Frost dates for 83210Aberdeen, ID
The average last spring frost in Aberdeen is May 21 and the average first fall frost is September 20, giving a typical growing season of about 118 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 21
- Average first fall frost
- Sep 20
- Growing season
- 118 days
Safer after Jun 13 (1-in-10 risk)
Possible by Sep 2 (1-in-10 risk)
Last frost typically in 199 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 23 · Jun 12 · Jun 28 | Aug 21 · Sep 5 · Sep 22 | 85 days | 100% |
| Frost / freeze (32°F) | May 4 · May 21 · Jun 13 | Sep 2 · Sep 20 · Oct 4 | 118 days | 100% |
| Hard freeze (28°F) | Apr 20 · May 3 · May 17 | Sep 15 · Oct 1 · Oct 17 | 149 days | 100% |
Planting calendar for Aberdeen
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 20 – Jun 26 |
| Tomatoes | Transplant outdoors | Jun 6 – May 31 |
| Peppers | Start seeds indoors | Apr 20 – May 21 |
| Peppers | Transplant outdoors | Jun 20 – Jul 21 |
| Eggplant | Start seeds indoors | May 7 – Jun 5 |
| Eggplant | Transplant outdoors | Jun 20 – Jul 21 |
| Cucumbers | Sow outdoors | Jun 20 – Jun 10 |
| Summer squash | Sow outdoors | Jun 6 – Jul 21 |
| Winter squash & pumpkins | Sow outdoors | Jun 20 – Jul 21 |
| Snap beans | Sow outdoors | Jun 6 – Jul 3 |
| Sweet corn | Sow outdoors | Jun 6 – May 31 |
| Watermelon & cantaloupe | Sow outdoors | Jun 20 – Jul 21 |
| Okra | Sow outdoors | Jun 13 – Jul 6 |
| Peas | Sow outdoors (spring) | Apr 20 – Jun 5 |
| Potatoes | Plant outdoors (spring) | Apr 20 – Jun 20 |
| Onions | Start seeds indoors (spring) | Mar 9 – Apr 5 |
| Onions | Transplant outdoors (spring) | May 7 – Jun 5 |
| Broccoli | Start seeds indoors (spring) | Apr 2 – May 6 |
| Broccoli | Transplant outdoors (spring) | May 7 – Jun 5 |
| Broccoli | Start seeds indoors (fall) | May 21 – May 31 |
| Broccoli | Transplant outdoors (fall) | Jun 20 – Jul 1 |
| Cabbage | Start seeds indoors (spring) | Mar 23 – Apr 20 |
| Cabbage | Transplant outdoors (spring) | Apr 20 – May 21 |
| Cabbage | Start seeds indoors (fall) | May 11 – Jun 10 |
| Cabbage | Transplant outdoors (fall) | Jun 10 – Jul 11 |
| Leaf lettuce | Sow outdoors (spring) | Apr 20 – Jul 6 |
| Leaf lettuce | Sow outdoors (fall) | Jun 10 – Jul 27 |
| Spinach | Sow outdoors (spring) | Apr 13 – May 27 |
| Spinach | Sow outdoors (fall) | Jun 27 – Aug 1 |
| Radishes | Sow outdoors (spring) | Apr 20 – Jun 10 |
| Radishes | Sow outdoors (fall) | Jun 10 – Aug 11 |
| Kale | Sow outdoors (spring) | May 7 – May 27 |
| Kale | Sow outdoors (fall) | Jun 3 – Jul 11 |
| Carrots | Sow outdoors (spring) | May 21 – Jul 6 |
| Carrots | Sow outdoors (fall) | May 11 – Jun 26 |
| Garlic | Plant outdoors (fall) | Sep 10 – Oct 11 |
Where these dates come from
ZIP code 83210 is matched to the NOAA station Aberdeen Exp Stn, ID, 5.8 km away, at 4,405 ft elevation (47 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Aberdeen Exp Stn, ID (used) | 4,405 ft | May 21 | Sep 20 |
| American Falls 6 Ne, ID | 4,415 ft | May 14 | Oct 2 |
| American Falls, ID | 4,510 ft | May 4 | Oct 8 |
| Pocatello Rgnl Ap, ID | 4,478 ft | May 23 | Sep 18 |
Frost dates near Aberdeen
- Springfield, ID 83277 · last May 21, first Sep 20
- Pingree, ID 83262 · last May 20, first Sep 20
- Pocatello, ID 83202 · last May 2, first Oct 11
- Fort Hall, ID 83203 · last May 20, first Sep 20
- Moreland, ID 83256 · last May 5, first Oct 3
- American Falls, ID 83211 · last May 20, first Sep 26
- Blackfoot, ID 83221 · last May 5, first Oct 3
- Atomic City, ID 83215 · last Jun 11, first Sep 6
Frequently asked questions
- When is the last frost in Aberdeen, ID?
- For ZIP code 83210, the average last spring frost (32°F) is May 21, based on NOAA 1991-2020 climate normals for the Aberdeen Exp Stn, ID weather station. There is a 1-in-10 chance of a frost after June 13.
- When is the first frost in Aberdeen, ID?
- The average first fall frost (32°F) is September 20. There is a 1-in-10 chance of frost by September 2, so tender plants are at risk from that point on.
- How long is the growing season in 83210?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 118 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.