summer squash / zucchini | Apr 6–13 | May 11–25 (transplant) May 11–25 (sow outdoors) | – |
| Winter squash | Apr 6–13 | May 11–25 (transplant) May 11–25 (sow outdoors) | – |
| Pumpkin | – | May 11–25 (sow outdoors) | – |
| Watermelon | Apr 6–13 | May 18–Jun 1 (transplant) May 18–Jun 1 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 6–13 | May 18–Jun 1 (transplant) May 18–Jun 1 (sow outdoors) | – |
| Okra | Mar 23–Apr 6 | May 18–Jun 1 (transplant) May 18–Jun 1 (sow outdoors) | – |
| Celery | Feb 9–23 | May 11–18 (transplant) | – |
| Basil | Mar 23–Apr 6 | May 11–25 (transplant) May 11–25 (sow outdoors) | – |
| Cilantro | – | Apr 20–May 18 (sow outdoors) | Aug 11–25 (sowing) |
| Parsley | Feb 23–Mar 9 | Apr 20–May 4 (transplant) Apr 13–May 4 (sow outdoors) | – |
| Dill | – | May 4–18 (sow outdoors) | Aug 11–25 (sowing) |
| Sunflower | – | May 4–18 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 6–20 (transplant) | – |
| Rhubarb (crowns) | – | Apr 6–20 (transplant) | – |
| Strawberry (plants) | – | Apr 6–20 (transplant) | Jul 28–Aug 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: Dayville 8 NW, OR (NOAA GHCN-Daily ID USC00352173), elevation 2,260 ft, 13.9 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| John Day 35 WNW, OR | 14 mi | Apr 30 | Oct 14 |
| John Day, OR | 27 mi | May 28 | Sep 18 |
| Long Creek, OR | 30 mi | Jun 5 | Sep 14 |
The average last-frost dates of these stations span 37 days, a rough guide to local variation. See data sources & methods.
Frost questions for 97825
When is the last frost in 97825?
The average (50% chance) last spring freeze of 32°F for ZIP 97825 is May 4. For a more cautious planting date, use May 23, when only 1 year in 10 still sees a later freeze.
When is the first frost in 97825?
The average first fall freeze is October 6. In 1 year in 10 it comes by September 21.
What hardiness zone is 97825?
ZIP 97825 is in USDA zone 7a (0 to 5°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 97825 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
97865 Mount Vernon 97820 Canyon City 97751 97848 97864 Monument 97845 John Day 97873 Seneca 97874 Spray
Other ZIP codes in Grant County
97817 97820 97845 97848 97856 97864 97865 97869 97873 97877 All Grant County frost dates · Oregon frost dates
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