Fall in zone 7aPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 83650 (Murphy, ID)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Silver City 5 W, ID (11 miles away).
- Average last spring frostMay 3150% chance of a 32°F freeze after this date
- Average first fall frostOct 650% chance of a 32°F freeze by this date
- Growing season (frost-free)128 daysmedian, 32°F threshold
- USDA hardiness zone7a0 to 5°F avg. coldest night
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This week in your yard
As of Oct 18, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
58°F 55°F or warmer
24-hour average · latest 56°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Jordan Valley Cwma (18 mi), Murphy 10 W (21 mi), Orchard Range Site (45 mi).
4-inch depth
58°F 55°F or warmer
24-hour average · latest 59°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Jordan Valley Cwma (18 mi), Murphy 10 W (21 mi), Orchard Range Site (45 mi).
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
The latest National Weather Service 7-day forecast and any Frost Advisory or Freeze Warning for 83650 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 58°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent (annual bluegrass, winter weeds): window open as soil cools through the 70s and 60s.
Fertilizer window
Lawn region: Mountain West and High Plains. Timing only; always follow the product label.
- Kentucky bluegrass (cool-season): Early fall: Around Labor Day (late August–September); Late fall: Late October–November, before the ground freezes; Late spring: Optional around Memorial Day. Avoid: Early-spring and midsummer feeding (pushes top growth, favors crabgrass).
Plant now
No vegetable planting windows are open this week.
Prune now
No frost-timed pruning windows are open this week.
Spring-flowering shrubs are pruned right after their flowers fade, not by date. See the pruning guide.
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | May 4 |
| 50% (the "average" last frost) | May 31 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 17 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Sep 10 |
| 50% (the "average" first frost) | Oct 6 |
| 90% (late: most years have frozen by now) | Oct 25 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Jun 12 | Sep 26 |
| 32°F (freeze) | May 31 | Oct 6 |
| 28°F (hard freeze) | May 9 | Oct 19 |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
Vegetable planting calendar for 83650
Dates count from your average last spring frost (May 31) and first fall frost (Oct 6). Half of years have a frost after the spring date, so give tender crops (tomatoes, peppers, squash) some slack.
| Crop | Start indoors | Spring planting | Fall planting |
|---|---|---|---|
| Tomato | Apr 5–19 | Jun 7–21 (transplant) | – |
| Pepper (sweet and hot) | Mar 22–Apr 5 | Jun 14–28 (transplant) | – |
| Eggplant | Mar 22–Apr 5 | Jun 14–28 (transplant) | – |
| Tomatillo | Apr 5–19 | Jun 7–21 (transplant) | – |
| Lettuce | Apr 5–19 | May 10–31 (transplant) May 3–Jun 14 (sow outdoors) | Aug 11–Sep 1 (transplant) Jul 28–Aug 25 (sowing) |
| Spinach | – | Apr 19–May 10 (sow outdoors) | Aug 11–Sep 1 (sowing) |
| Kale | Apr 5–19 | May 3–17 (transplant) May 3–17 (sow outdoors) | Jul 14–Aug 11 (transplant) Jun 30–Jul 28 (sowing) |
| Collards | Apr 5–19 | May 3–31 (transplant) May 3–31 (sow outdoors) | Jul 14–Aug 11 (transplant) Jun 30–Jul 28 (sowing) |
| Broccoli | Mar 22–Apr 5 | May 3–17 (transplant) | Jun 30–Jul 28 (transplant) |
| Cabbage | Mar 22–Apr 5 | May 3–17 (transplant) | Jun 30–Jul 28 (transplant) |
| Cauliflower | Mar 22–Apr 5 | May 17–31 (transplant) | Jun 30–Jul 28 (transplant) |
| Brussels sprouts | Mar 8–22 | May 3–17 (transplant) | Jun 16–Jul 7 (transplant) |
| Kohlrabi | Apr 5–19 | May 3–17 (transplant) May 3–17 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Bok choy / Asian greens | – | May 3–17 (sow outdoors) | Aug 11–25 (sowing) |
| Arugula | – | May 3–31 (sow outdoors) | Aug 11–Sep 8 (sowing) |
| Mustard greens | – | May 3–24 (sow outdoors) | Aug 11–25 (sowing) |
