Frost dates for 83543Nezperce, ID
The average last spring frost in Nezperce is May 24 and the average first fall frost is September 20, giving a typical growing season of about 116 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 24
- Average first fall frost
- Sep 20
- Growing season
- 116 days
Safer after Jun 19 (1-in-10 risk)
Possible by Sep 1 (1-in-10 risk)
Last frost typically in 202 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) | — | — | 70 days | 100% |
| Frost / freeze (32°F) | May 6 · May 24 · Jun 19 | Sep 1 · Sep 20 · Oct 5 | 116 days | 100% |
| Hard freeze (28°F) | Apr 19 · May 5 · May 25 | Sep 13 · Oct 2 · Oct 19 | 149 days | 100% |
Planting calendar for Nezperce
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 23 – Jun 29 |
| Tomatoes | Transplant outdoors | Jun 9 – May 31 |
| Peppers | Start seeds indoors | Apr 23 – May 24 |
| Peppers | Transplant outdoors | Jun 23 – Jul 24 |
| Eggplant | Start seeds indoors | May 10 – Jun 8 |
| Eggplant | Transplant outdoors | Jun 23 – Jul 24 |
| Cucumbers | Sow outdoors | Jun 23 – Jun 10 |
| Summer squash | Sow outdoors | Jun 9 – Jul 24 |
| Winter squash & pumpkins | Sow outdoors | Jun 23 – Jul 24 |
| Snap beans | Sow outdoors | Jun 9 – Jul 3 |
| Sweet corn | Sow outdoors | Jun 9 – May 31 |
| Watermelon & cantaloupe | Sow outdoors | Jun 23 – Jul 24 |
| Okra | Sow outdoors | Jun 16 – Jul 9 |
| Peas | Sow outdoors (spring) | Apr 23 – Jun 8 |
| Potatoes | Plant outdoors (spring) | Apr 23 – Jun 23 |
| Onions | Start seeds indoors (spring) | Mar 12 – Apr 8 |
| Onions | Transplant outdoors (spring) | May 10 – Jun 8 |
| Broccoli | Start seeds indoors (spring) | Apr 5 – May 9 |
| Broccoli | Transplant outdoors (spring) | May 10 – Jun 8 |
| Broccoli | Start seeds indoors (fall) | May 21 – May 31 |
| Broccoli | Transplant outdoors (fall) | Jun 20 – Jul 1 |
| Cabbage | Start seeds indoors (spring) | Mar 26 – Apr 23 |
| Cabbage | Transplant outdoors (spring) | Apr 23 – May 24 |
| Cabbage | Start seeds indoors (fall) | May 11 – Jun 10 |
| Cabbage | Transplant outdoors (fall) | Jun 10 – Jul 11 |
| Leaf lettuce | Sow outdoors (spring) | Apr 23 – Jul 9 |
| Leaf lettuce | Sow outdoors (fall) | Jun 10 – Jul 27 |
| Spinach | Sow outdoors (spring) | Apr 16 – May 30 |
| Spinach | Sow outdoors (fall) | Jun 27 – Aug 1 |
| Radishes | Sow outdoors (spring) | Apr 23 – Jun 13 |
| Radishes | Sow outdoors (fall) | Jun 10 – Aug 11 |
| Kale | Sow outdoors (spring) | May 10 – May 30 |
| Kale | Sow outdoors (fall) | Jun 3 – Jul 11 |
| Carrots | Sow outdoors (spring) | May 24 – Jul 9 |
| Carrots | Sow outdoors (fall) | May 11 – Jun 26 |
| Garlic | Plant outdoors (fall) | Sep 10 – Oct 11 |
Where these dates come from
ZIP code 83543 is matched to the NOAA station Nezperce, ID, 1.7 km away, at 3,248 ft elevation (39 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Nezperce, ID (used) | 3,248 ft | May 24 | Sep 20 |
| Kamiah, ID | 1,210 ft | Apr 29 | Oct 5 |
| Cottonwood 2 Wsw, ID | 3,945 ft | May 6 | Oct 13 |
| Dworshak Fish Hatchery, ID | 995 ft | Apr 20 | Oct 20 |
Frost dates near Nezperce
- Greencreek, ID 83533 · last May 24, first Sep 20
- Kamiah, ID 83536 · last Apr 29, first Oct 5
- Ferdinand, ID 83526 · last May 6, first Oct 13
- Craigmont, ID 83523 · last May 23, first Sep 25
- Reubens, ID 83548 · last May 24, first Sep 20
- Cottonwood, ID 83522 · last May 6, first Oct 13
- Kooskia, ID 83539 · last Apr 16, first Oct 25
- Weippe, ID 83553 · last Jun 3, first Sep 7
Frequently asked questions
- When is the last frost in Nezperce, ID?
- For ZIP code 83543, the average last spring frost (32°F) is May 24, based on NOAA 1991-2020 climate normals for the Nezperce, ID weather station. There is a 1-in-10 chance of a frost after June 19.
- When is the first frost in Nezperce, ID?
- The average first fall frost (32°F) is September 20. There is a 1-in-10 chance of frost by September 1, so tender plants are at risk from that point on.
- How long is the growing season in 83543?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 116 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.