Frost dates for 83332Hagerman, ID
The average last spring frost in Hagerman is May 3 and the average first fall frost is October 1, giving a typical growing season of about 151 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 3
- Average first fall frost
- Oct 1
- Growing season
- 151 days
Safer after May 17 (1-in-10 risk)
Possible by Sep 16 (1-in-10 risk)
Last frost typically in 181 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 4 · May 19 · Jun 9 | Sep 4 · Sep 19 · Oct 4 | 121 days | 100% |
| Frost / freeze (32°F) | Apr 19 · May 3 · May 17 | Sep 16 · Oct 1 · Oct 16 | 151 days | 100% |
| Hard freeze (28°F) | Apr 3 · Apr 19 · May 3 | Sep 29 · Oct 15 · Oct 31 | 177 days | 100% |
Planting calendar for Hagerman
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 2 – Jun 8 |
| Tomatoes | Transplant outdoors | May 19 – Jun 11 |
| Peppers | Start seeds indoors | Apr 2 – May 3 |
| Peppers | Transplant outdoors | Jun 2 – Jul 3 |
| Eggplant | Start seeds indoors | Apr 19 – May 18 |
| Eggplant | Transplant outdoors | Jun 2 – Jul 3 |
| Cucumbers | Sow outdoors | Jun 2 – Jun 21 |
| Summer squash | Sow outdoors | May 19 – Jul 3 |
| Winter squash & pumpkins | Sow outdoors | Jun 2 – Jul 3 |
| Snap beans | Sow outdoors | May 19 – Jul 14 |
| Sweet corn | Sow outdoors | May 19 – Jun 11 |
| Watermelon & cantaloupe | Sow outdoors | Jun 2 – Jul 3 |
| Okra | Sow outdoors | May 26 – Jun 18 |
| Peas | Sow outdoors (spring) | Apr 2 – May 18 |
| Potatoes | Plant outdoors (spring) | Apr 2 – Jun 2 |
| Onions | Start seeds indoors (spring) | Feb 19 – Mar 18 |
| Onions | Transplant outdoors (spring) | Apr 19 – May 18 |
| Broccoli | Start seeds indoors (spring) | Mar 15 – Apr 18 |
| Broccoli | Transplant outdoors (spring) | Apr 19 – May 18 |
| Broccoli | Start seeds indoors (fall) | Jun 1 – Jun 11 |
| Broccoli | Transplant outdoors (fall) | Jul 1 – Jul 12 |
| Cabbage | Start seeds indoors (spring) | Mar 5 – Apr 2 |
| Cabbage | Transplant outdoors (spring) | Apr 2 – May 3 |
| Cabbage | Start seeds indoors (fall) | May 22 – Jun 21 |
| Cabbage | Transplant outdoors (fall) | Jun 21 – Jul 22 |
| Leaf lettuce | Sow outdoors (spring) | Apr 2 – Jun 18 |
| Leaf lettuce | Sow outdoors (fall) | Jun 21 – Aug 7 |
| Spinach | Sow outdoors (spring) | Mar 26 – May 9 |
| Spinach | Sow outdoors (fall) | Jul 8 – Aug 12 |
| Radishes | Sow outdoors (spring) | Apr 2 – May 23 |
| Radishes | Sow outdoors (fall) | Jun 21 – Aug 22 |
| Kale | Sow outdoors (spring) | Apr 19 – May 9 |
| Kale | Sow outdoors (fall) | Jun 14 – Jul 22 |
| Carrots | Sow outdoors (spring) | May 3 – Jun 18 |
| Carrots | Sow outdoors (fall) | May 22 – Jul 7 |
| Garlic | Plant outdoors (fall) | Sep 21 – Oct 22 |
Where these dates come from
ZIP code 83332 is matched to the NOAA station Hagerman 2 Sw, ID, 3 km away, at 2,897 ft elevation (174 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Hagerman 2 Sw, ID (used) | 2,897 ft | May 3 | Oct 1 |
| Buhl #2, ID | 3,800 ft | Apr 25 | Oct 15 |
| Castleford 2 N, ID | 3,825 ft | May 17 | Sep 29 |
| Jerome, ID | 3,740 ft | May 2 | Oct 14 |
Frost dates near Hagerman
- Bliss, ID 83314 · last May 3, first Oct 1
- Wendell, ID 83355 · last May 2, first Oct 14
- Gooding, ID 83330 · last May 2, first Oct 14
- Buhl, ID 83316 · last Apr 25, first Oct 15
- King Hill, ID 83633 · last May 1, first Oct 3
- Castleford, ID 83321 · last May 17, first Sep 29
- Jerome, ID 83338 · last May 2, first Oct 14
- Filer, ID 83328 · last Apr 25, first Oct 15
Frequently asked questions
- When is the last frost in Hagerman, ID?
- For ZIP code 83332, the average last spring frost (32°F) is May 3, based on NOAA 1991-2020 climate normals for the Hagerman 2 Sw, ID weather station. There is a 1-in-10 chance of a frost after May 17.
- When is the first frost in Hagerman, ID?
- The average first fall frost (32°F) is October 1. There is a 1-in-10 chance of frost by September 16, so tender plants are at risk from that point on.
- How long is the growing season in 83332?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 151 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.