Frost dates for 83333Hailey, ID
The average last spring frost in Hailey is May 13 and the average first fall frost is October 2, giving a typical growing season of about 139 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 13
- Average first fall frost
- Oct 2
- Growing season
- 139 days
Safer after Jun 3 (1-in-10 risk)
Possible by Sep 15 (1-in-10 risk)
Last frost typically in 198 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 15 · Jun 2 · Jun 22 | Sep 3 · Sep 20 · Oct 4 | 106 days | 100% |
| Frost / freeze (32°F) | Apr 30 · May 13 · Jun 3 | Sep 15 · Oct 2 · Oct 17 | 139 days | 100% |
| Hard freeze (28°F) | Apr 12 · Apr 28 · May 11 | Sep 30 · Oct 14 · Oct 30 | 169 days | 100% |
Planting calendar for Hailey
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 12 – Jun 18 |
| Tomatoes | Transplant outdoors | May 29 – Jun 12 |
| Peppers | Start seeds indoors | Apr 12 – May 13 |
| Peppers | Transplant outdoors | Jun 12 – Jul 13 |
| Eggplant | Start seeds indoors | Apr 29 – May 28 |
| Eggplant | Transplant outdoors | Jun 12 – Jul 13 |
| Cucumbers | Sow outdoors | Jun 12 – Jun 22 |
| Summer squash | Sow outdoors | May 29 – Jul 13 |
| Winter squash & pumpkins | Sow outdoors | Jun 12 – Jul 13 |
| Snap beans | Sow outdoors | May 29 – Jul 15 |
| Sweet corn | Sow outdoors | May 29 – Jun 12 |
| Watermelon & cantaloupe | Sow outdoors | Jun 12 – Jul 13 |
| Okra | Sow outdoors | Jun 5 – Jun 28 |
| Peas | Sow outdoors (spring) | Apr 12 – May 28 |
| Potatoes | Plant outdoors (spring) | Apr 12 – Jun 12 |
| Onions | Start seeds indoors (spring) | Mar 1 – Mar 28 |
| Onions | Transplant outdoors (spring) | Apr 29 – May 28 |
| Broccoli | Start seeds indoors (spring) | Mar 25 – Apr 28 |
| Broccoli | Transplant outdoors (spring) | Apr 29 – May 28 |
| Broccoli | Start seeds indoors (fall) | Jun 2 – Jun 12 |
| Broccoli | Transplant outdoors (fall) | Jul 2 – Jul 13 |
| Cabbage | Start seeds indoors (spring) | Mar 15 – Apr 12 |
| Cabbage | Transplant outdoors (spring) | Apr 12 – May 13 |
| Cabbage | Start seeds indoors (fall) | May 23 – Jun 22 |
| Cabbage | Transplant outdoors (fall) | Jun 22 – Jul 23 |
| Leaf lettuce | Sow outdoors (spring) | Apr 12 – Jun 28 |
| Leaf lettuce | Sow outdoors (fall) | Jun 22 – Aug 8 |
| Spinach | Sow outdoors (spring) | Apr 5 – May 19 |
| Spinach | Sow outdoors (fall) | Jul 9 – Aug 13 |
| Radishes | Sow outdoors (spring) | Apr 12 – Jun 2 |
| Radishes | Sow outdoors (fall) | Jun 22 – Aug 23 |
| Kale | Sow outdoors (spring) | Apr 29 – May 19 |
| Kale | Sow outdoors (fall) | Jun 15 – Jul 23 |
| Carrots | Sow outdoors (spring) | May 13 – Jun 28 |
| Carrots | Sow outdoors (fall) | May 23 – Jul 8 |
| Garlic | Plant outdoors (fall) | Sep 22 – Oct 23 |
Where these dates come from
ZIP code 83333 is matched to the NOAA station Bellevue, ID, 7.5 km away, at 5,192 ft elevation (159 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Bellevue, ID (used) | 5,192 ft | May 13 | Oct 2 |
| Ketchum Rs, ID | 5,890 ft | — | — |
| Picabo, ID | 4,839 ft | Jun 16 | Sep 9 |
| Fairfield Rs, ID | 5,065 ft | Jun 8 | Sep 14 |
Frost dates near Hailey
- Sun Valley, ID 83354 · last —, first —
- Bellevue, ID 83313 · last May 13, first Oct 2
- Ketchum, ID 83340 · last —, first —
- Picabo, ID 83348 · last Jun 16, first Sep 9
- Corral, ID 83322 · last —, first —
- Fairfield, ID 83327 · last Jun 8, first Sep 14
- Carey, ID 83320 · last Jun 16, first Sep 9
- Richfield, ID 83349 · last May 24, first Sep 26
Frequently asked questions
- When is the last frost in Hailey, ID?
- For ZIP code 83333, the average last spring frost (32°F) is May 13, based on NOAA 1991-2020 climate normals for the Bellevue, ID weather station. There is a 1-in-10 chance of a frost after June 3.
- When is the first frost in Hailey, ID?
- The average first fall frost (32°F) is October 2. There is a 1-in-10 chance of frost by September 15, so tender plants are at risk from that point on.
- How long is the growing season in 83333?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 139 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.