Frost dates for 97432Dillard, OR
The average last spring frost in Dillard is March 23 and the average first fall frost is November 18, giving a typical growing season of about 237 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 23
- Average first fall frost
- Nov 18
- Growing season
- 237 days
Safer after Apr 16 (1-in-10 risk)
Possible by Oct 24 (1-in-10 risk)
First frost typically in 16 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) | Mar 31 · Apr 21 · May 9 | Oct 8 · Oct 25 · Nov 17 | 188 days | 100% |
| Frost / freeze (32°F) | Feb 25 · Mar 23 · Apr 16 | Oct 24 · Nov 18 · Dec 17 | 237 days | 100% |
| Hard freeze (28°F) | Dec 31 · Feb 20 · Mar 21 | Nov 8 · Dec 11 · Jan 31 | 299 days | 95% |
Planting calendar for Dillard
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 | Feb 20 – Apr 28 |
| Tomatoes | Transplant outdoors | Apr 8 – Jul 29 |
| Peppers | Start seeds indoors | Feb 20 – Mar 23 |
| Peppers | Transplant outdoors | Apr 22 – May 23 |
| Eggplant | Start seeds indoors | Mar 9 – Apr 7 |
| Eggplant | Transplant outdoors | Apr 22 – May 23 |
| Cucumbers | Sow outdoors | Apr 22 – Aug 8 |
| Summer squash | Sow outdoors | Apr 8 – May 23 |
| Winter squash & pumpkins | Sow outdoors | Apr 22 – May 23 |
| Snap beans | Sow outdoors | Apr 8 – Aug 31 |
| Sweet corn | Sow outdoors | Apr 8 – Jul 29 |
| Watermelon & cantaloupe | Sow outdoors | Apr 22 – May 23 |
| Okra | Sow outdoors | Apr 15 – May 8 |
| Peas | Sow outdoors (spring) | Feb 20 – Apr 7 |
| Potatoes | Plant outdoors (spring) | Feb 20 – Apr 22 |
| Onions | Start seeds indoors (spring) | Jan 9 – Feb 5 |
| Onions | Transplant outdoors (spring) | Mar 9 – Apr 7 |
| Broccoli | Start seeds indoors (spring) | Feb 2 – Mar 8 |
| Broccoli | Transplant outdoors (spring) | Mar 9 – Apr 7 |
| Broccoli | Start seeds indoors (fall) | Jul 19 – Jul 29 |
| Broccoli | Transplant outdoors (fall) | Aug 18 – Aug 29 |
| Cabbage | Start seeds indoors (spring) | Jan 23 – Feb 20 |
| Cabbage | Transplant outdoors (spring) | Feb 20 – Mar 23 |
| Cabbage | Start seeds indoors (fall) | Jul 9 – Aug 8 |
| Cabbage | Transplant outdoors (fall) | Aug 8 – Sep 8 |
| Leaf lettuce | Sow outdoors (spring) | Feb 20 – May 8 |
| Leaf lettuce | Sow outdoors (fall) | Aug 8 – Sep 24 |
| Spinach | Sow outdoors (spring) | Feb 13 – Mar 29 |
| Spinach | Sow outdoors (fall) | Aug 25 – Sep 29 |
| Radishes | Sow outdoors (spring) | Feb 20 – Apr 12 |
| Radishes | Sow outdoors (fall) | Aug 8 – Oct 9 |
| Kale | Sow outdoors (spring) | Mar 9 – Mar 29 |
| Kale | Sow outdoors (fall) | Aug 1 – Sep 8 |
| Carrots | Sow outdoors (spring) | Mar 23 – May 8 |
| Carrots | Sow outdoors (fall) | Jul 9 – Aug 24 |
| Garlic | Plant outdoors (fall) | Nov 8 – Dec 9 |
Where these dates come from
ZIP code 97432 is matched to the NOAA station Roseburg Kqen, OR, 11.9 km away, at 425 ft elevation (64 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Roseburg Kqen, OR (used) | 425 ft | Mar 23 | Nov 18 |
| Roseburg Rgnl Ap, OR | 525 ft | Mar 19 | Nov 20 |
| Riddle, OR | 680 ft | Mar 31 | Nov 6 |
| Winchester, OR | 460 ft | Mar 31 | Nov 5 |
Frost dates near Dillard
- Winston, OR 97496 · last Mar 19, first Nov 20
- Tenmile, OR 97481 · last Mar 31, first Nov 6
- Roseburg, OR 97471 · last Mar 19, first Nov 20
- Myrtle Creek, OR 97457 · last Mar 31, first Nov 6
- Riddle, OR 97469 · last Mar 31, first Nov 6
- Camas Valley, OR 97416 · last Mar 31, first Nov 6
- Winchester, OR 97495 · last Mar 19, first Nov 20
- Canyonville, OR 97417 · last Mar 31, first Nov 6
Frequently asked questions
- When is the last frost in Dillard, OR?
- For ZIP code 97432, the average last spring frost (32°F) is March 23, based on NOAA 1991-2020 climate normals for the Roseburg Kqen, OR weather station. There is a 1-in-10 chance of a frost after April 16.
- When is the first frost in Dillard, OR?
- The average first fall frost (32°F) is November 18. There is a 1-in-10 chance of frost by October 24, so tender plants are at risk from that point on.
- How long is the growing season in 97432?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 237 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.