Frost dates for ZIP 98051 (Ravensdale, WA)
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, Palmer 3 ESE, WA (3 miles away).
- Average last spring frostApr 350% chance of a 32°F freeze after this date
- Average first fall frostNov 1150% chance of a 32°F freeze by this date
- Growing season (frost-free)219 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
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 98051 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 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 11: 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) | Mar 7 |
| 50% (the "average" last frost) | Apr 3 |
| 10% (cautious: only 1 year in 10 freezes later) | May 2 |
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 25 |
| 50% (the "average" first frost) | Nov 11 |
| 90% (late: most years have frozen by now) | Dec 3 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 1 | Oct 23 |
| 32°F (freeze) | Apr 3 | Nov 11 |
| 28°F (hard freeze) | Feb 28 | Dec 1 |
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 98051
Dates count from your average last spring frost (Apr 3) and first fall frost (Nov 11). 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 | Feb 6–20 | Apr 10–24 (transplant) | Jul 15–Aug 12 (transplant) |
| Pepper (sweet and hot) | Jan 23–Feb 6 | Apr 17–May 1 (transplant) | Jul 22–Aug 12 (transplant) |
| Eggplant | Jan 23–Feb 6 | Apr 17–May 1 (transplant) | Jul 22–Aug 12 (transplant) |
| Tomatillo | Feb 6–20 | Apr 10–24 (transplant) | – |
| Lettuce | Feb 6–20 | Mar 13–Apr 3 (transplant) Mar 6–Apr 17 (sow outdoors) | Sep 16–Oct 7 (transplant) Sep 2–30 (sowing) |
| Spinach | – | Feb 20–Mar 13 (sow outdoors) | Sep 16–Oct 7 (sowing) |
| Kale | Feb 6–20 | Mar 6–20 (transplant) Mar 6–20 (sow outdoors) | Aug 19–Sep 16 (transplant) Aug 5–Sep 2 (sowing) |
| Collards | Feb 6–20 | Mar 6–Apr 3 (transplant) Mar 6–Apr 3 (sow outdoors) | Aug 19–Sep 16 (transplant) Aug 5–Sep 2 (sowing) |
| Broccoli | Jan 23–Feb 6 | Mar 6–20 (transplant) | Aug 5–Sep 2 (transplant) |
| Cabbage | Jan 23–Feb 6 | Mar 6–20 (transplant) | Aug 5–Sep 2 (transplant) |
| Cauliflower | Jan 23–Feb 6 | Mar 20–Apr 3 (transplant) | Aug 5–Sep 2 (transplant) |
| Brussels sprouts | Jan 9–23 | Mar 6–20 (transplant) | Jul 22–Aug 12 (transplant) |
| Kohlrabi | Feb 6–20 | Mar 6–20 (transplant) Mar 6–20 (sow outdoors) | Sep 2–16 (sowing) |
| Bok choy / Asian greens | – | Mar 6–20 (sow outdoors) | Sep 16–30 (sowing) |
| Arugula | – | Mar 6–Apr 3 (sow outdoors) | Sep 16–Oct 14 (sowing) |
| Mustard greens | – | Mar 6–27 (sow outdoors) | Sep 16–30 (sowing) |
| Swiss chard | Feb 20–Mar 6 | Mar 20–Apr 10 (transplant) Mar 20–Apr 17 (sow outdoors) | Sep 2–16 (sowing) |
| Beet | – | Mar 6–Apr 3 (sow outdoors) | Sep 2–16 (sowing) |
| Carrot | – | Mar 13–Apr 10 (sow outdoors) | Aug 19–Sep 2 (sowing) |
| Radish | – | Feb 27–Apr 10 (sow outdoors) | Sep 30–Oct 14 (sowing) |
| Turnip | – | Mar 6–27 (sow outdoors) | Sep 2–16 (sowing) |
| Parsnip | – | Mar 13–Apr 3 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 6–Mar 6 (sow outdoors) | Aug 19–Sep 2 (sowing) |
| Onion (bulbing) | Jan 9–23 | Feb 20–Mar 6 (transplant) | – |
| Green onion / scallion | – | Feb 20–Mar 20 (sow outdoors) | Sep 2–16 (sowing) |
| Leek | Jan 9–23 | Mar 6–20 (transplant) | – |
| Garlic | – | – | Sep 30–Oct 28 (sowing) |
| Shallot | – | Feb 20–Mar 6 (transplant) | Sep 30–Oct 28 (sowing) |
| Potato | – | Mar 6–20 (transplant) | Jul 22–Aug 5 (transplant) |
| Sweet potato | – | Apr 24–May 8 (transplant) | – |
| Sweet corn | – | Apr 10–24 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 10–24 (sow outdoors) | Aug 19–Sep 2 (sowing) |
| Bean, pole | – | Apr 10–24 (sow outdoors) | – |
| Lima bean | – | Apr 17–May 1 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 24–May 15 (sow outdoors) | – |
| Cucumber | Mar 6–13 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | Aug 19–Sep 2 (sowing) |
| Summer squash / zucchini | Mar 6–13 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | Aug 19–Sep 2 (sowing) |
| Winter squash | Mar 6–13 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | – |
| Pumpkin | – | Apr 10–24 (sow outdoors) | – |
| Watermelon | Mar 6–13 | Apr 17–May 1 (transplant) Apr 17–May 1 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 6–13 | Apr 17–May 1 (transplant) Apr 17–May 1 (sow outdoors) | – |
| Okra | Feb 20–Mar 6 | Apr 17–May 1 (transplant) Apr 17–May 1 (sow outdoors) | – |
| Celery | Jan 9–23 | Apr 10–17 (transplant) | – |
| Basil | Feb 20–Mar 6 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | – |
| Cilantro | – | Mar 20–Apr 17 (sow outdoors) | Sep 16–30 (sowing) |
| Parsley | Jan 23–Feb 6 | Mar 20–Apr 3 (transplant) Mar 13–Apr 3 (sow outdoors) | – |
| Dill | – | Apr 3–17 (sow outdoors) | Sep 16–30 (sowing) |
| Sunflower | – | Apr 3–17 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 6–20 (transplant) | – |
| Rhubarb (crowns) | – | Mar 6–20 (transplant) | – |
| Strawberry (plants) | – | Mar 6–20 (transplant) | Sep 2–30 (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: Palmer 3 ESE, WA (NOAA GHCN-Daily ID USC00456295), elevation 920 ft, 3.1 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Landsburg, WA | 4 mi | Apr 20 | Oct 25 |
| Cedar Lake, WA | 8 mi | Apr 23 | Nov 1 |
| Buckley 1 NE, WA | 13 mi | Apr 7 | Oct 30 |
The average last-frost dates of these stations span 20 days, a rough guide to local variation. See data sources & methods.
Frost questions for 98051
When is the last frost in 98051?
The average (50% chance) last spring freeze of 32°F for ZIP 98051 is April 3. For a more cautious planting date, use May 2, when only 1 year in 10 still sees a later freeze.
When is the first frost in 98051?
The average first fall freeze is November 11. In 1 year in 10 it comes by October 25.
What hardiness zone is 98051?
ZIP 98051 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 98051 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
98010 Black Diamond 98038 Hobart 98025 98042 Lake Morton-Berrydale 98092 Auburn 98027 Mirrormont 98045 North Bend 98058 Fairwood
Other ZIP codes in King County
98001 98002 98003 98004 98005 98006 98007 98008 98010 98011 98014 98019 98022 98023 98024 98025 98027 98028 98029 98030 98031 98032 98033 98034 All King County frost dates · Washington frost dates
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