Fall in zone 5aPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 69346 (Harrison, NE)
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, Harrison, NE (6 miles away).
- Average last spring frostMay 2050% 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)121 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 18, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
45°F Below 50°F
24-hour average · latest 43°F, as of Oct 18, 2:00 AM CDT
Measured at NOAA USCRN station Harrison 20 SSE, 14 mi away. Daily averages: Thu 48°, Fri 43°, Sat 45°.
4-inch depth
47°F Below 50°F
24-hour average · latest 48°F, as of Oct 18, 2:00 AM CDT
Measured at NOAA USCRN station Harrison 20 SSE, 14 mi away. Daily averages: Thu 51°, Fri 46°, Sat 47°.
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 69346 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 47°F at 4 inches. Fall pre-emergent window is mostly past. Next: spring, when soil reaches 50°F (typically mid-April to early May).
Fertilizer window
Lawn region: North (cool-season). 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 8 |
| 50% (the "average" last frost) | May 20 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 5 |
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 4 |
| 50% (the "average" first frost) | Sep 21 |
| 90% (late: most years have frozen by now) | Oct 5 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 31 | Sep 12 |
| 32°F (freeze) | May 20 | Sep 21 |
| 28°F (hard freeze) | May 9 | Oct 1 |
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 69346
Dates count from your average last spring frost (May 20) 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 | Mar 25–Apr 8 | May 27–Jun 10 (transplant) | – |
| Pepper (sweet and hot) | Mar 11–25 | Jun 3–17 (transplant) | – |
| Eggplant | Mar 11–25 | Jun 3–17 (transplant) | – |
| Tomatillo | Mar 25–Apr 8 | May 27–Jun 10 (transplant) | – |
| Lettuce | Mar 25–Apr 8 | Apr 29–May 20 (transplant) Apr 22–Jun 3 (sow outdoors) | Jul 27–Aug 17 (transplant) Jul 13–Aug 10 (sowing) |
| Spinach | – | Apr 8–29 (sow outdoors) | Jul 27–Aug 17 (sowing) |
| Kale | Mar 25–Apr 8 | Apr 22–May 6 (transplant) Apr 22–May 6 (sow outdoors) | Jun 29–Jul 27 (transplant) Jun 15–Jul 13 (sowing) |
| Collards | Mar 25–Apr 8 | Apr 22–May 20 (transplant) Apr 22–May 20 (sow outdoors) | Jun 29–Jul 27 (transplant) Jun 15–Jul 13 (sowing) |
| Broccoli | Mar 11–25 | Apr 22–May 6 (transplant) | Jun 15–Jul 13 (transplant) |
| Cabbage | Mar 11–25 | Apr 22–May 6 (transplant) | Jun 15–Jul 13 (transplant) |
| Cauliflower | Mar 11–25 | May 6–20 (transplant) | Jun 15–Jul 13 (transplant) |
| Brussels sprouts | Feb 25–Mar 11 | Apr 22–May 6 (transplant) | Jun 1–22 (transplant) |
| Kohlrabi | Mar 25–Apr 8 | Apr 22–May 6 (transplant) Apr 22–May 6 (sow outdoors) | Jul 13–27 (sowing) |
| Bok choy / Asian greens | – | Apr 22–May 6 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Arugula | – | Apr 22–May 20 (sow outdoors) | Jul 27–Aug 24 (sowing) |
| Mustard greens | – | Apr 22–May 13 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Swiss chard | Apr 8–22 | May 6–27 (transplant) May 6–Jun 3 (sow outdoors) | Jul 13–27 (sowing) |
| Beet | – | Apr 22–May 20 (sow outdoors) | Jul 13–27 (sowing) |
| Carrot | – | Apr 29–May 27 (sow outdoors) | Jun 29–Jul 13 (sowing) |
| Radish | – | Apr 15–May 27 (sow outdoors) | Aug 10–24 (sowing) |
| Turnip | – | Apr 22–May 13 (sow outdoors) | Jul 13–27 (sowing) |
