Fall in zone 6aPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 83263 (Preston, 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, Preston, ID (9 miles away).
- Average last spring frostMay 1650% chance of a 32°F freeze after this date
- Average first fall frostSep 2850% chance of a 32°F freeze by this date
- Growing season (frost-free)133 daysmedian, 32°F threshold
- USDA hardiness zone6a-10 to -5°F avg. coldest night
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Frost and freeze alerts from the NWS forecast for 83263, the spring soil-temperature heads-up for pre-emergent, and a short weekly yard-timing email.
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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
50°F 50–55°F
24-hour average · latest 50°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Cache Junction (28 mi), Blue Creek (39 mi), Brigham City 28 WNW (56 mi).
4-inch depth
51°F 50–55°F
24-hour average · latest 52°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Cache Junction (28 mi), Blue Creek (39 mi), Brigham City 28 WNW (56 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 83263 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 51°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 2 |
| 50% (the "average" last frost) | May 16 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 4 |
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 14 |
| 50% (the "average" first frost) | Sep 28 |
| 90% (late: most years have frozen by now) | Oct 14 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Jun 3 | Sep 17 |
| 32°F (freeze) | May 16 | Sep 28 |
| 28°F (hard freeze) | Apr 30 | Oct 10 |
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 83263
Dates count from your average last spring frost (May 16) and first fall frost (Sep 28). 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 | Mar 21–Apr 4 | May 23–Jun 6 (transplant) | – |
| Pepper (sweet and hot) | Mar 7–21 | May 30–Jun 13 (transplant) | – |
| Eggplant | Mar 7–21 | May 30–Jun 13 (transplant) | – |
| Tomatillo | Mar 21–Apr 4 | May 23–Jun 6 (transplant) | – |
| Lettuce | Mar 21–Apr 4 | Apr 25–May 16 (transplant) Apr 18–May 30 (sow outdoors) | Aug 3–24 (transplant) Jul 20–Aug 17 (sowing) |
| Spinach | – | Apr 4–25 (sow outdoors) | Aug 3–24 (sowing) |
| Kale | Mar 21–Apr 4 | Apr 18–May 2 (transplant) Apr 18–May 2 (sow outdoors) | Jul 6–Aug 3 (transplant) Jun 22–Jul 20 (sowing) |
| Collards | Mar 21–Apr 4 | Apr 18–May 16 (transplant) Apr 18–May 16 (sow outdoors) | Jul 6–Aug 3 (transplant) Jun 22–Jul 20 (sowing) |
| Broccoli | Mar 7–21 | Apr 18–May 2 (transplant) | Jun 22–Jul 20 (transplant) |
| Cabbage | Mar 7–21 | Apr 18–May 2 (transplant) | Jun 22–Jul 20 (transplant) |
| Cauliflower | Mar 7–21 | May 2–16 (transplant) | Jun 22–Jul 20 (transplant) |
| Brussels sprouts | Feb 21–Mar 7 | Apr 18–May 2 (transplant) | Jun 8–29 (transplant) |
| Kohlrabi | Mar 21–Apr 4 | Apr 18–May 2 (transplant) Apr 18–May 2 (sow outdoors) | Jul 20–Aug 3 (sowing) |
| Bok choy / Asian greens | – | Apr 18–May 2 (sow outdoors) | Aug 3–17 (sowing) |
| Arugula | – | Apr 18–May 16 (sow outdoors) | Aug 3–31 (sowing) |
| Mustard greens | – | Apr 18–May 9 (sow outdoors) | Aug 3–17 (sowing) |
| Swiss chard | Apr 4–18 | May 2–23 (transplant) May 2–30 (sow outdoors) | Jul 20–Aug 3 (sowing) |
| Beet | – | Apr 18–May 16 (sow outdoors) | Jul 20–Aug 3 (sowing) |
