Frost dates for 97736Frenchglen, OR
The average last spring frost in Frenchglen is May 10 and the average first fall frost is October 7, giving a typical growing season of about 145 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 10
- Average first fall frost
- Oct 7
- Growing season
- 145 days
Safer after Jun 3 (1-in-10 risk)
Possible by Sep 21 (1-in-10 risk)
Last frost typically in 189 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) | May 11 · Jun 4 · Jun 21 | Sep 8 · Sep 25 · Oct 9 | 113 days | 100% |
| Frost / freeze (32°F) | Apr 25 · May 10 · Jun 3 | Sep 21 · Oct 7 · Oct 21 | 145 days | 100% |
| Hard freeze (28°F) | Apr 9 · Apr 27 · May 15 | Oct 4 · Oct 19 · Nov 3 | 174 days | 100% |
Planting calendar for Frenchglen
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 | Apr 9 – Jun 15 |
| Tomatoes | Transplant outdoors | May 26 – Jun 17 |
| Peppers | Start seeds indoors | Apr 9 – May 10 |
| Peppers | Transplant outdoors | Jun 9 – Jul 10 |
| Eggplant | Start seeds indoors | Apr 26 – May 25 |
| Eggplant | Transplant outdoors | Jun 9 – Jul 10 |
| Cucumbers | Sow outdoors | Jun 9 – Jun 27 |
| Summer squash | Sow outdoors | May 26 – Jul 10 |
| Winter squash & pumpkins | Sow outdoors | Jun 9 – Jul 10 |
| Snap beans | Sow outdoors | May 26 – Jul 20 |
| Sweet corn | Sow outdoors | May 26 – Jun 17 |
| Watermelon & cantaloupe | Sow outdoors | Jun 9 – Jul 10 |
| Okra | Sow outdoors | Jun 2 – Jun 25 |
| Peas | Sow outdoors (spring) | Apr 9 – May 25 |
| Potatoes | Plant outdoors (spring) | Apr 9 – Jun 9 |
| Onions | Start seeds indoors (spring) | Feb 26 – Mar 25 |
| Onions | Transplant outdoors (spring) | Apr 26 – May 25 |
| Broccoli | Start seeds indoors (spring) | Mar 22 – Apr 25 |
| Broccoli | Transplant outdoors (spring) | Apr 26 – May 25 |
| Broccoli | Start seeds indoors (fall) | Jun 7 – Jun 17 |
| Broccoli | Transplant outdoors (fall) | Jul 7 – Jul 18 |
| Cabbage | Start seeds indoors (spring) | Mar 12 – Apr 9 |
| Cabbage | Transplant outdoors (spring) | Apr 9 – May 10 |
| Cabbage | Start seeds indoors (fall) | May 28 – Jun 27 |
| Cabbage | Transplant outdoors (fall) | Jun 27 – Jul 28 |
| Leaf lettuce | Sow outdoors (spring) | Apr 9 – Jun 25 |
| Leaf lettuce | Sow outdoors (fall) | Jun 27 – Aug 13 |
| Spinach | Sow outdoors (spring) | Apr 2 – May 16 |
| Spinach | Sow outdoors (fall) | Jul 14 – Aug 18 |
| Radishes | Sow outdoors (spring) | Apr 9 – May 30 |
| Radishes | Sow outdoors (fall) | Jun 27 – Aug 28 |
| Kale | Sow outdoors (spring) | Apr 26 – May 16 |
| Kale | Sow outdoors (fall) | Jun 20 – Jul 28 |
| Carrots | Sow outdoors (spring) | May 10 – Jun 25 |
| Carrots | Sow outdoors (fall) | May 28 – Jul 13 |
| Garlic | Plant outdoors (fall) | Sep 27 – Oct 28 |
Where these dates come from
ZIP code 97736 is matched to the NOAA station Fields, OR, 56.9 km away, at 4,227 ft elevation (507 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Fields, OR (used) | 4,227 ft | May 10 | Oct 7 |
| Hart Mtn Refuge, OR | 5,618 ft | — | — |
| Malheur Refuge Hq, OR | 4,118 ft | May 29 | Sep 18 |
| O O Rch, OR | 4,136 ft | Jun 11 | Sep 6 |
Frost dates near Frenchglen
- Princeton, OR 97721 · last Jun 11, first Sep 6
- Diamond, OR 97722 · last May 29, first Sep 18
- Fields, OR 97710 · last May 10, first Oct 7
- Plush, OR 97637 · last Jun 6, first Sep 14
- Denio, NV 89404 · last May 30, first Sep 18
- Burns, OR 97720 · last Jun 11, first Sep 6
- Crane, OR 97732 · last Jun 11, first Sep 6
- Hines, OR 97738 · last Jun 11, first Sep 6
Frequently asked questions
- When is the last frost in Frenchglen, OR?
- For ZIP code 97736, the average last spring frost (32°F) is May 10, based on NOAA 1991-2020 climate normals for the Fields, OR weather station. There is a 1-in-10 chance of a frost after June 3.
- When is the first frost in Frenchglen, OR?
- The average first fall frost (32°F) is October 7. There is a 1-in-10 chance of frost by September 21, so tender plants are at risk from that point on.
- How long is the growing season in 97736?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 145 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.