| Parsnip | – | Apr 29–May 20 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Mar 25–Apr 22 (sow outdoors) | Jun 29–Jul 13 (sowing) |
| Onion (bulbing) | Feb 25–Mar 11 | Apr 8–22 (transplant) | – |
| Green onion / scallion | – | Apr 8–May 6 (sow outdoors) | Jul 13–27 (sowing) |
| Leek | Feb 25–Mar 11 | Apr 22–May 6 (transplant) | – |
| Garlic | – | – | Aug 10–Sep 7 (sowing) |
| Shallot | – | Apr 8–22 (transplant) | Aug 10–Sep 7 (sowing) |
| Potato | – | Apr 22–May 6 (transplant) | Jun 1–15 (transplant) |
| Sweet potato | – | Jun 10–24 (transplant) | – |
| Sweet corn | – | May 27–Jun 10 (sow outdoors) | – |
| Bean, bush (snap) | – | May 27–Jun 10 (sow outdoors) | – |
| Bean, pole | – | May 27–Jun 10 (sow outdoors) | – |
| Lima bean | – | Jun 3–17 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 10–Jul 1 (sow outdoors) | – |
| Cucumber | Apr 22–29 | May 27–Jun 10 (transplant) May 27–Jun 10 (sow outdoors) | – |
| Summer squash / zucchini | Apr 22–29 | May 27–Jun 10 (transplant) May 27–Jun 10 (sow outdoors) | – |
| Winter squash | Apr 22–29 | May 27–Jun 10 (transplant) May 27–Jun 10 (sow outdoors) | – |
| Pumpkin | – | May 27–Jun 10 (sow outdoors) | – |
| Watermelon | Apr 22–29 | Jun 3–17 (transplant) Jun 3–17 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 22–29 | Jun 3–17 (transplant) Jun 3–17 (sow outdoors) | – |
| Okra | Apr 8–22 | Jun 3–17 (transplant) Jun 3–17 (sow outdoors) | – |
| Celery | Feb 25–Mar 11 | May 27–Jun 3 (transplant) | – |
| Basil | Apr 8–22 | May 27–Jun 10 (transplant) May 27–Jun 10 (sow outdoors) | – |
| Cilantro | – | May 6–Jun 3 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Parsley | Mar 11–25 | May 6–20 (transplant) Apr 29–May 20 (sow outdoors) | – |
| Dill | – | May 20–Jun 3 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Sunflower | – | May 20–Jun 3 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 22–May 6 (transplant) | – |
| Rhubarb (crowns) | – | Apr 22–May 6 (transplant) | – |
| Strawberry (plants) | – | Apr 22–May 6 (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.
Plants that do well here
Nebraska has a university or garden plant program: GreatPlants. Plant frost-tender annuals after May 20 here (the average last frost). Not affiliated with the program.
Where these numbers come from
Station: Harrison, NE (NOAA GHCN-Daily ID USC00253615), elevation 4,850 ft, 6.3 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Harrison 4NW, NE | 10 mi | May 17 | Sep 28 |
| Harrison 9NE, NE | 12 mi | May 12 | Oct 2 |
| Harrison 20 SSE, NE | 14 mi | May 27 | Sep 11 |
The average last-frost dates of these stations span 15 days, a rough guide to local variation. See data sources & methods.
Frost questions for 69346
When is the last frost in 69346?
The average (50% chance) last spring freeze of 32°F for ZIP 69346 is May 20. For a more cautious planting date, use June 5, when only 1 year in 10 still sees a later freeze.
When is the first frost in 69346?
The average first fall freeze is September 21. In 1 year in 10 it comes by September 4.
What hardiness zone is 69346?
ZIP 69346 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 69346 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
82242 Van Tassell 69339 Crawford 69354 69367 Whitney 82225 Lusk 69357 Mitchell 69348 Hemingford 82240 Torrington
Other ZIP codes in Sioux County
69354 69357 69358 69361 All Sioux County frost dates · Nebraska frost dates
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