Frost dates for 83244Howe, ID
The average last spring frost in Howe is May 24 and the average first fall frost is September 14, giving a typical growing season of about 113 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 24
- Average first fall frost
- Sep 14
- Growing season
- 113 days
Safer after Jun 14 (1-in-10 risk)
Possible by Sep 1 (1-in-10 risk)
Last frost typically in 209 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 24 · Jun 11 · Jul 2 | Aug 20 · Sep 3 · Sep 16 | 82 days | 100% |
| Frost / freeze (32°F) | May 6 · May 24 · Jun 14 | Sep 1 · Sep 14 · Sep 28 | 113 days | 100% |
| Hard freeze (28°F) | Apr 20 · May 5 · May 26 | Sep 10 · Sep 25 · Oct 13 | 141 days | 100% |
Planting calendar for Howe
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 25 |
| 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 4 |
| Summer squash | Sow outdoors | Jun 9 – Jul 24 |
| Winter squash & pumpkins | Sow outdoors | Jun 23 – Jul 24 |
| Snap beans | Sow outdoors | Jun 9 – Jun 27 |
| Sweet corn | Sow outdoors | Jun 9 – May 25 |
| 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 15 – May 25 |
| Broccoli | Transplant outdoors (fall) | Jun 14 – Jun 25 |
| Cabbage | Start seeds indoors (spring) | Mar 26 – Apr 23 |
| Cabbage | Transplant outdoors (spring) | Apr 23 – May 24 |
| Cabbage | Start seeds indoors (fall) | May 5 – Jun 4 |
| Cabbage | Transplant outdoors (fall) | Jun 4 – Jul 5 |
| Leaf lettuce | Sow outdoors (spring) | Apr 23 – Jul 9 |
| Leaf lettuce | Sow outdoors (fall) | Jun 4 – Jul 21 |
| Spinach | Sow outdoors (spring) | Apr 16 – May 30 |
| Spinach | Sow outdoors (fall) | Jun 21 – Jul 26 |
| Radishes | Sow outdoors (spring) | Apr 23 – Jun 13 |
| Radishes | Sow outdoors (fall) | Jun 4 – Aug 5 |
| Kale | Sow outdoors (spring) | May 10 – May 30 |
| Kale | Sow outdoors (fall) | May 28 – Jul 5 |
| Carrots | Sow outdoors (spring) | May 24 – Jul 9 |
| Carrots | Sow outdoors (fall) | May 5 – Jun 20 |
| Garlic | Plant outdoors (fall) | Sep 4 – Oct 5 |
Where these dates come from
ZIP code 83244 is matched to the NOAA station Howe, ID, 15.6 km away, at 4,820 ft elevation (292 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Howe, ID (used) | 4,820 ft | May 24 | Sep 14 |
| Arco, ID | 5,325 ft | May 22 | Sep 22 |
| Mackay Lost Rvr Rs, ID | 5,897 ft | Jun 1 | Sep 20 |
| Idaho Falls 46 W, ID | 4,938 ft | Jun 11 | Sep 6 |
Frost dates near Howe
- Moore, ID 83255 · last Jun 14, first Sep 8
- Arco, ID 83213 · last May 22, first Sep 22
- Monteview, ID 83435 · last Jun 12, first Sep 7
- Mackay, ID 83251 · last Jun 1, first Sep 20
- Terreton, ID 83450 · last Jun 3, first Sep 11
- Atomic City, ID 83215 · last Jun 11, first Sep 6
- Dubois, ID 83423 · last May 18, first Sep 30
- Hamer, ID 83425 · last Jun 3, first Sep 11
Frequently asked questions
- When is the last frost in Howe, ID?
- For ZIP code 83244, the average last spring frost (32°F) is May 24, based on NOAA 1991-2020 climate normals for the Howe, ID weather station. There is a 1-in-10 chance of a frost after June 14.
- When is the first frost in Howe, ID?
- The average first fall frost (32°F) is September 14. 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 83244?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 113 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.