Frost dates for 98546Grapeview, WA
The average last spring frost in Grapeview is March 24 and the average first fall frost is November 15, giving a typical growing season of about 235 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 24
- Average first fall frost
- Nov 15
- Growing season
- 235 days
Safer after Apr 17 (1-in-10 risk)
Possible by Oct 25 (1-in-10 risk)
First frost typically in 12 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Apr 2 · Apr 22 · May 8 | Oct 11 · Oct 28 · Nov 15 | 187 days | 100% |
| Frost / freeze (32°F) | Feb 26 · Mar 24 · Apr 17 | Oct 25 · Nov 15 · Dec 8 | 235 days | 100% |
| Hard freeze (28°F) | Jan 4 · Feb 20 · Mar 17 | Nov 9 · Dec 7 · Jan 13 | 294 days | 98% |
Planting calendar for Grapeview
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Feb 21 – Apr 29 |
| Tomatoes | Transplant outdoors | Apr 9 – Jul 26 |
| Peppers | Start seeds indoors | Feb 21 – Mar 24 |
| Peppers | Transplant outdoors | Apr 23 – May 24 |
| Eggplant | Start seeds indoors | Mar 10 – Apr 8 |
| Eggplant | Transplant outdoors | Apr 23 – May 24 |
| Cucumbers | Sow outdoors | Apr 23 – Aug 5 |
| Summer squash | Sow outdoors | Apr 9 – May 24 |
| Winter squash & pumpkins | Sow outdoors | Apr 23 – May 24 |
| Snap beans | Sow outdoors | Apr 9 – Aug 28 |
| Sweet corn | Sow outdoors | Apr 9 – Jul 26 |
| Watermelon & cantaloupe | Sow outdoors | Apr 23 – May 24 |
| Okra | Sow outdoors | Apr 16 – May 9 |
| Peas | Sow outdoors (spring) | Feb 21 – Apr 8 |
| Potatoes | Plant outdoors (spring) | Feb 21 – Apr 23 |
| Onions | Start seeds indoors (spring) | Jan 10 – Feb 6 |
| Onions | Transplant outdoors (spring) | Mar 10 – Apr 8 |
| Broccoli | Start seeds indoors (spring) | Feb 3 – Mar 9 |
| Broccoli | Transplant outdoors (spring) | Mar 10 – Apr 8 |
| Broccoli | Start seeds indoors (fall) | Jul 16 – Jul 26 |
| Broccoli | Transplant outdoors (fall) | Aug 15 – Aug 26 |
| Cabbage | Start seeds indoors (spring) | Jan 24 – Feb 21 |
| Cabbage | Transplant outdoors (spring) | Feb 21 – Mar 24 |
| Cabbage | Start seeds indoors (fall) | Jul 6 – Aug 5 |
| Cabbage | Transplant outdoors (fall) | Aug 5 – Sep 5 |
| Leaf lettuce | Sow outdoors (spring) | Feb 21 – May 9 |
| Leaf lettuce | Sow outdoors (fall) | Aug 5 – Sep 21 |
| Spinach | Sow outdoors (spring) | Feb 14 – Mar 30 |
| Spinach | Sow outdoors (fall) | Aug 22 – Sep 26 |
| Radishes | Sow outdoors (spring) | Feb 21 – Apr 13 |
| Radishes | Sow outdoors (fall) | Aug 5 – Oct 6 |
| Kale | Sow outdoors (spring) | Mar 10 – Mar 30 |
| Kale | Sow outdoors (fall) | Jul 29 – Sep 5 |
| Carrots | Sow outdoors (spring) | Mar 24 – May 9 |
| Carrots | Sow outdoors (fall) | Jul 6 – Aug 21 |
| Garlic | Plant outdoors (fall) | Nov 5 – Dec 6 |
Where these dates come from
ZIP code 98546 is matched to the NOAA station Cushman Powerhouse #2, WA, 19 km away, at 21 ft elevation (123 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Cushman Powerhouse #2, WA (used) | 21 ft | Mar 24 | Nov 15 |
| Shelton Sanderson Fld, WA | 271 ft | Apr 27 | Oct 16 |
| Tacoma Narrows Ap, WA | 292 ft | Mar 11 | Nov 21 |
| Bremerton, WA | 110 ft | Mar 29 | Nov 14 |
Frost dates near Grapeview
- Allyn, WA 98524 · last Mar 11, first Nov 21
- Vaughn, WA 98394 · last Mar 11, first Nov 21
- Lakebay, WA 98349 · last Mar 11, first Nov 21
- Belfair, WA 98528 · last Apr 27, first Oct 16
- Union, WA 98592 · last Apr 27, first Oct 16
- Tahuya, WA 98588 · last Mar 24, first Nov 15
- Gig Harbor, WA 98329 · last Mar 29, first Nov 14
- Longbranch, WA 98351 · last Mar 11, first Nov 21
Frequently asked questions
- When is the last frost in Grapeview, WA?
- For ZIP code 98546, the average last spring frost (32°F) is March 24, based on NOAA 1991-2020 climate normals for the Cushman Powerhouse #2, WA weather station. There is a 1-in-10 chance of a frost after April 17.
- When is the first frost in Grapeview, WA?
- The average first fall frost (32°F) is November 15. There is a 1-in-10 chance of frost by October 25, so tender plants are at risk from that point on.
- How long is the growing season in 98546?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 235 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.