Frost dates for 97375Scotts Mills, OR
The average last spring frost in Scotts Mills is April 30 and the average first fall frost is October 22, giving a typical growing season of about 174 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 30
- Average first fall frost
- Oct 22
- Growing season
- 174 days
Safer after May 15 (1-in-10 risk)
Possible by Oct 2 (1-in-10 risk)
Last frost typically in 181 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 2 · May 17 · Jun 4 | Sep 15 · Oct 3 · Oct 21 | 136 days | 100% |
| Frost / freeze (32°F) | Apr 10 · Apr 30 · May 15 | Oct 2 · Oct 22 · Nov 12 | 174 days | 100% |
| Hard freeze (28°F) | Feb 28 · Mar 30 · Apr 28 | Oct 21 · Nov 13 · Dec 13 | 228 days | 100% |
Planting calendar for Scotts Mills
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 30 – Jun 5 |
| Tomatoes | Transplant outdoors | May 16 – Jul 2 |
| Peppers | Start seeds indoors | Mar 30 – Apr 30 |
| Peppers | Transplant outdoors | May 30 – Jun 30 |
| Eggplant | Start seeds indoors | Apr 16 – May 15 |
| Eggplant | Transplant outdoors | May 30 – Jun 30 |
| Cucumbers | Sow outdoors | May 30 – Jul 12 |
| Summer squash | Sow outdoors | May 16 – Jun 30 |
| Winter squash & pumpkins | Sow outdoors | May 30 – Jun 30 |
| Snap beans | Sow outdoors | May 16 – Aug 4 |
| Sweet corn | Sow outdoors | May 16 – Jul 2 |
| Watermelon & cantaloupe | Sow outdoors | May 30 – Jun 30 |
| Okra | Sow outdoors | May 23 – Jun 15 |
| Peas | Sow outdoors (spring) | Mar 30 – May 15 |
| Potatoes | Plant outdoors (spring) | Mar 30 – May 30 |
| Onions | Start seeds indoors (spring) | Feb 16 – Mar 15 |
| Onions | Transplant outdoors (spring) | Apr 16 – May 15 |
| Broccoli | Start seeds indoors (spring) | Mar 12 – Apr 15 |
| Broccoli | Transplant outdoors (spring) | Apr 16 – May 15 |
| Broccoli | Start seeds indoors (fall) | Jun 22 – Jul 2 |
| Broccoli | Transplant outdoors (fall) | Jul 22 – Aug 2 |
| Cabbage | Start seeds indoors (spring) | Mar 2 – Mar 30 |
| Cabbage | Transplant outdoors (spring) | Mar 30 – Apr 30 |
| Cabbage | Start seeds indoors (fall) | Jun 12 – Jul 12 |
| Cabbage | Transplant outdoors (fall) | Jul 12 – Aug 12 |
| Leaf lettuce | Sow outdoors (spring) | Mar 30 – Jun 15 |
| Leaf lettuce | Sow outdoors (fall) | Jul 12 – Aug 28 |
| Spinach | Sow outdoors (spring) | Mar 23 – May 6 |
| Spinach | Sow outdoors (fall) | Jul 29 – Sep 2 |
| Radishes | Sow outdoors (spring) | Mar 30 – May 20 |
| Radishes | Sow outdoors (fall) | Jul 12 – Sep 12 |
| Kale | Sow outdoors (spring) | Apr 16 – May 6 |
| Kale | Sow outdoors (fall) | Jul 5 – Aug 12 |
| Carrots | Sow outdoors (spring) | Apr 30 – Jun 15 |
| Carrots | Sow outdoors (fall) | Jun 12 – Jul 28 |
| Garlic | Plant outdoors (fall) | Oct 12 – Nov 12 |
Where these dates come from
ZIP code 97375 is matched to the NOAA station Silver Creek Falls, OR, 13.2 km away, at 1,350 ft elevation (313 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Silver Creek Falls, OR (used) | 1,350 ft | Apr 30 | Oct 22 |
| Scotts Mills 9 Se, OR | 2,315 ft | Apr 27 | Nov 4 |
| Silverton, OR | 408 ft | Mar 28 | Nov 10 |
| Molalla 7Ne, OR | 647 ft | Mar 16 | Nov 19 |
Frost dates near Scotts Mills
- Silverton, OR 97381 · last Mar 28, first Nov 10
- Saint Benedict, OR 97373 · last Apr 27, first Nov 4
- Molalla, OR 97038 · last Mar 28, first Nov 10
- Mount Angel, OR 97362 · last Mar 28, first Nov 10
- Sublimity, OR 97385 · last Mar 29, first Nov 6
- Mehama, OR 97384 · last Mar 29, first Nov 6
- Salem, OR 97305 · last Apr 3, first Nov 1
- Stayton, OR 97383 · last Mar 29, first Nov 6
Frequently asked questions
- When is the last frost in Scotts Mills, OR?
- For ZIP code 97375, the average last spring frost (32°F) is April 30, based on NOAA 1991-2020 climate normals for the Silver Creek Falls, OR weather station. There is a 1-in-10 chance of a frost after May 15.
- When is the first frost in Scotts Mills, OR?
- The average first fall frost (32°F) is October 22. There is a 1-in-10 chance of frost by October 2, so tender plants are at risk from that point on.
- How long is the growing season in 97375?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 174 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.