Frost dates for 97373Saint Benedict, OR
The average last spring frost in Saint Benedict is April 27 and the average first fall frost is November 4, giving a typical growing season of about 190 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 27
- Average first fall frost
- Nov 4
- Growing season
- 190 days
Safer after May 17 (1-in-10 risk)
Possible by Oct 18 (1-in-10 risk)
First frost typically in 4 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 30 · May 17 · Jun 1 | Oct 2 · Oct 18 · Nov 2 | 152 days | 100% |
| Frost / freeze (32°F) | Apr 4 · Apr 27 · May 17 | Oct 18 · Nov 4 · Nov 23 | 190 days | 100% |
| Hard freeze (28°F) | Feb 10 · Mar 25 · Apr 25 | Nov 1 · Nov 24 · Dec 23 | 245 days | 100% |
Planting calendar for Saint Benedict
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 27 – Jun 2 |
| Tomatoes | Transplant outdoors | May 13 – Jul 15 |
| Peppers | Start seeds indoors | Mar 27 – Apr 27 |
| Peppers | Transplant outdoors | May 27 – Jun 27 |
| Eggplant | Start seeds indoors | Apr 13 – May 12 |
| Eggplant | Transplant outdoors | May 27 – Jun 27 |
| Cucumbers | Sow outdoors | May 27 – Jul 25 |
| Summer squash | Sow outdoors | May 13 – Jun 27 |
| Winter squash & pumpkins | Sow outdoors | May 27 – Jun 27 |
| Snap beans | Sow outdoors | May 13 – Aug 17 |
| Sweet corn | Sow outdoors | May 13 – Jul 15 |
| Watermelon & cantaloupe | Sow outdoors | May 27 – Jun 27 |
| Okra | Sow outdoors | May 20 – Jun 12 |
| Peas | Sow outdoors (spring) | Mar 27 – May 12 |
| Potatoes | Plant outdoors (spring) | Mar 27 – May 27 |
| Onions | Start seeds indoors (spring) | Feb 13 – Mar 12 |
| Onions | Transplant outdoors (spring) | Apr 13 – May 12 |
| Broccoli | Start seeds indoors (spring) | Mar 9 – Apr 12 |
| Broccoli | Transplant outdoors (spring) | Apr 13 – May 12 |
| Broccoli | Start seeds indoors (fall) | Jul 5 – Jul 15 |
| Broccoli | Transplant outdoors (fall) | Aug 4 – Aug 15 |
| Cabbage | Start seeds indoors (spring) | Feb 27 – Mar 27 |
| Cabbage | Transplant outdoors (spring) | Mar 27 – Apr 27 |
| Cabbage | Start seeds indoors (fall) | Jun 25 – Jul 25 |
| Cabbage | Transplant outdoors (fall) | Jul 25 – Aug 25 |
| Leaf lettuce | Sow outdoors (spring) | Mar 27 – Jun 12 |
| Leaf lettuce | Sow outdoors (fall) | Jul 25 – Sep 10 |
| Spinach | Sow outdoors (spring) | Mar 20 – May 3 |
| Spinach | Sow outdoors (fall) | Aug 11 – Sep 15 |
| Radishes | Sow outdoors (spring) | Mar 27 – May 17 |
| Radishes | Sow outdoors (fall) | Jul 25 – Sep 25 |
| Kale | Sow outdoors (spring) | Apr 13 – May 3 |
| Kale | Sow outdoors (fall) | Jul 18 – Aug 25 |
| Carrots | Sow outdoors (spring) | Apr 27 – Jun 12 |
| Carrots | Sow outdoors (fall) | Jun 25 – Aug 10 |
| Garlic | Plant outdoors (fall) | Oct 25 – Nov 25 |
Where these dates come from
ZIP code 97373 is matched to the NOAA station Scotts Mills 9 Se, OR, 6.8 km away, at 2,315 ft elevation (169 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Scotts Mills 9 Se, OR (used) | 2,315 ft | Apr 27 | Nov 4 |
| Silver Creek Falls, OR | 1,350 ft | Apr 30 | Oct 22 |
| Molalla 7Ne, OR | 647 ft | Mar 16 | Nov 19 |
| Silverton, OR | 408 ft | Mar 28 | Nov 10 |
Frost dates near Saint Benedict
- Scotts Mills, OR 97375 · last Apr 30, first Oct 22
- Molalla, OR 97038 · last Mar 28, first Nov 10
- Colton, OR 97017 · last Mar 27, first Nov 14
- Silverton, OR 97381 · last Mar 28, first Nov 10
- Mehama, OR 97384 · last Mar 29, first Nov 6
- Mill City, OR 97360 · last Mar 9, first Dec 3
- Mulino, OR 97042 · last Mar 27, first Nov 14
- Gates, OR 97346 · last Mar 9, first Dec 3
Frequently asked questions
- When is the last frost in Saint Benedict, OR?
- For ZIP code 97373, the average last spring frost (32°F) is April 27, based on NOAA 1991-2020 climate normals for the Scotts Mills 9 Se, OR weather station. There is a 1-in-10 chance of a frost after May 17.
- When is the first frost in Saint Benedict, OR?
- The average first fall frost (32°F) is November 4. There is a 1-in-10 chance of frost by October 18, so tender plants are at risk from that point on.
- How long is the growing season in 97373?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 190 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.