Frost dates for 97826Echo, OR
The average last spring frost in Echo is April 26 and the average first fall frost is October 10, giving a typical growing season of about 167 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 26
- Average first fall frost
- Oct 10
- Growing season
- 167 days
Safer after May 10 (1-in-10 risk)
Possible by Sep 25 (1-in-10 risk)
Last frost typically in 175 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 26 · May 8 · May 22 | Sep 12 · Sep 28 · Oct 12 | 142 days | 100% |
| Frost / freeze (32°F) | Apr 9 · Apr 26 · May 10 | Sep 25 · Oct 10 · Oct 26 | 167 days | 100% |
| Hard freeze (28°F) | Mar 20 · Apr 9 · Apr 29 | Oct 4 · Oct 24 · Nov 7 | 196 days | 100% |
Planting calendar for Echo
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 26 – Jun 1 |
| Tomatoes | Transplant outdoors | May 12 – Jun 20 |
| Peppers | Start seeds indoors | Mar 26 – Apr 26 |
| Peppers | Transplant outdoors | May 26 – Jun 26 |
| Eggplant | Start seeds indoors | Apr 12 – May 11 |
| Eggplant | Transplant outdoors | May 26 – Jun 26 |
| Cucumbers | Sow outdoors | May 26 – Jun 30 |
| Summer squash | Sow outdoors | May 12 – Jun 26 |
| Winter squash & pumpkins | Sow outdoors | May 26 – Jun 26 |
| Snap beans | Sow outdoors | May 12 – Jul 23 |
| Sweet corn | Sow outdoors | May 12 – Jun 20 |
| Watermelon & cantaloupe | Sow outdoors | May 26 – Jun 26 |
| Okra | Sow outdoors | May 19 – Jun 11 |
| Peas | Sow outdoors (spring) | Mar 26 – May 11 |
| Potatoes | Plant outdoors (spring) | Mar 26 – May 26 |
| Onions | Start seeds indoors (spring) | Feb 12 – Mar 11 |
| Onions | Transplant outdoors (spring) | Apr 12 – May 11 |
| Broccoli | Start seeds indoors (spring) | Mar 8 – Apr 11 |
| Broccoli | Transplant outdoors (spring) | Apr 12 – May 11 |
| Broccoli | Start seeds indoors (fall) | Jun 10 – Jun 20 |
| Broccoli | Transplant outdoors (fall) | Jul 10 – Jul 21 |
| Cabbage | Start seeds indoors (spring) | Feb 26 – Mar 26 |
| Cabbage | Transplant outdoors (spring) | Mar 26 – Apr 26 |
| Cabbage | Start seeds indoors (fall) | May 31 – Jun 30 |
| Cabbage | Transplant outdoors (fall) | Jun 30 – Jul 31 |
| Leaf lettuce | Sow outdoors (spring) | Mar 26 – Jun 11 |
| Leaf lettuce | Sow outdoors (fall) | Jun 30 – Aug 16 |
| Spinach | Sow outdoors (spring) | Mar 19 – May 2 |
| Spinach | Sow outdoors (fall) | Jul 17 – Aug 21 |
| Radishes | Sow outdoors (spring) | Mar 26 – May 16 |
| Radishes | Sow outdoors (fall) | Jun 30 – Aug 31 |
| Kale | Sow outdoors (spring) | Apr 12 – May 2 |
| Kale | Sow outdoors (fall) | Jun 23 – Jul 31 |
| Carrots | Sow outdoors (spring) | Apr 26 – Jun 11 |
| Carrots | Sow outdoors (fall) | May 31 – Jul 16 |
| Garlic | Plant outdoors (fall) | Sep 30 – Oct 31 |
Where these dates come from
ZIP code 97826 is matched to the NOAA station Hermiston Muni Ap, OR, 10.7 km away, at 641 ft elevation (1 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Hermiston Muni Ap, OR (used) | 641 ft | Apr 26 | Oct 10 |
| Hermiston 2 Nw, OR | 460 ft | Apr 27 | Oct 7 |
| Mcnary Dam #2, OR | 361 ft | Mar 30 | Nov 4 |
| Mcnary Dam, WA | 361 ft | Mar 27 | Nov 4 |
Frost dates near Echo
- Stanfield, OR 97875 · last Apr 26, first Oct 10
- Hermiston, OR 97838 · last Apr 27, first Oct 7
- Umatilla, OR 97882 · last Apr 27, first Oct 7
- Plymouth, WA 99346 · last Mar 27, first Nov 4
- Irrigon, OR 97844 · last Apr 14, first Oct 21
- Pendleton, OR 97801 · last Apr 14, first Oct 22
- Helix, OR 97835 · last May 12, first Sep 27
- Boardman, OR 97818 · last Apr 14, first Oct 21
Frequently asked questions
- When is the last frost in Echo, OR?
- For ZIP code 97826, the average last spring frost (32°F) is April 26, based on NOAA 1991-2020 climate normals for the Hermiston Muni Ap, OR weather station. There is a 1-in-10 chance of a frost after May 10.
- When is the first frost in Echo, OR?
- The average first fall frost (32°F) is October 10. There is a 1-in-10 chance of frost by September 25, so tender plants are at risk from that point on.
- How long is the growing season in 97826?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 167 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.