| Swiss chard | Apr 19–May 3 | May 17–Jun 7 (transplant) May 17–Jun 14 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Beet | – | May 3–31 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Carrot | – | May 10–Jun 7 (sow outdoors) | Jul 14–28 (sowing) |
| Radish | – | Apr 26–Jun 7 (sow outdoors) | Aug 25–Sep 8 (sowing) |
| Turnip | – | May 3–24 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Parsnip | – | May 10–31 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 5–May 3 (sow outdoors) | Jul 14–28 (sowing) |
| Onion (bulbing) | Mar 8–22 | Apr 19–May 3 (transplant) | – |
| Green onion / scallion | – | Apr 19–May 17 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Leek | Mar 8–22 | May 3–17 (transplant) | – |
| Garlic | – | – | Aug 25–Sep 22 (sowing) |
| Shallot | – | Apr 19–May 3 (transplant) | Aug 25–Sep 22 (sowing) |
| Potato | – | May 3–17 (transplant) | Jun 16–30 (transplant) |
| Sweet potato | – | Jun 21–Jul 5 (transplant) | – |
| Sweet corn | – | Jun 7–21 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 7–21 (sow outdoors) | – |
| Bean, pole | – | Jun 7–21 (sow outdoors) | – |
| Lima bean | – | Jun 14–28 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 21–Jul 12 (sow outdoors) | – |
| Cucumber | May 3–10 | Jun 7–21 (transplant) Jun 7–21 (sow outdoors) | – |
| Summer squash / zucchini | May 3–10 | Jun 7–21 (transplant) Jun 7–21 (sow outdoors) | – |
| Winter squash | May 3–10 | Jun 7–21 (transplant) Jun 7–21 (sow outdoors) | – |
| Pumpkin | – | Jun 7–21 (sow outdoors) | – |
| Watermelon | May 3–10 | Jun 14–28 (transplant) Jun 14–28 (sow outdoors) | – |
| Cantaloupe / muskmelon | May 3–10 | Jun 14–28 (transplant) Jun 14–28 (sow outdoors) | – |
| Okra | Apr 19–May 3 | Jun 14–28 (transplant) Jun 14–28 (sow outdoors) | – |
| Celery | Mar 8–22 | Jun 7–14 (transplant) | – |
| Basil | Apr 19–May 3 | Jun 7–21 (transplant) Jun 7–21 (sow outdoors) | – |
| Cilantro | – | May 17–Jun 14 (sow outdoors) | Aug 11–25 (sowing) |
| Parsley | Mar 22–Apr 5 | May 17–31 (transplant) May 10–31 (sow outdoors) | – |
| Dill | – | May 31–Jun 14 (sow outdoors) | Aug 11–25 (sowing) |
| Sunflower | – | May 31–Jun 14 (sow outdoors) | – |
| Asparagus (crowns) | – | May 3–17 (transplant) | – |
| Rhubarb (crowns) | – | May 3–17 (transplant) | – |
| Strawberry (plants) | – | May 3–17 (transplant) | Jul 28–Aug 25 (transplant) |
Typical ranges from university extension planting calendars, adjusted to your frost dates. Probabilities, not guarantees. Fall windows that would overlap spring planting are left out, as are fall crops of frost-tender plants where the frost-free season is under 210 days.
Where these numbers come from
Station: Silver City 5 W, ID (NOAA GHCN-Daily ID USC00108412), elevation 6,160 ft, 11.2 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Murphy 10 W, ID | 22 mi | May 17 | Sep 30 |
| Reynolds, ID | 22 mi | May 21 | Sep 28 |
| Sheaville 1 SE, OR | 24 mi | May 22 | Sep 28 |
The average last-frost dates of these stations span 14 days, a rough guide to local variation. See data sources & methods.
Frost questions for 83650
When is the last frost in 83650?
The average (50% chance) last spring freeze of 32°F for ZIP 83650 is May 31. For a more cautious planting date, use June 17, when only 1 year in 10 still sees a later freeze.
When is the first frost in 83650?
The average first fall freeze is October 6. In 1 year in 10 it comes by September 10.
What hardiness zone is 83650?
ZIP 83650 is in USDA zone 7a (0 to 5°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 83650 right now?
This page shows the latest 2-inch and 4-inch soil temperature from the nearest public soil station (USDA SCAN, NOAA USCRN or TexMesonet), or a labeled estimate when no station is close, against the 50–55°F spring pre-emergent band.
Nearby ZIP codes
83624 Grand View 83641 Melba 83639 Marsing 83634 Kuna 83648 Mountain Home AFB 83686 Nampa 97902 97910 Jordan Valley
Other ZIP codes in Owyhee County
83604 83624 83627 83628 83639 83641 All Owyhee County frost dates · Idaho frost dates
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Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- Freeze alerts
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Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.