Fall in zone 5aPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 83422 (Driggs, 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, Driggs, ID (10 miles away).
- Average last spring frostJun 1350% chance of a 32°F freeze after this date
- Average first fall frostSep 950% chance of a 32°F freeze by this date
- Growing season (frost-free)86 daysmedian, 32°F threshold
- USDA hardiness zone5a-20 to -15°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
45°F Below 50°F
24-hour average · latest 42°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Moose 1 NNE (30 mi).
4-inch depth
46°F Below 50°F
24-hour average · latest 46°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Moose 1 NNE (30 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 83422 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 46°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent window is mostly past. Next: spring, when soil reaches 50°F (typically mid-April to mid-May).
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 27 |
| 50% (the "average" last frost) | Jun 13 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 28 |
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) | Aug 26 |
| 50% (the "average" first frost) | Sep 9 |
| 90% (late: most years have frozen by now) | Sep 23 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | n/a | n/a |
| 32°F (freeze) | Jun 13 | Sep 9 |
| 28°F (hard freeze) | May 22 | Sep 20 |
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 83422
Dates count from your average last spring frost (Jun 13) and first fall frost (Sep 9). 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 18–May 2 | Jun 20–Jul 4 (transplant) | – |
| Pepper (sweet and hot) | Apr 4–18 | Jun 27–Jul 11 (transplant) | – |
| Eggplant | Apr 4–18 | Jun 27–Jul 11 (transplant) | – |
| Tomatillo | Apr 18–May 2 | Jun 20–Jul 4 (transplant) | – |
| Lettuce | Apr 18–May 2 | May 23–Jun 13 (transplant) May 16–Jun 27 (sow outdoors) | Jul 15–Aug 5 (transplant) Jul 1–29 (sowing) |
| Spinach | – | May 2–23 (sow outdoors) | Jul 15–Aug 5 (sowing) |
| Kale | Apr 18–May 2 | May 16–30 (transplant) May 16–30 (sow outdoors) | Jun 17–Jul 15 (transplant) Jun 3–Jul 1 (sowing) |
| Collards | Apr 18–May 2 | May 16–Jun 13 (transplant) May 16–Jun 13 (sow outdoors) | Jun 17–Jul 15 (transplant) |
| Broccoli | Apr 4–18 | May 16–30 (transplant) | Jun 3–Jul 1 (transplant) |
| Cabbage | Apr 4–18 | May 16–30 (transplant) | Jun 3–Jul 1 (transplant) |
| Cauliflower | Apr 4–18 | May 30–Jun 13 (transplant) | – |
| Brussels sprouts | Mar 21–Apr 4 | May 16–30 (transplant) | – |
| Kohlrabi | Apr 18–May 2 | May 16–30 (transplant) May 16–30 (sow outdoors) | Jul 1–15 (sowing) |
| Bok choy / Asian greens | – | May 16–30 (sow outdoors) | Jul 15–29 (sowing) |
| Arugula | – | May 16–Jun 13 (sow outdoors) | Jul 15–Aug 12 (sowing) |
| Mustard greens | – | May 16–Jun 6 (sow outdoors) | Jul 15–29 (sowing) |
| Swiss chard | May 2–16 | May 30–Jun 20 (transplant) May 30–Jun 27 (sow outdoors) | Jul 1–15 (sowing) |
| Beet | – | May 16–Jun 13 (sow outdoors) | Jul 1–15 (sowing) |
| Carrot | – | May 23–Jun 20 (sow outdoors) | – |
| Radish | – | May 9–Jun 20 (sow outdoors) | Jul 29–Aug 12 (sowing) |
| Turnip | – | May 16–Jun 6 (sow outdoors) | Jul 1–15 (sowing) |
| Parsnip | – | May 23–Jun 13 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 18–May 16 (sow outdoors) | Jun 17–Jul 1 (sowing) |
| Onion (bulbing) | Mar 21–Apr 4 | May 2–16 (transplant) | – |
| Green onion / scallion | – | May 2–30 (sow outdoors) | Jul 1–15 (sowing) |
| Leek | Mar 21–Apr 4 | May 16–30 (transplant) | – |
| Garlic | – | – | Jul 29–Aug 26 (sowing) |
| Shallot | – | May 2–16 (transplant) | Jul 29–Aug 26 (sowing) |
| Potato | – | May 16–30 (transplant) | – |
| Sweet potato | – | Jul 4–18 (transplant) | – |
| Sweet corn | – | Jun 20–Jul 4 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 20–Jul 4 (sow outdoors) | – |
| Bean, pole | – | Jun 20–Jul 4 (sow outdoors) | – |
| Lima bean | – | Jun 27–Jul 11 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jul 4–25 (sow outdoors) | – |
| Cucumber | May 16–23 | Jun 20–Jul 4 (transplant) Jun 20–Jul 4 (sow outdoors) | – |
| Summer squash / zucchini | May 16–23 | Jun 20–Jul 4 (transplant) Jun 20–Jul 4 (sow outdoors) | – |
| Winter squash | May 16–23 | Jun 20–Jul 4 (transplant) Jun 20–Jul 4 (sow outdoors) | – |
| Pumpkin | – | Jun 20–Jul 4 (sow outdoors) | – |
| Watermelon | May 16–23 | Jun 27–Jul 11 (transplant) Jun 27–Jul 11 (sow outdoors) | – |
| Cantaloupe / muskmelon | May 16–23 | Jun 27–Jul 11 (transplant) Jun 27–Jul 11 (sow outdoors) | – |
| Okra | May 2–16 | Jun 27–Jul 11 (transplant) Jun 27–Jul 11 (sow outdoors) | – |
| Celery | Mar 21–Apr 4 | Jun 20–27 (transplant) | – |
| Basil | May 2–16 | Jun 20–Jul 4 (transplant) Jun 20–Jul 4 (sow outdoors) | – |
| Cilantro | – | May 30–Jun 27 (sow outdoors) | Jul 15–29 (sowing) |
| Parsley | Apr 4–18 | May 30–Jun 13 (transplant) May 23–Jun 13 (sow outdoors) | – |
| Dill | – | Jun 13–27 (sow outdoors) | Jul 15–29 (sowing) |
| Sunflower | – | Jun 13–27 (sow outdoors) | – |
| Asparagus (crowns) | – | May 16–30 (transplant) | – |
| Rhubarb (crowns) | – | May 16–30 (transplant) | – |
| Strawberry (plants) | – | May 16–30 (transplant) | Jul 1–29 (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: Driggs, ID (NOAA GHCN-Daily ID USC00102676), elevation 6,120 ft, 9.8 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Tetonia EXP STN, ID | 12 mi | Jun 15 | Sep 7 |
| Alta 1 NNW, WY | 15 mi | Jun 14 | Sep 11 |
| Sugar City, ID | 26 mi | May 29 | Sep 13 |
The average last-frost dates of these stations span 17 days, a rough guide to local variation. See data sources & methods.
Frost questions for 83422
When is the last frost in 83422?
The average (50% chance) last spring freeze of 32°F for ZIP 83422 is June 13. For a more cautious planting date, use June 28, when only 1 year in 10 still sees a later freeze.
When is the first frost in 83422?
The average first fall freeze is September 9. In 1 year in 10 it comes by August 26.
What hardiness zone is 83422?
ZIP 83422 is in USDA zone 5a (-20 to -15°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 83422 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
83452 Tetonia 83455 Victor 83436 Newdale 83424 83443 Ririe 83449 Swan Valley 83451 Teton 83414 Alta
Other ZIP codes in Teton County
83424 83452 83455 All Teton County frost dates · Idaho frost dates
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- 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.