Frost dates for 83346Oakley, ID
The average last spring frost in Oakley is May 15 and the average first fall frost is October 2, giving a typical growing season of about 137 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 15
- Average first fall frost
- Oct 2
- Growing season
- 137 days
Safer after Jun 6 (1-in-10 risk)
Possible by Sep 16 (1-in-10 risk)
Last frost typically in 200 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 16 · Jun 2 · Jun 19 | Sep 5 · Sep 22 · Oct 6 | 110 days | 100% |
| Frost / freeze (32°F) | Apr 30 · May 15 · Jun 6 | Sep 16 · Oct 2 · Oct 17 | 137 days | 100% |
| Hard freeze (28°F) | Apr 13 · Apr 30 · May 15 | Sep 30 · Oct 16 · Nov 1 | 170 days | 100% |
Planting calendar for Oakley
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 14 – Jun 20 |
| Tomatoes | Transplant outdoors | May 31 – Jun 12 |
| Peppers | Start seeds indoors | Apr 14 – May 15 |
| Peppers | Transplant outdoors | Jun 14 – Jul 15 |
| Eggplant | Start seeds indoors | May 1 – May 30 |
| Eggplant | Transplant outdoors | Jun 14 – Jul 15 |
| Cucumbers | Sow outdoors | Jun 14 – Jun 22 |
| Summer squash | Sow outdoors | May 31 – Jul 15 |
| Winter squash & pumpkins | Sow outdoors | Jun 14 – Jul 15 |
| Snap beans | Sow outdoors | May 31 – Jul 15 |
| Sweet corn | Sow outdoors | May 31 – Jun 12 |
| Watermelon & cantaloupe | Sow outdoors | Jun 14 – Jul 15 |
| Okra | Sow outdoors | Jun 7 – Jun 30 |
| Peas | Sow outdoors (spring) | Apr 14 – May 30 |
| Potatoes | Plant outdoors (spring) | Apr 14 – Jun 14 |
| Onions | Start seeds indoors (spring) | Mar 3 – Mar 30 |
| Onions | Transplant outdoors (spring) | May 1 – May 30 |
| Broccoli | Start seeds indoors (spring) | Mar 27 – Apr 30 |
| Broccoli | Transplant outdoors (spring) | May 1 – May 30 |
| Broccoli | Start seeds indoors (fall) | Jun 2 – Jun 12 |
| Broccoli | Transplant outdoors (fall) | Jul 2 – Jul 13 |
| Cabbage | Start seeds indoors (spring) | Mar 17 – Apr 14 |
| Cabbage | Transplant outdoors (spring) | Apr 14 – May 15 |
| Cabbage | Start seeds indoors (fall) | May 23 – Jun 22 |
| Cabbage | Transplant outdoors (fall) | Jun 22 – Jul 23 |
| Leaf lettuce | Sow outdoors (spring) | Apr 14 – Jun 30 |
| Leaf lettuce | Sow outdoors (fall) | Jun 22 – Aug 8 |
| Spinach | Sow outdoors (spring) | Apr 7 – May 21 |
| Spinach | Sow outdoors (fall) | Jul 9 – Aug 13 |
| Radishes | Sow outdoors (spring) | Apr 14 – Jun 4 |
| Radishes | Sow outdoors (fall) | Jun 22 – Aug 23 |
| Kale | Sow outdoors (spring) | May 1 – May 21 |
| Kale | Sow outdoors (fall) | Jun 15 – Jul 23 |
| Carrots | Sow outdoors (spring) | May 15 – Jun 30 |
| Carrots | Sow outdoors (fall) | May 23 – Jul 8 |
| Garlic | Plant outdoors (fall) | Sep 22 – Oct 23 |
Where these dates come from
ZIP code 83346 is matched to the NOAA station Oakley, ID, 5 km away, at 4,559 ft elevation (343 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Oakley, ID (used) | 4,559 ft | May 15 | Oct 2 |
| Burley Muni Ap, ID | 4,142 ft | May 7 | Oct 4 |
| Malta, ID | 4,521 ft | Jun 5 | Sep 13 |
| Paul 1Ene, ID | 4,150 ft | May 6 | Oct 6 |
Frost dates near Oakley
- Almo, ID 83312 · last Jun 4, first Sep 17
- Albion, ID 83311 · last Jun 5, first Sep 13
- Burley, ID 83318 · last May 7, first Oct 4
- Murtaugh, ID 83344 · last May 7, first Oct 5
- Malta, ID 83342 · last Jun 5, first Sep 13
- Heyburn, ID 83336 · last May 7, first Oct 4
- Paul, ID 83347 · last May 6, first Oct 6
- Hazelton, ID 83335 · last May 7, first Oct 5
Frequently asked questions
- When is the last frost in Oakley, ID?
- For ZIP code 83346, the average last spring frost (32°F) is May 15, based on NOAA 1991-2020 climate normals for the Oakley, ID weather station. There is a 1-in-10 chance of a frost after June 6.
- When is the first frost in Oakley, ID?
- The average first fall frost (32°F) is October 2. 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 83346?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 137 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.