Frost dates for 98638Naselle, WA
The average last spring frost in Naselle is April 6 and the average first fall frost is October 26, giving a typical growing season of about 200 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 6
- Average first fall frost
- Oct 26
- Growing season
- 200 days
Safer after Apr 28 (1-in-10 risk)
Possible by Oct 4 (1-in-10 risk)
Last frost typically in 155 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 15 · Apr 30 · May 18 | Sep 22 · Oct 6 · Oct 27 | 157 days | 100% |
| Frost / freeze (32°F) | Mar 16 · Apr 6 · Apr 28 | Oct 4 · Oct 26 · Nov 16 | 200 days | 100% |
| Hard freeze (28°F) | Feb 9 · Mar 6 · Mar 30 | Oct 22 · Nov 13 · Dec 15 | 253 days | 100% |
Planting calendar for Naselle
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 | Mar 6 – May 12 |
| Tomatoes | Transplant outdoors | Apr 22 – Jul 6 |
| Peppers | Start seeds indoors | Mar 6 – Apr 6 |
| Peppers | Transplant outdoors | May 6 – Jun 6 |
| Eggplant | Start seeds indoors | Mar 23 – Apr 21 |
| Eggplant | Transplant outdoors | May 6 – Jun 6 |
| Cucumbers | Sow outdoors | May 6 – Jul 16 |
| Summer squash | Sow outdoors | Apr 22 – Jun 6 |
| Winter squash & pumpkins | Sow outdoors | May 6 – Jun 6 |
| Snap beans | Sow outdoors | Apr 22 – Aug 8 |
| Sweet corn | Sow outdoors | Apr 22 – Jul 6 |
| Watermelon & cantaloupe | Sow outdoors | May 6 – Jun 6 |
| Okra | Sow outdoors | Apr 29 – May 22 |
| Peas | Sow outdoors (spring) | Mar 6 – Apr 21 |
| Potatoes | Plant outdoors (spring) | Mar 6 – May 6 |
| Onions | Start seeds indoors (spring) | Jan 23 – Feb 19 |
| Onions | Transplant outdoors (spring) | Mar 23 – Apr 21 |
| Broccoli | Start seeds indoors (spring) | Feb 16 – Mar 22 |
| Broccoli | Transplant outdoors (spring) | Mar 23 – Apr 21 |
| Broccoli | Start seeds indoors (fall) | Jun 26 – Jul 6 |
| Broccoli | Transplant outdoors (fall) | Jul 26 – Aug 6 |
| Cabbage | Start seeds indoors (spring) | Feb 6 – Mar 6 |
| Cabbage | Transplant outdoors (spring) | Mar 6 – Apr 6 |
| Cabbage | Start seeds indoors (fall) | Jun 16 – Jul 16 |
| Cabbage | Transplant outdoors (fall) | Jul 16 – Aug 16 |
| Leaf lettuce | Sow outdoors (spring) | Mar 6 – May 22 |
| Leaf lettuce | Sow outdoors (fall) | Jul 16 – Sep 1 |
| Spinach | Sow outdoors (spring) | Feb 27 – Apr 12 |
| Spinach | Sow outdoors (fall) | Aug 2 – Sep 6 |
| Radishes | Sow outdoors (spring) | Mar 6 – Apr 26 |
| Radishes | Sow outdoors (fall) | Jul 16 – Sep 16 |
| Kale | Sow outdoors (spring) | Mar 23 – Apr 12 |
| Kale | Sow outdoors (fall) | Jul 9 – Aug 16 |
| Carrots | Sow outdoors (spring) | Apr 6 – May 22 |
| Carrots | Sow outdoors (fall) | Jun 16 – Aug 1 |
| Garlic | Plant outdoors (fall) | Oct 16 – Nov 16 |
Where these dates come from
ZIP code 98638 is matched to the NOAA station Long Beach Exp Stn, WA, 18 km away, at 25 ft elevation (34 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Long Beach Exp Stn, WA (used) | 25 ft | Apr 6 | Oct 26 |
| Naselle 2 Ene, WA | 50 ft | Apr 24 | Oct 20 |
| Grays Rvr Hatchery, WA | 100 ft | Apr 27 | Oct 22 |
| Astoria Rgnl Ap, OR | 9 ft | Mar 26 | Nov 11 |
Frost dates near Naselle
- Rosburg, WA 98643 · last Apr 27, first Oct 22
- Chinook, WA 98614 · last Apr 6, first Oct 26
- Grays River, WA 98621 · last Apr 27, first Oct 22
- Ilwaco, WA 98624 · last Apr 6, first Oct 26
- Seaview, WA 98644 · last Apr 6, first Oct 26
- Long Beach, WA 98631 · last Apr 6, first Oct 26
- Hammond, OR 97121 · last Mar 26, first Nov 11
- Astoria, OR 97103 · last Mar 30, first Nov 18
Frequently asked questions
- When is the last frost in Naselle, WA?
- For ZIP code 98638, the average last spring frost (32°F) is April 6, based on NOAA 1991-2020 climate normals for the Long Beach Exp Stn, WA weather station. There is a 1-in-10 chance of a frost after April 28.
- When is the first frost in Naselle, WA?
- The average first fall frost (32°F) is October 26. There is a 1-in-10 chance of frost by October 4, so tender plants are at risk from that point on.
- How long is the growing season in 98638?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 200 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.