Frost dates for ZIP 84721 (Cedar City, 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, Cedar City Muni AP, UT (5 miles away).
- Average last spring frostMay 2150% chance of a 32°F freeze after this date
- Average first fall frostSep 2950% chance of a 32°F freeze by this date
- Growing season (frost-free)130 daysmedian, 32°F threshold
- USDA hardiness zone6b-5 to 0°F avg. coldest night
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This week in your yard
As of Oct 17, 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 50°F, as of Oct 17, 10:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Panguitch (39 mi), Sand Hollow (47 mi), Manderfield (49 mi).
4-inch depth
52°F 50–55°F
24-hour average · latest 54°F, as of Oct 17, 10:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Panguitch (39 mi), Sand Hollow (47 mi), Circleville (55 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 84721 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 52°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 4 |
| 50% (the "average" last frost) | May 21 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 8 |
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 17 |
| 50% (the "average" first frost) | Sep 29 |
| 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 21 |
| 32°F (freeze) | May 21 | Sep 29 |
| 28°F (hard freeze) | May 6 | Oct 9 |
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 84721
Dates count from your average last spring frost (May 21) and first fall frost (Sep 29). 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 26–Apr 9 | May 28–Jun 11 (transplant) | – |
| Pepper (sweet and hot) | Mar 12–26 | Jun 4–18 (transplant) | – |
| Eggplant | Mar 12–26 | Jun 4–18 (transplant) | – |
| Tomatillo | Mar 26–Apr 9 | May 28–Jun 11 (transplant) | – |
| Lettuce | Mar 26–Apr 9 | Apr 30–May 21 (transplant) Apr 23–Jun 4 (sow outdoors) | Aug 4–25 (transplant) Jul 21–Aug 18 (sowing) |
| Spinach | – | Apr 9–30 (sow outdoors) | Aug 4–25 (sowing) |
| Kale | Mar 26–Apr 9 | Apr 23–May 7 (transplant) Apr 23–May 7 (sow outdoors) | Jul 7–Aug 4 (transplant) Jun 23–Jul 21 (sowing) |
| Collards | Mar 26–Apr 9 | Apr 23–May 21 (transplant) Apr 23–May 21 (sow outdoors) | Jul 7–Aug 4 (transplant) Jun 23–Jul 21 (sowing) |
| Broccoli | Mar 12–26 | Apr 23–May 7 (transplant) | Jun 23–Jul 21 (transplant) |
| Cabbage | Mar 12–26 | Apr 23–May 7 (transplant) | Jun 23–Jul 21 (transplant) |
| Cauliflower | Mar 12–26 | May 7–21 (transplant) | Jun 23–Jul 21 (transplant) |
| Brussels sprouts | Feb 26–Mar 12 | Apr 23–May 7 (transplant) | Jun 9–30 (transplant) |
| Kohlrabi | Mar 26–Apr 9 | Apr 23–May 7 (transplant) Apr 23–May 7 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Bok choy / Asian greens | – | Apr 23–May 7 (sow outdoors) | Aug 4–18 (sowing) |
| Arugula | – | Apr 23–May 21 (sow outdoors) | Aug 4–Sep 1 (sowing) |
| Mustard greens | – | Apr 23–May 14 (sow outdoors) | Aug 4–18 (sowing) |
| Swiss chard | Apr 9–23 | May 7–28 (transplant) May 7–Jun 4 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Beet | – | Apr 23–May 21 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Carrot | – | Apr 30–May 28 (sow outdoors) | Jul 7–21 (sowing) |
| Radish | – | Apr 16–May 28 (sow outdoors) | Aug 18–Sep 1 (sowing) |
| Turnip | – | Apr 23–May 14 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Parsnip | – | Apr 30–May 21 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Mar 26–Apr 23 (sow outdoors) | Jul 7–21 (sowing) |
| Onion (bulbing) | Feb 26–Mar 12 | Apr 9–23 (transplant) | – |
| Green onion / scallion | – | Apr 9–May 7 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Leek | Feb 26–Mar 12 | Apr 23–May 7 (transplant) | – |
| Garlic | – | – | Aug 18–Sep 15 (sowing) |
| Shallot | – | Apr 9–23 (transplant) | Aug 18–Sep 15 (sowing) |
| Potato | – | Apr 23–May 7 (transplant) | Jun 9–23 (transplant) |
| Sweet potato | – | Jun 11–25 (transplant) | – |
| Sweet corn | – | May 28–Jun 11 (sow outdoors) | – |
| Bean, bush (snap) | – | May 28–Jun 11 (sow outdoors) | – |
| Bean, pole | – | May 28–Jun 11 (sow outdoors) | – |
| Lima bean | – | Jun 4–18 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 11–Jul 2 (sow outdoors) | – |
| Cucumber | Apr 23–30 | May 28–Jun 11 (transplant) May 28–Jun 11 (sow outdoors) | – |
| Summer squash / zucchini | Apr 23–30 | May 28–Jun 11 (transplant) May 28–Jun 11 (sow outdoors) | – |
| Winter squash | Apr 23–30 | May 28–Jun 11 (transplant) May 28–Jun 11 (sow outdoors) | – |
| Pumpkin | – | May 28–Jun 11 (sow outdoors) | – |
| Watermelon | Apr 23–30 | Jun 4–18 (transplant) Jun 4–18 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 23–30 | Jun 4–18 (transplant) Jun 4–18 (sow outdoors) | – |
| Okra | Apr 9–23 | Jun 4–18 (transplant) Jun 4–18 (sow outdoors) | – |
| Celery | Feb 26–Mar 12 | May 28–Jun 4 (transplant) | – |
| Basil | Apr 9–23 | May 28–Jun 11 (transplant) May 28–Jun 11 (sow outdoors) | – |
| Cilantro | – | May 7–Jun 4 (sow outdoors) | Aug 4–18 (sowing) |
| Parsley | Mar 12–26 | May 7–21 (transplant) Apr 30–May 21 (sow outdoors) | – |
| Dill | – | May 21–Jun 4 (sow outdoors) | Aug 4–18 (sowing) |
| Sunflower | – | May 21–Jun 4 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 23–May 7 (transplant) | – |
| Rhubarb (crowns) | – | Apr 23–May 7 (transplant) | – |
| Strawberry (plants) | – | Apr 23–May 7 (transplant) | Jul 21–Aug 18 (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: Cedar City Muni AP, UT (NOAA GHCN-Daily ID USW00093129), elevation 5,586 ft, 4.7 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Cedar City, UT | 8 mi | May 4 | Oct 13 |
| Cedar City 5E, UT | 11 mi | May 23 | Oct 4 |
| Brian Head, UT | 17 mi | Jun 21 | Sep 12 |
The average last-frost dates of these stations span 48 days, a rough guide to local variation. See data sources & methods.
Frost questions for 84721
When is the last frost in 84721?
The average (50% chance) last spring freeze of 32°F for ZIP 84721 is May 21. For a more cautious planting date, use June 8, when only 1 year in 10 still sees a later freeze.
When is the first frost in 84721?
The average first fall freeze is September 29. In 1 year in 10 it comes by September 17.
What hardiness zone is 84721?
ZIP 84721 is in USDA zone 6b (-5 to 0°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 84721 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
84772 Summit 84720 Cedar City 84761 Parowan 84742 Kanarraville 84719 Brian Head 84757 New Harmony 84756 Newcastle 84760 Paragonah
Other ZIP codes in Iron County
84714 84719 84720 84742 84753 84756 84760 84761 84772 All Iron County frost dates · Utah frost dates
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