Frost dates for ZIP 58338 (Hampden, ND)
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, Edmore 4NW, ND (7 miles away).
- Average last spring frostMay 1550% chance of a 32°F freeze after this date
- Average first fall frostSep 2250% chance of a 32°F freeze by this date
- Growing season (frost-free)128 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 17, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
No soil station with a fresh reading within 62 miles.
4-inch depth
No soil station with a fresh reading within 62 miles.
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 58338 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
No soil reading near this ZIP. Typical extension timing for your region: spring 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 4 |
| 50% (the "average" last frost) | May 15 |
| 10% (cautious: only 1 year in 10 freezes later) | May 31 |
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 11 |
| 50% (the "average" first frost) | Sep 22 |
| 90% (late: most years have frozen by now) | Oct 3 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 26 | Sep 15 |
| 32°F (freeze) | May 15 | Sep 22 |
| 28°F (hard freeze) | May 4 | 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 58338
Dates count from your average last spring frost (May 15) and first fall frost (Sep 22). 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 20–Apr 3 | May 22–Jun 5 (transplant) | – |
| Pepper (sweet and hot) | Mar 6–20 | May 29–Jun 12 (transplant) | – |
| Eggplant | Mar 6–20 | May 29–Jun 12 (transplant) | – |
| Tomatillo | Mar 20–Apr 3 | May 22–Jun 5 (transplant) | – |
| Lettuce | Mar 20–Apr 3 | Apr 24–May 15 (transplant) Apr 17–May 29 (sow outdoors) | Jul 28–Aug 18 (transplant) Jul 14–Aug 11 (sowing) |
| Spinach | – | Apr 3–24 (sow outdoors) | Jul 28–Aug 18 (sowing) |
| Kale | Mar 20–Apr 3 | Apr 17–May 1 (transplant) Apr 17–May 1 (sow outdoors) | Jun 30–Jul 28 (transplant) Jun 16–Jul 14 (sowing) |
| Collards | Mar 20–Apr 3 | Apr 17–May 15 (transplant) Apr 17–May 15 (sow outdoors) | Jun 30–Jul 28 (transplant) Jun 16–Jul 14 (sowing) |
| Broccoli | Mar 6–20 | Apr 17–May 1 (transplant) | Jun 16–Jul 14 (transplant) |
| Cabbage | Mar 6–20 | Apr 17–May 1 (transplant) | Jun 16–Jul 14 (transplant) |
| Cauliflower | Mar 6–20 | May 1–15 (transplant) | Jun 16–Jul 14 (transplant) |
| Brussels sprouts | Feb 20–Mar 6 | Apr 17–May 1 (transplant) | Jun 2–23 (transplant) |
| Kohlrabi | Mar 20–Apr 3 | Apr 17–May 1 (transplant) Apr 17–May 1 (sow outdoors) | Jul 14–28 (sowing) |
| Bok choy / Asian greens | – | Apr 17–May 1 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Arugula | – | Apr 17–May 15 (sow outdoors) | Jul 28–Aug 25 (sowing) |
| Mustard greens | – | Apr 17–May 8 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Swiss chard | Apr 3–17 | May 1–22 (transplant) May 1–29 (sow outdoors) | Jul 14–28 (sowing) |
| Beet | – | Apr 17–May 15 (sow outdoors) | Jul 14–28 (sowing) |
| Carrot | – | Apr 24–May 22 (sow outdoors) | Jun 30–Jul 14 (sowing) |
| Radish | – | Apr 10–May 22 (sow outdoors) | Aug 11–25 (sowing) |
| Turnip | – | Apr 17–May 8 (sow outdoors) | Jul 14–28 (sowing) |
| Parsnip | – | Apr 24–May 15 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Mar 20–Apr 17 (sow outdoors) | Jun 30–Jul 14 (sowing) |
| Onion (bulbing) | Feb 20–Mar 6 | Apr 3–17 (transplant) | – |
| Green onion / scallion | – | Apr 3–May 1 (sow outdoors) | Jul 14–28 (sowing) |
| Leek | Feb 20–Mar 6 | Apr 17–May 1 (transplant) | – |
| Garlic | – | – | Aug 11–Sep 8 (sowing) |
| Shallot | – | Apr 3–17 (transplant) | Aug 11–Sep 8 (sowing) |
| Potato | – | Apr 17–May 1 (transplant) | Jun 2–16 (transplant) |
| Sweet potato | – | Jun 5–19 (transplant) | – |
| Sweet corn | – | May 22–Jun 5 (sow outdoors) | – |
| Bean, bush (snap) | – | May 22–Jun 5 (sow outdoors) | – |
| Bean, pole | – | May 22–Jun 5 (sow outdoors) | – |
| Lima bean | – | May 29–Jun 12 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 5–26 (sow outdoors) | – |
| Cucumber | Apr 17–24 | May 22–Jun 5 (transplant) May 22–Jun 5 (sow outdoors) | – |
| Summer squash / zucchini | Apr 17–24 | May 22–Jun 5 (transplant) May 22–Jun 5 (sow outdoors) | – |
| Winter squash | Apr 17–24 | May 22–Jun 5 (transplant) May 22–Jun 5 (sow outdoors) | – |
| Pumpkin | – | May 22–Jun 5 (sow outdoors) | – |
| Watermelon | Apr 17–24 | May 29–Jun 12 (transplant) May 29–Jun 12 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 17–24 | May 29–Jun 12 (transplant) May 29–Jun 12 (sow outdoors) | – |
| Okra | Apr 3–17 | May 29–Jun 12 (transplant) May 29–Jun 12 (sow outdoors) | – |
| Celery | Feb 20–Mar 6 | May 22–29 (transplant) | – |
| Basil | Apr 3–17 | May 22–Jun 5 (transplant) May 22–Jun 5 (sow outdoors) | – |
| Cilantro | – | May 1–29 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Parsley | Mar 6–20 | May 1–15 (transplant) Apr 24–May 15 (sow outdoors) | – |
| Dill | – | May 15–29 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Sunflower | – | May 15–29 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 17–May 1 (transplant) | – |
| Rhubarb (crowns) | – | Apr 17–May 1 (transplant) | – |
| Strawberry (plants) | – | Apr 17–May 1 (transplant) | Jul 14–Aug 11 (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: Edmore 4NW, ND (NOAA GHCN-Daily ID USC00322525), elevation 1,539 ft, 6.9 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Langdon EXP Farm, ND | 21 mi | May 17 | Sep 26 |
| Devils Lake, ND | 31 mi | May 12 | Sep 30 |
| Devils Lake Kdlr, ND | 31 mi | May 6 | Oct 5 |
The average last-frost dates of these stations span 11 days, a rough guide to local variation. See data sources & methods.
Frost questions for 58338
When is the last frost in 58338?
The average (50% chance) last spring freeze of 32°F for ZIP 58338 is May 15. For a more cautious planting date, use May 31, when only 1 year in 10 still sees a later freeze.
When is the first frost in 58338?
The average first fall freeze is September 22. In 1 year in 10 it comes by September 11.
What hardiness zone is 58338?
ZIP 58338 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 58338 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
58311 Loma 58330 Edmore 58355 Nekoma 58377 Starkweather 58352 Calio 58382 58229 Fairdale 58345 Lawton
Other ZIP codes in Ramsey County
58301 58321 58325 58327 58330 58345 58362 58377 58382 All Ramsey County frost dates · North Dakota frost dates
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