Fall in zone 4aPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 84064 (Randolph, 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, Randolph, UT (4 miles away).
- Average last spring frostJun 1450% chance of a 32°F freeze after this date
- Average first fall frostSep 150% chance of a 32°F freeze by this date
- Growing season (frost-free)76 daysmedian, 32°F threshold
- USDA hardiness zone4a-30 to -25°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
46°F Below 50°F
24-hour average · latest 46°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Buffalo Jump (24 mi), Chicken Ridge (26 mi), Cache Junction (46 mi).
4-inch depth
47°F Below 50°F
24-hour average · latest 47°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Buffalo Jump (24 mi), Chicken Ridge (26 mi), Cache Junction (46 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 84064 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 47°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 31 |
| 50% (the "average" last frost) | Jun 14 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 30 |
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 18 |
| 50% (the "average" first frost) | Sep 1 |
| 90% (late: most years have frozen by now) | Sep 13 |
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 14 | Sep 1 |
| 28°F (hard freeze) | May 30 | Sep 11 |
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 84064
Dates count from your average last spring frost (Jun 14) and first fall frost (Sep 1). 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 19–May 3 | Jun 21–Jul 5 (transplant) | – |
| Pepper (sweet and hot) | Apr 5–19 | Jun 28–Jul 12 (transplant) | – |
| Eggplant | Apr 5–19 | Jun 28–Jul 12 (transplant) | – |
| Tomatillo | Apr 19–May 3 | Jun 21–Jul 5 (transplant) | – |
| Lettuce | Apr 19–May 3 | May 24–Jun 14 (transplant) May 17–Jun 28 (sow outdoors) | Jul 7–28 (transplant) |
| Spinach | – | May 3–24 (sow outdoors) | Jul 7–28 (sowing) |
| Kale | Apr 19–May 3 | May 17–31 (transplant) May 17–31 (sow outdoors) | Jun 9–Jul 7 (transplant) |
| Collards | Apr 19–May 3 | May 17–Jun 14 (transplant) May 17–Jun 14 (sow outdoors) | – |
| Broccoli | Apr 5–19 | May 17–31 (transplant) | – |
| Cabbage | Apr 5–19 | May 17–31 (transplant) | – |
| Cauliflower | Apr 5–19 | May 31–Jun 14 (transplant) | – |
| Brussels sprouts | Mar 22–Apr 5 | May 17–31 (transplant) | – |
| Kohlrabi | Apr 19–May 3 | May 17–31 (transplant) May 17–31 (sow outdoors) | Jun 23–Jul 7 (sowing) |
| Bok choy / Asian greens | – | May 17–31 (sow outdoors) | Jul 7–21 (sowing) |
| Arugula | – | May 17–Jun 14 (sow outdoors) | Jul 7–Aug 4 (sowing) |
| Mustard greens | – | May 17–Jun 7 (sow outdoors) | Jul 7–21 (sowing) |
| Swiss chard | May 3–17 | May 31–Jun 21 (transplant) May 31–Jun 28 (sow outdoors) | – |
| Beet | – | May 17–Jun 14 (sow outdoors) | Jun 23–Jul 7 (sowing) |
| Carrot | – | May 24–Jun 21 (sow outdoors) | – |
| Radish | – | May 10–Jun 21 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Turnip | – | May 17–Jun 7 (sow outdoors) | Jun 23–Jul 7 (sowing) |
| Parsnip | – | May 24–Jun 14 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 19–May 17 (sow outdoors) | Jun 9–23 (sowing) |
| Onion (bulbing) | Mar 22–Apr 5 | May 3–17 (transplant) | – |
| Green onion / scallion | – | May 3–31 (sow outdoors) | Jun 23–Jul 7 (sowing) |
| Leek | Mar 22–Apr 5 | May 17–31 (transplant) | – |
| Garlic | – | – | Jul 21–Aug 18 (sowing) |
| Shallot | – | May 3–17 (transplant) | Jul 21–Aug 18 (sowing) |
| Potato | – | May 17–31 (transplant) | – |
| Sweet potato | – | Jul 5–19 (transplant) | – |
| Sweet corn | – | Jun 21–Jul 5 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 21–Jul 5 (sow outdoors) | – |
| Bean, pole | – | Jun 21–Jul 5 (sow outdoors) | – |
| Lima bean | – | Jun 28–Jul 12 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jul 5–26 (sow outdoors) | – |
| Cucumber | May 17–24 | Jun 21–Jul 5 (transplant) Jun 21–Jul 5 (sow outdoors) | – |
| Summer squash / zucchini | May 17–24 | Jun 21–Jul 5 (transplant) Jun 21–Jul 5 (sow outdoors) | – |
| Winter squash | May 17–24 | Jun 21–Jul 5 (transplant) Jun 21–Jul 5 (sow outdoors) | – |
| Pumpkin | – | Jun 21–Jul 5 (sow outdoors) | – |
| Watermelon | May 17–24 | Jun 28–Jul 12 (transplant) Jun 28–Jul 12 (sow outdoors) | – |
| Cantaloupe / muskmelon | May 17–24 | Jun 28–Jul 12 (transplant) Jun 28–Jul 12 (sow outdoors) | – |
| Okra | May 3–17 | Jun 28–Jul 12 (transplant) Jun 28–Jul 12 (sow outdoors) | – |
| Celery | Mar 22–Apr 5 | Jun 21–28 (transplant) | – |
| Basil | May 3–17 | Jun 21–Jul 5 (transplant) Jun 21–Jul 5 (sow outdoors) | – |
| Cilantro | – | May 31–Jun 28 (sow outdoors) | Jul 7–21 (sowing) |
| Parsley | Apr 5–19 | May 31–Jun 14 (transplant) May 24–Jun 14 (sow outdoors) | – |
| Dill | – | Jun 14–28 (sow outdoors) | Jul 7–21 (sowing) |
| Sunflower | – | Jun 14–28 (sow outdoors) | – |
| Asparagus (crowns) | – | May 17–31 (transplant) | – |
| Rhubarb (crowns) | – | May 17–31 (transplant) | – |
| Strawberry (plants) | – | May 17–31 (transplant) | Jun 23–Jul 21 (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: Randolph, UT (NOAA GHCN-Daily ID USC00427165), elevation 6,290 ft, 4.2 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Laketown, UT | 15 mi | May 28 | Sep 24 |
| Bear Lake Sp, UT | 24 mi | May 15 | Oct 4 |
| Evanston Burns Fld, WY | 29 mi | Jun 3 | Sep 25 |
The average last-frost dates of these stations span 30 days, a rough guide to local variation. See data sources & methods.
Frost questions for 84064
When is the last frost in 84064?
The average (50% chance) last spring freeze of 32°F for ZIP 84064 is June 14. For a more cautious planting date, use June 30, when only 1 year in 10 still sees a later freeze.
When is the first frost in 84064?
The average first fall freeze is September 1. In 1 year in 10 it comes by August 18.
What hardiness zone is 84064?
ZIP 84064 is in USDA zone 4a (-30 to -25°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 84064 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
84038 Garden 84086 Woodruff 84028 Garden 84319 Hyrum 83287 83116 Kemmerer 83114 Taylor 84321 Logan
Other ZIP codes in Rich County
84028 84038 84086 All Rich County frost dates · Utah 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.