Frost dates for ZIP 55781 (Itasca County, 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, Celina 2E, MN (13 miles away).
- Average last spring frostJun 150% chance of a 32°F freeze after this date
- Average first fall frostSep 1550% chance of a 32°F freeze by this date
- Growing season (frost-free)104 daysmedian, 32°F threshold
- USDA hardiness zone3b-35 to -30°F avg. coldest night
This week in your yard
As of Oct 18, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Fall in zone 3b
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 55781 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 18 |
| 50% (the "average" last frost) | Jun 1 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 18 |
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 27 |
| 50% (the "average" first frost) | Sep 15 |
| 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) | Jun 1 | Sep 15 |
| 28°F (hard freeze) | May 20 | Sep 27 |
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 55781
Dates count from your average last spring frost (Jun 1) and first fall frost (Sep 15). 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 6–20 | Jun 8–22 (transplant) | – |
| Pepper (sweet and hot) | Mar 23–Apr 6 | Jun 15–29 (transplant) | – |
| Eggplant | Mar 23–Apr 6 | Jun 15–29 (transplant) | – |
| Tomatillo | Apr 6–20 | Jun 8–22 (transplant) | – |
| Lettuce | Apr 6–20 | May 11–Jun 1 (transplant) May 4–Jun 15 (sow outdoors) | Jul 21–Aug 11 (transplant) Jul 7–Aug 4 (sowing) |
| Spinach | – | Apr 20–May 11 (sow outdoors) | Jul 21–Aug 11 (sowing) |
| Kale | Apr 6–20 | May 4–18 (transplant) May 4–18 (sow outdoors) | Jun 23–Jul 21 (transplant) Jun 9–Jul 7 (sowing) |
| Collards | Apr 6–20 | May 4–Jun 1 (transplant) May 4–Jun 1 (sow outdoors) | Jun 23–Jul 21 (transplant) Jun 9–Jul 7 (sowing) |
| Broccoli | Mar 23–Apr 6 | May 4–18 (transplant) | Jun 9–Jul 7 (transplant) |
| Cabbage | Mar 23–Apr 6 | May 4–18 (transplant) | Jun 9–Jul 7 (transplant) |
| Cauliflower | Mar 23–Apr 6 | May 18–Jun 1 (transplant) | Jun 9–Jul 7 (transplant) |
| Brussels sprouts | Mar 9–23 | May 4–18 (transplant) | May 26–Jun 16 (transplant) |
| Kohlrabi | Apr 6–20 | May 4–18 (transplant) May 4–18 (sow outdoors) | Jul 7–21 (sowing) |
| Bok choy / Asian greens | – | May 4–18 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Arugula | – | May 4–Jun 1 (sow outdoors) | Jul 21–Aug 18 (sowing) |
| Mustard greens | – | May 4–25 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Swiss chard | Apr 20–May 4 | May 18–Jun 8 (transplant) May 18–Jun 15 (sow outdoors) | Jul 7–21 (sowing) |
| Beet | – | May 4–Jun 1 (sow outdoors) | Jul 7–21 (sowing) |
| Carrot | – | May 11–Jun 8 (sow outdoors) | Jun 23–Jul 7 (sowing) |
| Radish | – | Apr 27–Jun 8 (sow outdoors) | Aug 4–18 (sowing) |
| Turnip | – | May 4–25 (sow outdoors) | Jul 7–21 (sowing) |
| Parsnip | – | May 11–Jun 1 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 6–May 4 (sow outdoors) | Jun 23–Jul 7 (sowing) |
| Onion (bulbing) | Mar 9–23 | Apr 20–May 4 (transplant) | – |
| Green onion / scallion | – | Apr 20–May 18 (sow outdoors) | Jul 7–21 (sowing) |
| Leek | Mar 9–23 | May 4–18 (transplant) | – |
| Garlic | – | – | Aug 4–Sep 1 (sowing) |
| Shallot | – | Apr 20–May 4 (transplant) | Aug 4–Sep 1 (sowing) |
| Potato | – | May 4–18 (transplant) | May 26–Jun 9 (transplant) |
| Sweet potato | – | Jun 22–Jul 6 (transplant) | – |
| Sweet corn | – | Jun 8–22 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 8–22 (sow outdoors) | – |
| Bean, pole | – | Jun 8–22 (sow outdoors) | – |
| Lima bean | – | Jun 15–29 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 22–Jul 13 (sow outdoors) | – |
| Cucumber | May 4–11 | Jun 8–22 (transplant) Jun 8–22 (sow outdoors) | – |
| Summer squash / zucchini | May 4–11 | Jun 8–22 (transplant) Jun 8–22 (sow outdoors) | – |
| Winter squash | May 4–11 | Jun 8–22 (transplant) Jun 8–22 (sow outdoors) | – |
| Pumpkin | – | Jun 8–22 (sow outdoors) | – |
| Watermelon | May 4–11 | Jun 15–29 (transplant) Jun 15–29 (sow outdoors) | – |
| Cantaloupe / muskmelon | May 4–11 | Jun 15–29 (transplant) Jun 15–29 (sow outdoors) | – |
| Okra | Apr 20–May 4 | Jun 15–29 (transplant) Jun 15–29 (sow outdoors) | – |
| Celery | Mar 9–23 | Jun 8–15 (transplant) | – |
| Basil | Apr 20–May 4 | Jun 8–22 (transplant) Jun 8–22 (sow outdoors) | – |
| Cilantro | – | May 18–Jun 15 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Parsley | Mar 23–Apr 6 | May 18–Jun 1 (transplant) May 11–Jun 1 (sow outdoors) | – |
| Dill | – | Jun 1–15 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Sunflower | – | Jun 1–15 (sow outdoors) | – |
| Asparagus (crowns) | – | May 4–18 (transplant) | – |
| Rhubarb (crowns) | – | May 4–18 (transplant) | – |
| Strawberry (plants) | – | May 4–18 (transplant) | Jul 7–Aug 4 (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: Celina 2E, MN (NOAA GHCN-Daily ID USC00211422), elevation 1,285 ft, 12.9 miles from the ZIP's center point. NOAA completeness flag: E (estimated from nearby stations).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Hibbing Chisholm Hibbing AP, MN | 23 mi | Jun 5 | Sep 8 |
| Marcell 5NE, MN | 28 mi | May 14 | Oct 2 |
| Cook 8NE, MN | 29 mi | May 12 | Oct 1 |
The average last-frost dates of these stations span 24 days, a rough guide to local variation. See data sources & methods.
Frost questions for 55781
When is the last frost in 55781?
The average (50% chance) last spring freeze of 32°F for ZIP 55781 is June 1. For a more cautious planting date, use June 18, when only 1 year in 10 still sees a later freeze.
When is the first frost in 55781?
The average first fall freeze is September 15. In 1 year in 10 it comes by August 27.
What hardiness zone is 55781?
ZIP 55781 is in USDA zone 3b (-35 to -30°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 55781 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
55719 Chisholm 55723 Cook 55769 Nashwauk 55703 55710 Mountain Iron 55713 Buhl 55753 Keewatin 55758 Kinney
Other ZIP codes in Itasca County
55709 55716 55721 55722 55742 55744 55753 55764 55769 55775 55784 55786 55793 56628 56636 56637 56639 56657 56659 56680 56681 56688 All Itasca County frost dates · Minnesota frost dates
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