Frost dates for 97057Shaniko, OR
The average last spring frost in Shaniko is May 22 and the average first fall frost is October 3, giving a typical growing season of about 131 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 22
- Average first fall frost
- Oct 3
- Growing season
- 131 days
Safer after Jun 10 (1-in-10 risk)
Possible by Sep 16 (1-in-10 risk)
Last frost typically in 202 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 24 · Jun 14 · Jul 4 | Aug 31 · Sep 19 · Oct 5 | 93 days | 100% |
| Frost / freeze (32°F) | May 4 · May 22 · Jun 10 | Sep 16 · Oct 3 · Oct 17 | 131 days | 100% |
| Hard freeze (28°F) | Apr 17 · May 5 · May 22 | Oct 1 · Oct 18 · Nov 2 | 164 days | 100% |
Planting calendar for Shaniko
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 | Apr 21 – Jun 27 |
| Tomatoes | Transplant outdoors | Jun 7 – Jun 13 |
| Peppers | Start seeds indoors | Apr 21 – May 22 |
| Peppers | Transplant outdoors | Jun 21 – Jul 22 |
| Eggplant | Start seeds indoors | May 8 – Jun 6 |
| Eggplant | Transplant outdoors | Jun 21 – Jul 22 |
| Cucumbers | Sow outdoors | Jun 21 – Jun 23 |
| Summer squash | Sow outdoors | Jun 7 – Jul 22 |
| Winter squash & pumpkins | Sow outdoors | Jun 21 – Jul 22 |
| Snap beans | Sow outdoors | Jun 7 – Jul 16 |
| Sweet corn | Sow outdoors | Jun 7 – Jun 13 |
| Watermelon & cantaloupe | Sow outdoors | Jun 21 – Jul 22 |
| Okra | Sow outdoors | Jun 14 – Jul 7 |
| Peas | Sow outdoors (spring) | Apr 21 – Jun 6 |
| Potatoes | Plant outdoors (spring) | Apr 21 – Jun 21 |
| Onions | Start seeds indoors (spring) | Mar 10 – Apr 6 |
| Onions | Transplant outdoors (spring) | May 8 – Jun 6 |
| Broccoli | Start seeds indoors (spring) | Apr 3 – May 7 |
| Broccoli | Transplant outdoors (spring) | May 8 – Jun 6 |
| Broccoli | Start seeds indoors (fall) | Jun 3 – Jun 13 |
| Broccoli | Transplant outdoors (fall) | Jul 3 – Jul 14 |
| Cabbage | Start seeds indoors (spring) | Mar 24 – Apr 21 |
| Cabbage | Transplant outdoors (spring) | Apr 21 – May 22 |
| Cabbage | Start seeds indoors (fall) | May 24 – Jun 23 |
| Cabbage | Transplant outdoors (fall) | Jun 23 – Jul 24 |
| Leaf lettuce | Sow outdoors (spring) | Apr 21 – Jul 7 |
| Leaf lettuce | Sow outdoors (fall) | Jun 23 – Aug 9 |
| Spinach | Sow outdoors (spring) | Apr 14 – May 28 |
| Spinach | Sow outdoors (fall) | Jul 10 – Aug 14 |
| Radishes | Sow outdoors (spring) | Apr 21 – Jun 11 |
| Radishes | Sow outdoors (fall) | Jun 23 – Aug 24 |
| Kale | Sow outdoors (spring) | May 8 – May 28 |
| Kale | Sow outdoors (fall) | Jun 16 – Jul 24 |
| Carrots | Sow outdoors (spring) | May 22 – Jul 7 |
| Carrots | Sow outdoors (fall) | May 24 – Jul 9 |
| Garlic | Plant outdoors (fall) | Sep 23 – Oct 24 |
Where these dates come from
ZIP code 97057 is matched to the NOAA station Antelope 6 Ssw, OR, 20.4 km away, at 3,030 ft elevation (300 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Antelope 6 Ssw, OR (used) | 3,030 ft | May 22 | Oct 3 |
| Kent, OR | 2,710 ft | May 15 | Oct 11 |
| Fossil, OR | 2,650 ft | Jun 3 | Sep 14 |
| Madras, OR | 2,230 ft | — | — |
Frost dates near Shaniko
- Kent, OR 97033 · last May 22, first Oct 3
- Antelope, OR 97001 · last May 22, first Oct 3
- Ashwood, OR 97711 · last —, first —
- Grass Valley, OR 97029 · last May 15, first Oct 11
- Maupin, OR 97037 · last —, first —
- Tygh Valley, OR 97063 · last May 12, first Oct 4
- Fossil, OR 97830 · last May 22, first Oct 4
- Madras, OR 97741 · last —, first —
Frequently asked questions
- When is the last frost in Shaniko, OR?
- For ZIP code 97057, the average last spring frost (32°F) is May 22, based on NOAA 1991-2020 climate normals for the Antelope 6 Ssw, OR weather station. There is a 1-in-10 chance of a frost after June 10.
- When is the first frost in Shaniko, OR?
- The average first fall frost (32°F) is October 3. There is a 1-in-10 chance of frost by September 16, so tender plants are at risk from that point on.
- How long is the growing season in 97057?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 131 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.