Frost dates for ZIP 98937 (Cliffdell, 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, Packwood, WA (25 miles away).
- Average last spring frostApr 3050% chance of a 32°F freeze after this date
- Average first fall frostOct 850% chance of a 32°F freeze by this date
- Growing season (frost-free)162 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
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 98937 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) | Apr 12 |
| 50% (the "average" last frost) | Apr 30 |
| 10% (cautious: only 1 year in 10 freezes later) | May 17 |
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 8 |
| 90% (late: most years have frozen by now) | Oct 31 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 15 | Sep 24 |
| 32°F (freeze) | Apr 30 | Oct 8 |
| 28°F (hard freeze) | Apr 6 | Oct 29 |
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 98937
Dates count from your average last spring frost (Apr 30) and first fall frost (Oct 8). 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 5–19 | May 7–21 (transplant) | – |
| Pepper (sweet and hot) | Feb 19–Mar 5 | May 14–28 (transplant) | – |
| Eggplant | Feb 19–Mar 5 | May 14–28 (transplant) | – |
| Tomatillo | Mar 5–19 | May 7–21 (transplant) | – |
| Lettuce | Mar 5–19 | Apr 9–30 (transplant) Apr 2–May 14 (sow outdoors) | Aug 13–Sep 3 (transplant) Jul 30–Aug 27 (sowing) |
| Spinach | – | Mar 19–Apr 9 (sow outdoors) | Aug 13–Sep 3 (sowing) |
| Kale | Mar 5–19 | Apr 2–16 (transplant) Apr 2–16 (sow outdoors) | Jul 16–Aug 13 (transplant) Jul 2–30 (sowing) |
| Collards | Mar 5–19 | Apr 2–30 (transplant) Apr 2–30 (sow outdoors) | Jul 16–Aug 13 (transplant) Jul 2–30 (sowing) |
| Broccoli | Feb 19–Mar 5 | Apr 2–16 (transplant) | Jul 2–30 (transplant) |
| Cabbage | Feb 19–Mar 5 | Apr 2–16 (transplant) | Jul 2–30 (transplant) |
| Cauliflower | Feb 19–Mar 5 | Apr 16–30 (transplant) | Jul 2–30 (transplant) |
| Brussels sprouts | Feb 5–19 | Apr 2–16 (transplant) | Jun 18–Jul 9 (transplant) |
| Kohlrabi | Mar 5–19 | Apr 2–16 (transplant) Apr 2–16 (sow outdoors) | Jul 30–Aug 13 (sowing) |
| Bok choy / Asian greens | – | Apr 2–16 (sow outdoors) | Aug 13–27 (sowing) |
| Arugula | – | Apr 2–30 (sow outdoors) | Aug 13–Sep 10 (sowing) |
| Mustard greens | – | Apr 2–23 (sow outdoors) | Aug 13–27 (sowing) |
| Swiss chard | Mar 19–Apr 2 | Apr 16–May 7 (transplant) Apr 16–May 14 (sow outdoors) | Jul 30–Aug 13 (sowing) |
| Beet | – | Apr 2–30 (sow outdoors) | Jul 30–Aug 13 (sowing) |
| Carrot | – | Apr 9–May 7 (sow outdoors) | Jul 16–30 (sowing) |
| Radish | – | Mar 26–May 7 (sow outdoors) | Aug 27–Sep 10 (sowing) |
| Turnip | – | Apr 2–23 (sow outdoors) | Jul 30–Aug 13 (sowing) |
| Parsnip | – | Apr 9–30 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Mar 5–Apr 2 (sow outdoors) | Jul 16–30 (sowing) |
| Onion (bulbing) | Feb 5–19 | Mar 19–Apr 2 (transplant) | – |
| Green onion / scallion | – | Mar 19–Apr 16 (sow outdoors) | Jul 30–Aug 13 (sowing) |
| Leek | Feb 5–19 | Apr 2–16 (transplant) | – |
| Garlic | – | – | Aug 27–Sep 24 (sowing) |
| Shallot | – | Mar 19–Apr 2 (transplant) | Aug 27–Sep 24 (sowing) |
| Potato | – | Apr 2–16 (transplant) | Jun 18–Jul 2 (transplant) |
| Sweet potato | – | May 21–Jun 4 (transplant) | – |
| Sweet corn | – | May 7–21 (sow outdoors) | – |
| Bean, bush (snap) | – | May 7–21 (sow outdoors) | – |
| Bean, pole | – | May 7–21 (sow outdoors) | – |
| Lima bean | – | May 14–28 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 21–Jun 11 (sow outdoors) | – |
| Cucumber | Apr 2–9 | May 7–21 (transplant) May 7–21 (sow outdoors) | – |
| Summer squash / zucchini | Apr 2–9 | May 7–21 (transplant) May 7–21 (sow outdoors) | – |
| Winter squash | Apr 2–9 | May 7–21 (transplant) May 7–21 (sow outdoors) | – |
| Pumpkin | – | May 7–21 (sow outdoors) | – |
| Watermelon | Apr 2–9 | May 14–28 (transplant) May 14–28 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 2–9 | May 14–28 (transplant) May 14–28 (sow outdoors) | – |
| Okra | Mar 19–Apr 2 | May 14–28 (transplant) May 14–28 (sow outdoors) | – |
| Celery | Feb 5–19 | May 7–14 (transplant) | – |
| Basil | Mar 19–Apr 2 | May 7–21 (transplant) May 7–21 (sow outdoors) | – |
| Cilantro | – | Apr 16–May 14 (sow outdoors) | Aug 13–27 (sowing) |
| Parsley | Feb 19–Mar 5 | Apr 16–30 (transplant) Apr 9–30 (sow outdoors) | – |
| Dill | – | Apr 30–May 14 (sow outdoors) | Aug 13–27 (sowing) |
| Sunflower | – | Apr 30–May 14 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 2–16 (transplant) | – |
| Rhubarb (crowns) | – | Apr 2–16 (transplant) | – |
| Strawberry (plants) | – | Apr 2–16 (transplant) | Jul 30–Aug 27 (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: Packwood, WA (NOAA GHCN-Daily ID USC00456262), elevation 1,060 ft, 24.7 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Longmire Rainier Nps, WA | 28 mi | May 22 | Oct 3 |
| Cle Elum, WA | 31 mi | May 13 | Sep 25 |
| Easton, WA | 31 mi | May 9 | Oct 6 |
The average last-frost dates of these stations span 23 days, a rough guide to local variation. See data sources & methods.
Frost questions for 98937
When is the last frost in 98937?
The average (50% chance) last spring freeze of 32°F for ZIP 98937 is April 30. For a more cautious planting date, use May 17, when only 1 year in 10 still sees a later freeze.
When is the first frost in 98937?
The average first fall freeze is October 8. In 1 year in 10 it comes by September 21.
What hardiness zone is 98937?
ZIP 98937 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 98937 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
98947 Tieton 98361 Packwood 98903 Ahtanum 98908 Yakima 98304 Ashford 98923 Cowiche 98942 Selah 98946 Thorp
Other ZIP codes in Yakima County
98901 98902 98903 98908 98921 98923 98930 98932 98933 98935 98936 98938 98939 98942 98947 98948 98951 98952 98953 All Yakima County frost dates · Washington frost dates
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