Frost dates for ZIP 84701 (Richfield, 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, Koosharem, UT (7 miles away).
- Average last spring frostJun 650% chance of a 32°F freeze after this date
- Average first fall frostSep 2150% chance of a 32°F freeze by this date
- Growing season (frost-free)104 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 17, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
49°F Below 50°F
24-hour average · latest 53°F, as of Oct 17, 10:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Circleville (39 mi), Manderfield (48 mi), Holden (53 mi).
4-inch depth
49°F Below 50°F
24-hour average · latest 53°F, as of Oct 17, 10:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Circleville (39 mi), Holden (53 mi), Ephraim (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 84701 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 49°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 24 |
| 50% (the "average" last frost) | Jun 6 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 26 |
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 5 |
| 50% (the "average" first frost) | Sep 21 |
| 90% (late: most years have frozen by now) | Oct 2 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Jun 22 | Sep 10 |
| 32°F (freeze) | Jun 6 | Sep 21 |
| 28°F (hard freeze) | May 26 | Sep 29 |
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 84701
Dates count from your average last spring frost (Jun 6) and first fall frost (Sep 21). 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 11–25 | Jun 13–27 (transplant) | – |
| Pepper (sweet and hot) | Mar 28–Apr 11 | Jun 20–Jul 4 (transplant) | – |
| Eggplant | Mar 28–Apr 11 | Jun 20–Jul 4 (transplant) | – |
| Tomatillo | Apr 11–25 | Jun 13–27 (transplant) | – |
| Lettuce | Apr 11–25 | May 16–Jun 6 (transplant) May 9–Jun 20 (sow outdoors) | Jul 27–Aug 17 (transplant) Jul 13–Aug 10 (sowing) |
| Spinach | – | Apr 25–May 16 (sow outdoors) | Jul 27–Aug 17 (sowing) |
| Kale | Apr 11–25 | May 9–23 (transplant) May 9–23 (sow outdoors) | Jun 29–Jul 27 (transplant) Jun 15–Jul 13 (sowing) |
| Collards | Apr 11–25 | May 9–Jun 6 (transplant) May 9–Jun 6 (sow outdoors) | Jun 29–Jul 27 (transplant) Jun 15–Jul 13 (sowing) |
| Broccoli | Mar 28–Apr 11 | May 9–23 (transplant) | Jun 15–Jul 13 (transplant) |
| Cabbage | Mar 28–Apr 11 | May 9–23 (transplant) | Jun 15–Jul 13 (transplant) |
| Cauliflower | Mar 28–Apr 11 | May 23–Jun 6 (transplant) | Jun 15–Jul 13 (transplant) |
| Brussels sprouts | Mar 14–28 | May 9–23 (transplant) | Jun 1–22 (transplant) |
| Kohlrabi | Apr 11–25 | May 9–23 (transplant) May 9–23 (sow outdoors) | Jul 13–27 (sowing) |
| Bok choy / Asian greens | – | May 9–23 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Arugula | – | May 9–Jun 6 (sow outdoors) | Jul 27–Aug 24 (sowing) |
| Mustard greens | – | May 9–30 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Swiss chard | Apr 25–May 9 | May 23–Jun 13 (transplant) May 23–Jun 20 (sow outdoors) | Jul 13–27 (sowing) |
| Beet | – | May 9–Jun 6 (sow outdoors) | Jul 13–27 (sowing) |
| Carrot | – | May 16–Jun 13 (sow outdoors) | Jun 29–Jul 13 (sowing) |
| Radish | – | May 2–Jun 13 (sow outdoors) | Aug 10–24 (sowing) |
| Turnip | – | May 9–30 (sow outdoors) | Jul 13–27 (sowing) |
| Parsnip | – | May 16–Jun 6 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 11–May 9 (sow outdoors) | Jun 29–Jul 13 (sowing) |
| Onion (bulbing) | Mar 14–28 | Apr 25–May 9 (transplant) | – |
| Green onion / scallion | – | Apr 25–May 23 (sow outdoors) | Jul 13–27 (sowing) |
| Leek | Mar 14–28 | May 9–23 (transplant) | – |
| Garlic | – | – | Aug 10–Sep 7 (sowing) |
| Shallot | – | Apr 25–May 9 (transplant) | Aug 10–Sep 7 (sowing) |
| Potato | – | May 9–23 (transplant) | Jun 1–15 (transplant) |
| Sweet potato | – | Jun 27–Jul 11 (transplant) | – |
| Sweet corn | – | Jun 13–27 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 13–27 (sow outdoors) | – |
| Bean, pole | – | Jun 13–27 (sow outdoors) | – |
| Lima bean | – | Jun 20–Jul 4 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 27–Jul 18 (sow outdoors) | – |
| Cucumber | May 9–16 | Jun 13–27 (transplant) Jun 13–27 (sow outdoors) | – |
| Summer squash / zucchini | May 9–16 | Jun 13–27 (transplant) Jun 13–27 (sow outdoors) | – |
| Winter squash | May 9–16 | Jun 13–27 (transplant) Jun 13–27 (sow outdoors) | – |
| Pumpkin | – | Jun 13–27 (sow outdoors) | – |
| Watermelon | May 9–16 | Jun 20–Jul 4 (transplant) Jun 20–Jul 4 (sow outdoors) | – |
| Cantaloupe / muskmelon | May 9–16 | Jun 20–Jul 4 (transplant) Jun 20–Jul 4 (sow outdoors) | – |
| Okra | Apr 25–May 9 | Jun 20–Jul 4 (transplant) Jun 20–Jul 4 (sow outdoors) | – |
| Celery | Mar 14–28 | Jun 13–20 (transplant) | – |
| Basil | Apr 25–May 9 | Jun 13–27 (transplant) Jun 13–27 (sow outdoors) | – |
| Cilantro | – | May 23–Jun 20 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Parsley | Mar 28–Apr 11 | May 23–Jun 6 (transplant) May 16–Jun 6 (sow outdoors) | – |
| Dill | – | Jun 6–20 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Sunflower | – | Jun 6–20 (sow outdoors) | – |
| Asparagus (crowns) | – | May 9–23 (transplant) | – |
| Rhubarb (crowns) | – | May 9–23 (transplant) | – |
| Strawberry (plants) | – | May 9–23 (transplant) | Jul 13–Aug 10 (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: Koosharem, UT (NOAA GHCN-Daily ID USC00424764), elevation 6,930 ft, 7.3 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Loa, UT | 15 mi | May 31 | Sep 21 |
| Richfield Radio Ksvc, UT | 19 mi | May 21 | Sep 24 |
| Marysvale, UT | 25 mi | May 24 | Sep 25 |
The average last-frost dates of these stations span 16 days, a rough guide to local variation. See data sources & methods.
Frost questions for 84701
When is the last frost in 84701?
The average (50% chance) last spring freeze of 32°F for ZIP 84701 is June 6. For a more cautious planting date, use June 26, when only 1 year in 10 still sees a later freeze.
When is the first frost in 84701?
The average first fall freeze is September 21. In 1 year in 10 it comes by September 5.
What hardiness zone is 84701?
ZIP 84701 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 84701 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
84744 Koosharem 84732 84747 Fremont 84730 Glenwood 84711 Annabella 84754 Monroe 84657 Sigurd 84724 Elsinore
Other ZIP codes in Sevier County
84620 84652 84654 84657 84711 84724 84730 84739 84744 84754 84766 All Sevier County frost dates · Utah frost dates
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