Frost dates for ZIP 82930 (Summit County, 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, Mtn View, WY (25 miles away).
Station is a bit far
The nearest station with freeze normals is over 40 km away, so dates here may be off by a week or more.
- Average last spring frostJun 1450% chance of a 32°F freeze after this date
- Average first fall frostSep 950% chance of a 32°F freeze by this date
- Growing season (frost-free)84 daysmedian, 32°F threshold
- USDA hardiness zone5a-20 to -15°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
46°F Below 50°F
24-hour average · latest 48°F, as of Oct 17, 10:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Buffalo Jump (40 mi), Mountain Home (42 mi), Chicken Ridge (44 mi).
4-inch depth
46°F Below 50°F
24-hour average · latest 48°F, as of Oct 17, 10:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Buffalo Jump (40 mi), Mountain Home (42 mi), Chicken Ridge (44 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 82930 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 46°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) | Jul 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) | Aug 23 |
| 50% (the "average" first frost) | Sep 9 |
| 90% (late: most years have frozen by now) | Sep 21 |
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 9 |
| 28°F (hard freeze) | May 30 | Sep 20 |
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 82930
Dates count from your average last spring frost (Jun 14) and first fall frost (Sep 9). 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 15–Aug 5 (transplant) Jul 1–29 (sowing) |
| Spinach | – | May 3–24 (sow outdoors) | Jul 15–Aug 5 (sowing) |
| Kale | Apr 19–May 3 | May 17–31 (transplant) May 17–31 (sow outdoors) | Jun 17–Jul 15 (transplant) Jun 3–Jul 1 (sowing) |
| Collards | Apr 19–May 3 | May 17–Jun 14 (transplant) May 17–Jun 14 (sow outdoors) | Jun 17–Jul 15 (transplant) |
| Broccoli | Apr 5–19 | May 17–31 (transplant) | Jun 3–Jul 1 (transplant) |
| Cabbage | Apr 5–19 | May 17–31 (transplant) | Jun 3–Jul 1 (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) | Jul 1–15 (sowing) |
| Bok choy / Asian greens | – | May 17–31 (sow outdoors) | Jul 15–29 (sowing) |
| Arugula | – | May 17–Jun 14 (sow outdoors) | Jul 15–Aug 12 (sowing) |
| Mustard greens | – | May 17–Jun 7 (sow outdoors) | Jul 15–29 (sowing) |
| Swiss chard | May 3–17 | May 31–Jun 21 (transplant) May 31–Jun 28 (sow outdoors) | Jul 1–15 (sowing) |
| Beet | – | May 17–Jun 14 (sow outdoors) | Jul 1–15 (sowing) |
| Carrot | – | May 24–Jun 21 (sow outdoors) | – |
| Radish | – | May 10–Jun 21 (sow outdoors) | Jul 29–Aug 12 (sowing) |
| Turnip | – | May 17–Jun 7 (sow outdoors) | Jul 1–15 (sowing) |
| Parsnip | – | May 24–Jun 14 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 19–May 17 (sow outdoors) | Jun 17–Jul 1 (sowing) |
| Onion (bulbing) | Mar 22–Apr 5 | May 3–17 (transplant) | – |
| Green onion / scallion | – | May 3–31 (sow outdoors) | Jul 1–15 (sowing) |
| Leek | Mar 22–Apr 5 | May 17–31 (transplant) | – |
| Garlic | – | – | Jul 29–Aug 26 (sowing) |
| Shallot | – | May 3–17 (transplant) | Jul 29–Aug 26 (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 15–29 (sowing) |
| Parsley | Apr 5–19 | May 31–Jun 14 (transplant) May 24–Jun 14 (sow outdoors) | – |
| Dill | – | Jun 14–28 (sow outdoors) | Jul 15–29 (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) | Jul 1–29 (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: Mtn View, WY (NOAA GHCN-Daily ID USC00486555), elevation 6,800 ft, 25.5 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Evanston 1 E, WY | 28 mi | Jun 12 | Sep 12 |
| Moon Lake, UT | 28 mi | Jun 11 | Sep 18 |
| Evanston Burns Fld, WY | 31 mi | Jun 3 | Sep 25 |
The average last-frost dates of these stations span 11 days, a rough guide to local variation. See data sources & methods.
Frost questions for 82930
When is the last frost in 82930?
The average (50% chance) last spring freeze of 32°F for ZIP 82930 is June 14. For a more cautious planting date, use July 1, when only 1 year in 10 still sees a later freeze.
When is the first frost in 82930?
The average first fall freeze is September 9. In 1 year in 10 it comes by August 23.
What hardiness zone is 82930?
ZIP 82930 is in USDA zone 5a (-20 to -15°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 82930 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
82944 Robertson 84031 82933 Fort Bridger 82939 Carter 82936 Lonetree 84036 Marion 84017 Coalville 84055 Oakley
Other ZIP codes in Summit County
84017 84024 84033 84036 84055 84060 84061 84098 All Summit County frost dates · Utah frost dates
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