| Carrot | – | Apr 25–May 23 (sow outdoors) | Jul 6–20 (sowing) |
| Radish | – | Apr 11–May 23 (sow outdoors) | Aug 17–31 (sowing) |
| Turnip | – | Apr 18–May 9 (sow outdoors) | Jul 20–Aug 3 (sowing) |
| Parsnip | – | Apr 25–May 16 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Mar 21–Apr 18 (sow outdoors) | Jul 6–20 (sowing) |
| Onion (bulbing) | Feb 21–Mar 7 | Apr 4–18 (transplant) | – |
| Green onion / scallion | – | Apr 4–May 2 (sow outdoors) | Jul 20–Aug 3 (sowing) |
| Leek | Feb 21–Mar 7 | Apr 18–May 2 (transplant) | – |
| Garlic | – | – | Aug 17–Sep 14 (sowing) |
| Shallot | – | Apr 4–18 (transplant) | Aug 17–Sep 14 (sowing) |
| Potato | – | Apr 18–May 2 (transplant) | Jun 8–22 (transplant) |
| Sweet potato | – | Jun 6–20 (transplant) | – |
| Sweet corn | – | May 23–Jun 6 (sow outdoors) | – |
| Bean, bush (snap) | – | May 23–Jun 6 (sow outdoors) | – |
| Bean, pole | – | May 23–Jun 6 (sow outdoors) | – |
| Lima bean | – | May 30–Jun 13 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 6–27 (sow outdoors) | – |
| Cucumber | Apr 18–25 | May 23–Jun 6 (transplant) May 23–Jun 6 (sow outdoors) | – |
| Summer squash / zucchini | Apr 18–25 | May 23–Jun 6 (transplant) May 23–Jun 6 (sow outdoors) | – |
| Winter squash | Apr 18–25 | May 23–Jun 6 (transplant) May 23–Jun 6 (sow outdoors) | – |
| Pumpkin | – | May 23–Jun 6 (sow outdoors) | – |
| Watermelon | Apr 18–25 | May 30–Jun 13 (transplant) May 30–Jun 13 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 18–25 | May 30–Jun 13 (transplant) May 30–Jun 13 (sow outdoors) | – |
| Okra | Apr 4–18 | May 30–Jun 13 (transplant) May 30–Jun 13 (sow outdoors) | – |
| Celery | Feb 21–Mar 7 | May 23–30 (transplant) | – |
| Basil | Apr 4–18 | May 23–Jun 6 (transplant) May 23–Jun 6 (sow outdoors) | – |
| Cilantro | – | May 2–30 (sow outdoors) | Aug 3–17 (sowing) |
| Parsley | Mar 7–21 | May 2–16 (transplant) Apr 25–May 16 (sow outdoors) | – |
| Dill | – | May 16–30 (sow outdoors) | Aug 3–17 (sowing) |
| Sunflower | – | May 16–30 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 18–May 2 (transplant) | – |
| Rhubarb (crowns) | – | Apr 18–May 2 (transplant) | – |
| Strawberry (plants) | – | Apr 18–May 2 (transplant) | Jul 20–Aug 17 (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: Preston, ID (NOAA GHCN-Daily ID USC00107346), elevation 4,719 ft, 9.0 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Richmond, UT | 19 mi | May 11 | Oct 5 |
| Trenton, UT | 20 mi | May 17 | Sep 18 |
| Bern, ID | 22 mi | Jun 17 | Sep 3 |
The average last-frost dates of these stations span 37 days, a rough guide to local variation. See data sources & methods.
Frost questions for 83263
When is the last frost in 83263?
The average (50% chance) last spring freeze of 32°F for ZIP 83263 is May 16. For a more cautious planting date, use June 4, when only 1 year in 10 still sees a later freeze.
When is the first frost in 83263?
The average first fall freeze is September 28. In 1 year in 10 it comes by September 14.
What hardiness zone is 83263?
ZIP 83263 is in USDA zone 6a (-10 to -5°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 83263 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
83237 Franklin 83232 Dayton 83283 83281 83286 Weston 83228 Clifton 84320 Lewiston 83223 Bloomington
Other ZIP codes in Franklin County
83228 83232 83237 83283 83286 All Franklin 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.