Frost dates for 97122Hebo, OR
The average last spring frost in Hebo is March 17 and the average first fall frost is November 22, giving a typical growing season of about 251 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 17
- Average first fall frost
- Nov 22
- Growing season
- 251 days
Safer after Apr 15 (1-in-10 risk)
Possible by Oct 26 (1-in-10 risk)
First frost typically in 21 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 27 · May 15 | Oct 2 · Oct 26 · Nov 21 | 183 days | 100% |
| Frost / freeze (32°F) | Feb 9 · Mar 17 · Apr 15 | Oct 26 · Nov 22 · Dec 31 | 251 days | 100% |
| Hard freeze (28°F) | Dec 3 · Jan 25 · Feb 28 | Nov 8 · Dec 13 · Feb 14 | 332 days | 74% |
Planting calendar for Hebo
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 14 – Apr 22 |
| Tomatoes | Transplant outdoors | Apr 2 – Aug 2 |
| Peppers | Start seeds indoors | Feb 14 – Mar 17 |
| Peppers | Transplant outdoors | Apr 16 – May 17 |
| Eggplant | Start seeds indoors | Mar 3 – Apr 1 |
| Eggplant | Transplant outdoors | Apr 16 – May 17 |
| Cucumbers | Sow outdoors | Apr 16 – Aug 12 |
| Summer squash | Sow outdoors | Apr 2 – May 17 |
| Winter squash & pumpkins | Sow outdoors | Apr 16 – May 17 |
| Snap beans | Sow outdoors | Apr 2 – Sep 4 |
| Sweet corn | Sow outdoors | Apr 2 – Aug 2 |
| Watermelon & cantaloupe | Sow outdoors | Apr 16 – May 17 |
| Okra | Sow outdoors | Apr 9 – May 2 |
| Peas | Sow outdoors (spring) | Feb 14 – Apr 1 |
| Potatoes | Plant outdoors (spring) | Feb 14 – Apr 16 |
| Onions | Start seeds indoors (spring) | Jan 3 – Jan 30 |
| Onions | Transplant outdoors (spring) | Mar 3 – Apr 1 |
| Broccoli | Start seeds indoors (spring) | Jan 27 – Mar 2 |
| Broccoli | Transplant outdoors (spring) | Mar 3 – Apr 1 |
| Broccoli | Start seeds indoors (fall) | Jul 23 – Aug 2 |
| Broccoli | Transplant outdoors (fall) | Aug 22 – Sep 2 |
| Cabbage | Start seeds indoors (spring) | Jan 17 – Feb 14 |
| Cabbage | Transplant outdoors (spring) | Feb 14 – Mar 17 |
| Cabbage | Start seeds indoors (fall) | Jul 13 – Aug 12 |
| Cabbage | Transplant outdoors (fall) | Aug 12 – Sep 12 |
| Leaf lettuce | Sow outdoors (spring) | Feb 14 – May 2 |
| Leaf lettuce | Sow outdoors (fall) | Aug 12 – Sep 28 |
| Spinach | Sow outdoors (spring) | Feb 7 – Mar 23 |
| Spinach | Sow outdoors (fall) | Aug 29 – Oct 3 |
| Radishes | Sow outdoors (spring) | Feb 14 – Apr 6 |
| Radishes | Sow outdoors (fall) | Aug 12 – Oct 13 |
| Kale | Sow outdoors (spring) | Mar 3 – Mar 23 |
| Kale | Sow outdoors (fall) | Aug 5 – Sep 12 |
| Carrots | Sow outdoors (spring) | Mar 17 – May 2 |
| Carrots | Sow outdoors (fall) | Jul 13 – Aug 28 |
| Garlic | Plant outdoors (fall) | Nov 12 – Dec 13 |
Where these dates come from
ZIP code 97122 is matched to the NOAA station Cloverdale, OR, 4.8 km away, at 12 ft elevation (1,277 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Cloverdale, OR (used) | 12 ft | Mar 17 | Nov 22 |
| Otis 2 Ne, OR | 150 ft | Apr 4 | Nov 16 |
| Tillamook 6Se, OR | 140 ft | Apr 5 | Nov 4 |
| Tillamook, OR | 12 ft | Apr 22 | Oct 21 |
Frost dates near Hebo
- Pacific City, OR 97135 · last Mar 17, first Nov 22
- Beaver, OR 97108 · last Mar 17, first Nov 22
- Neskowin, OR 97149 · last Apr 4, first Nov 16
- Cloverdale, OR 97112 · last Mar 17, first Nov 22
- Otis, OR 97368 · last Apr 4, first Nov 16
- Grand Ronde, OR 97347 · last Apr 18, first Nov 7
- Neotsu, OR 97364 · last Apr 4, first Nov 16
- Willamina, OR 97396 · last Apr 16, first Nov 1
Frequently asked questions
- When is the last frost in Hebo, OR?
- For ZIP code 97122, the average last spring frost (32°F) is March 17, based on NOAA 1991-2020 climate normals for the Cloverdale, OR weather station. There is a 1-in-10 chance of a frost after April 15.
- When is the first frost in Hebo, OR?
- The average first fall frost (32°F) is November 22. There is a 1-in-10 chance of frost by October 26, so tender plants are at risk from that point on.
- How long is the growing season in 97122?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 251 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.