Fall in zone 6aPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 84665 (Sterling, UT)
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, Manti, UT (5 miles away).
- Average last spring frostMay 1150% 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)146 daysmedian, 32°F threshold
- USDA hardiness zone6a-10 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
47°F Below 50°F
24-hour average · latest 47°F, as of Oct 18, 2:00 AM CDT
Measured at USDA NRCS SCAN station Ephraim, 12 mi away. Daily averages: Thu 49°, Fri 48°, Sat 47°.
4-inch depth
48°F Below 50°F
24-hour average · latest 48°F, as of Oct 18, 2:00 AM CDT
Measured at USDA NRCS SCAN station Ephraim, 12 mi away. Daily averages: Thu 50°, Fri 50°, Sat 48°.
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 84665 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 48°F at 4 inches. 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) | Apr 25 |
| 50% (the "average" last frost) | May 11 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 1 |
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 24 |
| 50% (the "average" first frost) | Oct 6 |
| 90% (late: most years have frozen by now) | Oct 19 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 28 | Sep 27 |
| 32°F (freeze) | May 11 | Oct 6 |
| 28°F (hard freeze) | Apr 26 | Oct 16 |
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 84665
Dates count from your average last spring frost (May 11) 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 | Mar 16–30 | May 18–Jun 1 (transplant) | – |
| Pepper (sweet and hot) | Mar 2–16 | May 25–Jun 8 (transplant) | – |
| Eggplant | Mar 2–16 | May 25–Jun 8 (transplant) | – |
| Tomatillo | Mar 16–30 | May 18–Jun 1 (transplant) | – |
| Lettuce | Mar 16–30 | Apr 20–May 11 (transplant) Apr 13–May 25 (sow outdoors) | Aug 11–Sep 1 (transplant) Jul 28–Aug 25 (sowing) |
| Spinach | – | Mar 30–Apr 20 (sow outdoors) | Aug 11–Sep 1 (sowing) |
| Kale | Mar 16–30 | Apr 13–27 (transplant) Apr 13–27 (sow outdoors) | Jul 14–Aug 11 (transplant) Jun 30–Jul 28 (sowing) |
| Collards | Mar 16–30 | Apr 13–May 11 (transplant) Apr 13–May 11 (sow outdoors) | Jul 14–Aug 11 (transplant) Jun 30–Jul 28 (sowing) |
| Broccoli | Mar 2–16 | Apr 13–27 (transplant) | Jun 30–Jul 28 (transplant) |
| Cabbage | Mar 2–16 | Apr 13–27 (transplant) | Jun 30–Jul 28 (transplant) |
| Cauliflower | Mar 2–16 | Apr 27–May 11 (transplant) | Jun 30–Jul 28 (transplant) |
| Brussels sprouts | Feb 16–Mar 2 | Apr 13–27 (transplant) | Jun 16–Jul 7 (transplant) |
| Kohlrabi | Mar 16–30 | Apr 13–27 (transplant) Apr 13–27 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Bok choy / Asian greens | – | Apr 13–27 (sow outdoors) | Aug 11–25 (sowing) |
| Arugula | – | Apr 13–May 11 (sow outdoors) | Aug 11–Sep 8 (sowing) |
| Mustard greens | – | Apr 13–May 4 (sow outdoors) | Aug 11–25 (sowing) |
| Swiss chard | Mar 30–Apr 13 | Apr 27–May 18 (transplant) Apr 27–May 25 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Beet | – | Apr 13–May 11 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Carrot | – | Apr 20–May 18 (sow outdoors) | Jul 14–28 (sowing) |
| Radish | – | Apr 6–May 18 (sow outdoors) | Aug 25–Sep 8 (sowing) |
| Turnip | – | Apr 13–May 4 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Parsnip | – | Apr 20–May 11 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Mar 16–Apr 13 (sow outdoors) | Jul 14–28 (sowing) |
| Onion (bulbing) | Feb 16–Mar 2 | Mar 30–Apr 13 (transplant) | – |
| Green onion / scallion | – | Mar 30–Apr 27 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Leek | Feb 16–Mar 2 | Apr 13–27 (transplant) | – |
| Garlic | – | – | Aug 25–Sep 22 (sowing) |
| Shallot | – | Mar 30–Apr 13 (transplant) | Aug 25–Sep 22 (sowing) |
| Potato | – | Apr 13–27 (transplant) | Jun 16–30 (transplant) |
| Sweet potato | – | Jun 1–15 (transplant) | – |
| Sweet corn | – | May 18–Jun 1 (sow outdoors) | – |
| Bean, bush (snap) | – | May 18–Jun 1 (sow outdoors) | – |
| Bean, pole | – | May 18–Jun 1 (sow outdoors) | – |
| Lima bean | – | May 25–Jun 8 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 1–22 (sow outdoors) | – |
| Cucumber | Apr 13–20 | May 18–Jun 1 (transplant) May 18–Jun 1 (sow outdoors) | – |
| Summer squash / zucchini | Apr 13–20 | May 18–Jun 1 (transplant) May 18–Jun 1 (sow outdoors) | – |
| Winter squash | Apr 13–20 | May 18–Jun 1 (transplant) May 18–Jun 1 (sow outdoors) | – |
| Pumpkin | – | May 18–Jun 1 (sow outdoors) | – |
| Watermelon | Apr 13–20 | May 25–Jun 8 (transplant) May 25–Jun 8 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 13–20 | May 25–Jun 8 (transplant) May 25–Jun 8 (sow outdoors) | – |
| Okra | Mar 30–Apr 13 | May 25–Jun 8 (transplant) May 25–Jun 8 (sow outdoors) | – |
| Celery | Feb 16–Mar 2 | May 18–25 (transplant) | – |
| Basil | Mar 30–Apr 13 | May 18–Jun 1 (transplant) May 18–Jun 1 (sow outdoors) | – |
| Cilantro | – | Apr 27–May 25 (sow outdoors) | Aug 11–25 (sowing) |
| Parsley | Mar 2–16 | Apr 27–May 11 (transplant) Apr 20–May 11 (sow outdoors) | – |
| Dill | – | May 11–25 (sow outdoors) | Aug 11–25 (sowing) |
| Sunflower | – | May 11–25 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 13–27 (transplant) | – |
| Rhubarb (crowns) | – | Apr 13–27 (transplant) | – |
| Strawberry (plants) | – | Apr 13–27 (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: Manti, UT (NOAA GHCN-Daily ID USC00425402), elevation 5,740 ft, 4.7 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Manti Radio Kmti, UT | 6 mi | May 31 | Sep 21 |
| Ephraim, UT | 11 mi | May 28 | Sep 20 |
| Salina 24 E, UT | 22 mi | May 29 | Sep 26 |
The average last-frost dates of these stations span 20 days, a rough guide to local variation. See data sources & methods.
Frost questions for 84665
When is the last frost in 84665?
The average (50% chance) last spring freeze of 32°F for ZIP 84665 is May 11. For a more cautious planting date, use June 1, when only 1 year in 10 still sees a later freeze.
When is the first frost in 84665?
The average first fall freeze is October 6. In 1 year in 10 it comes by September 24.
What hardiness zone is 84665?
ZIP 84665 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 84665 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
84642 Manti 84643 Mayfield 84627 Ephraim 84634 Gunnison 84622 Centerfield 84630 Fayette 84621 84623
Other ZIP codes in Sanpete County
84621 84622 84623 84627 84629 84630 84632 84634 84642 84643 84646 84647 84662 84667 All Sanpete County frost dates · Utah frost dates
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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.