Fall in zone 3aPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 55782 (Soudan, MN)
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, Babbitt, MN (14 miles away).
- Average last spring frostMay 2850% chance of a 32°F freeze after this date
- Average first fall frostSep 1450% chance of a 32°F freeze by this date
- Growing season (frost-free)108 daysmedian, 32°F threshold
- USDA hardiness zone3a-40 to -35°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
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 55782 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 11 |
| 50% (the "average" last frost) | May 28 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 16 |
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 29 |
| 50% (the "average" first frost) | Sep 14 |
| 90% (late: most years have frozen by now) | Sep 29 |
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) | May 28 | Sep 14 |
| 28°F (hard freeze) | May 13 | Sep 26 |
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 55782
Dates count from your average last spring frost (May 28) and first fall frost (Sep 14). 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 2–16 | Jun 4–18 (transplant) | – |
| Pepper (sweet and hot) | Mar 19–Apr 2 | Jun 11–25 (transplant) | – |
| Eggplant | Mar 19–Apr 2 | Jun 11–25 (transplant) | – |
| Tomatillo | Apr 2–16 | Jun 4–18 (transplant) | – |
| Lettuce | Apr 2–16 | May 7–28 (transplant) Apr 30–Jun 11 (sow outdoors) | Jul 20–Aug 10 (transplant) Jul 6–Aug 3 (sowing) |
| Spinach | – | Apr 16–May 7 (sow outdoors) | Jul 20–Aug 10 (sowing) |
| Kale | Apr 2–16 | Apr 30–May 14 (transplant) Apr 30–May 14 (sow outdoors) | Jun 22–Jul 20 (transplant) Jun 8–Jul 6 (sowing) |
| Collards | Apr 2–16 | Apr 30–May 28 (transplant) Apr 30–May 28 (sow outdoors) | Jun 22–Jul 20 (transplant) Jun 8–Jul 6 (sowing) |
| Broccoli | Mar 19–Apr 2 | Apr 30–May 14 (transplant) | Jun 8–Jul 6 (transplant) |
| Cabbage | Mar 19–Apr 2 | Apr 30–May 14 (transplant) | Jun 8–Jul 6 (transplant) |
| Cauliflower | Mar 19–Apr 2 | May 14–28 (transplant) | Jun 8–Jul 6 (transplant) |
| Brussels sprouts | Mar 5–19 | Apr 30–May 14 (transplant) | May 25–Jun 15 (transplant) |
| Kohlrabi | Apr 2–16 | Apr 30–May 14 (transplant) Apr 30–May 14 (sow outdoors) | Jul 6–20 (sowing) |
| Bok choy / Asian greens | – | Apr 30–May 14 (sow outdoors) | Jul 20–Aug 3 (sowing) |
| Arugula | – | Apr 30–May 28 (sow outdoors) | Jul 20–Aug 17 (sowing) |
| Mustard greens | – | Apr 30–May 21 (sow outdoors) | Jul 20–Aug 3 (sowing) |
| Swiss chard | Apr 16–30 | May 14–Jun 4 (transplant) May 14–Jun 11 (sow outdoors) | Jul 6–20 (sowing) |
| Beet | – | Apr 30–May 28 (sow outdoors) | Jul 6–20 (sowing) |
| Carrot | – | May 7–Jun 4 (sow outdoors) | Jun 22–Jul 6 (sowing) |
| Radish | – | Apr 23–Jun 4 (sow outdoors) | Aug 3–17 (sowing) |
| Turnip | – | Apr 30–May 21 (sow outdoors) | Jul 6–20 (sowing) |
| Parsnip | – | May 7–28 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 2–30 (sow outdoors) | Jun 22–Jul 6 (sowing) |
| Onion (bulbing) | Mar 5–19 | Apr 16–30 (transplant) | – |
| Green onion / scallion | – | Apr 16–May 14 (sow outdoors) | Jul 6–20 (sowing) |
| Leek | Mar 5–19 | Apr 30–May 14 (transplant) | – |
| Garlic | – | – | Aug 3–31 (sowing) |
| Shallot | – | Apr 16–30 (transplant) | Aug 3–31 (sowing) |
| Potato | – | Apr 30–May 14 (transplant) | May 25–Jun 8 (transplant) |
| Sweet potato | – | Jun 18–Jul 2 (transplant) | – |
| Sweet corn | – | Jun 4–18 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 4–18 (sow outdoors) | – |
| Bean, pole | – | Jun 4–18 (sow outdoors) | – |
| Lima bean | – | Jun 11–25 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 18–Jul 9 (sow outdoors) | – |
| Cucumber | Apr 30–May 7 | Jun 4–18 (transplant) Jun 4–18 (sow outdoors) | – |
| Summer squash / zucchini | Apr 30–May 7 | Jun 4–18 (transplant) Jun 4–18 (sow outdoors) | – |
| Winter squash | Apr 30–May 7 | Jun 4–18 (transplant) Jun 4–18 (sow outdoors) | – |
| Pumpkin | – | Jun 4–18 (sow outdoors) | – |
| Watermelon | Apr 30–May 7 | Jun 11–25 (transplant) Jun 11–25 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 30–May 7 | Jun 11–25 (transplant) Jun 11–25 (sow outdoors) | – |
| Okra | Apr 16–30 | Jun 11–25 (transplant) Jun 11–25 (sow outdoors) | – |
| Celery | Mar 5–19 | Jun 4–11 (transplant) | – |
| Basil | Apr 16–30 | Jun 4–18 (transplant) Jun 4–18 (sow outdoors) | – |
| Cilantro | – | May 14–Jun 11 (sow outdoors) | Jul 20–Aug 3 (sowing) |
| Parsley | Mar 19–Apr 2 | May 14–28 (transplant) May 7–28 (sow outdoors) | – |
| Dill | – | May 28–Jun 11 (sow outdoors) | Jul 20–Aug 3 (sowing) |
| Sunflower | – | May 28–Jun 11 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 30–May 14 (transplant) | – |
| Rhubarb (crowns) | – | Apr 30–May 14 (transplant) | – |
| Strawberry (plants) | – | Apr 30–May 14 (transplant) | Jul 6–Aug 3 (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: Babbitt, MN (NOAA GHCN-Daily ID USC00210387), elevation 1,481 ft, 14.4 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Cook 8NE, MN | 16 mi | May 12 | Oct 1 |
| Ely, MN | 17 mi | May 24 | Sep 23 |
| Ely, MN | 18 mi | May 14 | Sep 29 |
The average last-frost dates of these stations span 16 days, a rough guide to local variation. See data sources & methods.
Frost questions for 55782
When is the last frost in 55782?
The average (50% chance) last spring freeze of 32°F for ZIP 55782 is May 28. For a more cautious planting date, use June 16, when only 1 year in 10 still sees a later freeze.
When is the first frost in 55782?
The average first fall freeze is September 14. In 1 year in 10 it comes by August 29.
What hardiness zone is 55782?
ZIP 55782 is in USDA zone 3a (-40 to -35°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 55782 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
55790 Tower 55732 55706 Babbitt 55796 Winton 55792 Virginia 55708 Biwabik 55750 Hoyt Lakes 55731 Ely
Other ZIP codes in St. Louis County
55602 55702 55703 55705 55706 55708 55710 55711 55713 55717 55719 55723 55724 55725 55732 55734 55736 55738 55741 55746 55750 55751 55758 55763 All St. Louis County frost dates · Minnesota frost dates
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Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- 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.