Frost dates for 97476Sixes, OR
The average last spring frost in Sixes is March 16 and the average first fall frost is November 29, giving a typical growing season of about 258 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 16
- Average first fall frost
- Nov 29
- Growing season
- 258 days
Safer after Apr 15 (1-in-10 risk)
Possible by Nov 1 (1-in-10 risk)
First frost typically in 27 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 29 · Apr 24 · May 11 | Oct 12 · Nov 1 · Nov 26 | 194 days | 100% |
| Frost / freeze (32°F) | Feb 6 · Mar 16 · Apr 15 | Nov 1 · Nov 29 · Jan 4 | 258 days | 100% |
| Hard freeze (28°F) | Dec 12 · Jan 29 · Mar 6 | Nov 17 · Dec 21 · Feb 15 | 334 days | 75% |
Planting calendar for Sixes
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 13 – Apr 21 |
| Tomatoes | Transplant outdoors | Apr 1 – Aug 9 |
| Peppers | Start seeds indoors | Feb 13 – Mar 16 |
| Peppers | Transplant outdoors | Apr 15 – May 16 |
| Eggplant | Start seeds indoors | Mar 2 – Mar 31 |
| Eggplant | Transplant outdoors | Apr 15 – May 16 |
| Cucumbers | Sow outdoors | Apr 15 – Aug 19 |
| Summer squash | Sow outdoors | Apr 1 – May 16 |
| Winter squash & pumpkins | Sow outdoors | Apr 15 – May 16 |
| Snap beans | Sow outdoors | Apr 1 – Sep 11 |
| Sweet corn | Sow outdoors | Apr 1 – Aug 9 |
| Watermelon & cantaloupe | Sow outdoors | Apr 15 – May 16 |
| Okra | Sow outdoors | Apr 8 – May 1 |
| Peas | Sow outdoors (spring) | Feb 13 – Mar 31 |
| Potatoes | Plant outdoors (spring) | Feb 13 – Apr 15 |
| Onions | Start seeds indoors (spring) | Jan 2 – Jan 29 |
| Onions | Transplant outdoors (spring) | Mar 2 – Mar 31 |
| Broccoli | Start seeds indoors (spring) | Jan 26 – Mar 1 |
| Broccoli | Transplant outdoors (spring) | Mar 2 – Mar 31 |
| Broccoli | Start seeds indoors (fall) | Jul 30 – Aug 9 |
| Broccoli | Transplant outdoors (fall) | Aug 29 – Sep 9 |
| Cabbage | Start seeds indoors (spring) | Jan 16 – Feb 13 |
| Cabbage | Transplant outdoors (spring) | Feb 13 – Mar 16 |
| Cabbage | Start seeds indoors (fall) | Jul 20 – Aug 19 |
| Cabbage | Transplant outdoors (fall) | Aug 19 – Sep 19 |
| Leaf lettuce | Sow outdoors (spring) | Feb 13 – May 1 |
| Leaf lettuce | Sow outdoors (fall) | Aug 19 – Oct 5 |
| Spinach | Sow outdoors (spring) | Feb 6 – Mar 22 |
| Spinach | Sow outdoors (fall) | Sep 5 – Oct 10 |
| Radishes | Sow outdoors (spring) | Feb 13 – Apr 5 |
| Radishes | Sow outdoors (fall) | Aug 19 – Oct 20 |
| Kale | Sow outdoors (spring) | Mar 2 – Mar 22 |
| Kale | Sow outdoors (fall) | Aug 12 – Sep 19 |
| Carrots | Sow outdoors (spring) | Mar 16 – May 1 |
| Carrots | Sow outdoors (fall) | Jul 20 – Sep 4 |
| Garlic | Plant outdoors (fall) | Nov 19 – Dec 20 |
Where these dates come from
ZIP code 97476 is matched to the NOAA station Langlois #2, OR, 11.1 km away, at 90 ft elevation (648 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Langlois #2, OR (used) | 90 ft | Mar 16 | Nov 29 |
| Port Orford #2, OR | 42 ft | Feb 17 | Dec 3 |
| Powers, OR | 230 ft | Mar 21 | Nov 14 |
| Bandon 2 Nne, OR | 23 ft | Mar 9 | Nov 27 |
Frost dates near Sixes
- Port Orford, OR 97465 · last Feb 17, first Dec 3
- Langlois, OR 97450 · last Mar 16, first Nov 29
- Wedderburn, OR 97491 · last Feb 17, first Dec 3
- Ophir, OR 97464 · last Feb 16, first Dec 16
- Bandon, OR 97411 · last Mar 9, first Nov 27
- Powers, OR 97466 · last Mar 21, first Nov 14
- Broadbent, OR 97414 · last Mar 21, first Nov 14
- Myrtle Point, OR 97458 · last Mar 21, first Nov 14
Frequently asked questions
- When is the last frost in Sixes, OR?
- For ZIP code 97476, the average last spring frost (32°F) is March 16, based on NOAA 1991-2020 climate normals for the Langlois #2, OR weather station. There is a 1-in-10 chance of a frost after April 15.
- When is the first frost in Sixes, OR?
- The average first fall frost (32°F) is November 29. There is a 1-in-10 chance of frost by November 1, so tender plants are at risk from that point on.
- How long is the growing season in 97476?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 258 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.