Frost dates for 97543Wilderville, OR
The average last spring frost in Wilderville is May 1 and the average first fall frost is October 12, giving a typical growing season of about 161 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 1
- Average first fall frost
- Oct 12
- Growing season
- 161 days
Safer after May 23 (1-in-10 risk)
Possible by Sep 23 (1-in-10 risk)
Last frost typically in 180 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) | May 5 · May 28 · Jun 17 | Sep 7 · Sep 23 · Oct 9 | 118 days | 100% |
| Frost / freeze (32°F) | Apr 14 · May 1 · May 23 | Sep 23 · Oct 12 · Nov 2 | 161 days | 100% |
| Hard freeze (28°F) | Mar 4 · Apr 4 · Apr 28 | Oct 12 · Nov 2 · Dec 6 | 210 days | 100% |
Planting calendar for Wilderville
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 31 – Jun 6 |
| Tomatoes | Transplant outdoors | May 17 – Jun 22 |
| Peppers | Start seeds indoors | Mar 31 – May 1 |
| Peppers | Transplant outdoors | May 31 – Jul 1 |
| Eggplant | Start seeds indoors | Apr 17 – May 16 |
| Eggplant | Transplant outdoors | May 31 – Jul 1 |
| Cucumbers | Sow outdoors | May 31 – Jul 2 |
| Summer squash | Sow outdoors | May 17 – Jul 1 |
| Winter squash & pumpkins | Sow outdoors | May 31 – Jul 1 |
| Snap beans | Sow outdoors | May 17 – Jul 25 |
| Sweet corn | Sow outdoors | May 17 – Jun 22 |
| Watermelon & cantaloupe | Sow outdoors | May 31 – Jul 1 |
| Okra | Sow outdoors | May 24 – Jun 16 |
| Peas | Sow outdoors (spring) | Mar 31 – May 16 |
| Potatoes | Plant outdoors (spring) | Mar 31 – May 31 |
| Onions | Start seeds indoors (spring) | Feb 17 – Mar 16 |
| Onions | Transplant outdoors (spring) | Apr 17 – May 16 |
| Broccoli | Start seeds indoors (spring) | Mar 13 – Apr 16 |
| Broccoli | Transplant outdoors (spring) | Apr 17 – May 16 |
| Broccoli | Start seeds indoors (fall) | Jun 12 – Jun 22 |
| Broccoli | Transplant outdoors (fall) | Jul 12 – Jul 23 |
| Cabbage | Start seeds indoors (spring) | Mar 3 – Mar 31 |
| Cabbage | Transplant outdoors (spring) | Mar 31 – May 1 |
| Cabbage | Start seeds indoors (fall) | Jun 2 – Jul 2 |
| Cabbage | Transplant outdoors (fall) | Jul 2 – Aug 2 |
| Leaf lettuce | Sow outdoors (spring) | Mar 31 – Jun 16 |
| Leaf lettuce | Sow outdoors (fall) | Jul 2 – Aug 18 |
| Spinach | Sow outdoors (spring) | Mar 24 – May 7 |
| Spinach | Sow outdoors (fall) | Jul 19 – Aug 23 |
| Radishes | Sow outdoors (spring) | Mar 31 – May 21 |
| Radishes | Sow outdoors (fall) | Jul 2 – Sep 2 |
| Kale | Sow outdoors (spring) | Apr 17 – May 7 |
| Kale | Sow outdoors (fall) | Jun 25 – Aug 2 |
| Carrots | Sow outdoors (spring) | May 1 – Jun 16 |
| Carrots | Sow outdoors (fall) | Jun 2 – Jul 18 |
| Garlic | Plant outdoors (fall) | Oct 2 – Nov 2 |
Where these dates come from
ZIP code 97543 is matched to the NOAA station Cave Junction 1 Wnw, OR, 24.8 km away, at 1,377 ft elevation (90 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Cave Junction 1 Wnw, OR (used) | 1,377 ft | May 1 | Oct 12 |
| Grants Pass, OR | 932 ft | Apr 8 | Oct 28 |
| Sexton Summit, OR | 3,832 ft | May 16 | Oct 30 |
| Ruch, OR | 1,550 ft | May 4 | Oct 13 |
Frost dates near Wilderville
- Selma, OR 97538 · last May 1, first Oct 12
- Grants Pass, OR 97527 · last Apr 8, first Oct 28
- Merlin, OR 97532 · last Apr 8, first Oct 28
- Kerby, OR 97531 · last May 1, first Oct 12
- Murphy, OR 97533 · last May 4, first Oct 13
- Cave Junction, OR 97523 · last May 1, first Oct 12
- Williams, OR 97544 · last May 4, first Oct 13
- Wolf Creek, OR 97497 · last Apr 8, first Oct 28
Frequently asked questions
- When is the last frost in Wilderville, OR?
- For ZIP code 97543, the average last spring frost (32°F) is May 1, based on NOAA 1991-2020 climate normals for the Cave Junction 1 Wnw, OR weather station. There is a 1-in-10 chance of a frost after May 23.
- When is the first frost in Wilderville, OR?
- The average first fall frost (32°F) is October 12. There is a 1-in-10 chance of frost by September 23, so tender plants are at risk from that point on.
- How long is the growing season in 97543?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 161 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.