Fall in zone 4bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 59462 (Moccasin, MT)
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, Moccasin EXP STN, MT (4 miles away).
- Average last spring frostMay 2850% chance of a 32°F freeze after this date
- Average first fall frostSep 2050% chance of a 32°F freeze by this date
- Growing season (frost-free)112 daysmedian, 32°F threshold
- USDA hardiness zone4b-25 to -20°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
44°F Below 50°F
24-hour average · latest 44°F, as of Oct 18, 2:00 AM CDT
Measured at USDA NRCS SCAN station Moccasin, 4 mi away. Daily averages: Thu 38°, Fri 40°, Sat 44°.
4-inch depth
44°F Below 50°F
24-hour average · latest 45°F, as of Oct 18, 2:00 AM CDT
Measured at USDA NRCS SCAN station Moccasin, 4 mi away. Daily averages: Thu 39°, Fri 40°, Sat 44°.
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 59462 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 44°F at 4 inches. 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 13 |
| 50% (the "average" last frost) | May 28 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 19 |
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 20 |
| 90% (late: most years have frozen by now) | Oct 2 |
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 20 |
| 28°F (hard freeze) | May 12 | Sep 30 |
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 59462
Dates count from your average last spring frost (May 28) and first fall frost (Sep 20). 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 26–Aug 16 (transplant) Jul 12–Aug 9 (sowing) |
| Spinach | – | Apr 16–May 7 (sow outdoors) | Jul 26–Aug 16 (sowing) |
| Kale | Apr 2–16 | Apr 30–May 14 (transplant) Apr 30–May 14 (sow outdoors) | Jun 28–Jul 26 (transplant) Jun 14–Jul 12 (sowing) |
| Collards | Apr 2–16 | Apr 30–May 28 (transplant) Apr 30–May 28 (sow outdoors) | Jun 28–Jul 26 (transplant) Jun 14–Jul 12 (sowing) |
| Broccoli | Mar 19–Apr 2 | Apr 30–May 14 (transplant) | Jun 14–Jul 12 (transplant) |
| Cabbage | Mar 19–Apr 2 | Apr 30–May 14 (transplant) | Jun 14–Jul 12 (transplant) |
| Cauliflower | Mar 19–Apr 2 | May 14–28 (transplant) | Jun 14–Jul 12 (transplant) |
| Brussels sprouts | Mar 5–19 | Apr 30–May 14 (transplant) | May 31–Jun 21 (transplant) |
| Kohlrabi | Apr 2–16 | Apr 30–May 14 (transplant) Apr 30–May 14 (sow outdoors) | Jul 12–26 (sowing) |
| Bok choy / Asian greens | – | Apr 30–May 14 (sow outdoors) | Jul 26–Aug 9 (sowing) |
| Arugula | – | Apr 30–May 28 (sow outdoors) | Jul 26–Aug 23 (sowing) |
| Mustard greens | – | Apr 30–May 21 (sow outdoors) | Jul 26–Aug 9 (sowing) |
| Swiss chard | Apr 16–30 | May 14–Jun 4 (transplant) May 14–Jun 11 (sow outdoors) | Jul 12–26 (sowing) |
| Beet | – | Apr 30–May 28 (sow outdoors) | Jul 12–26 (sowing) |
| Carrot | – | May 7–Jun 4 (sow outdoors) | Jun 28–Jul 12 (sowing) |
| Radish | – | Apr 23–Jun 4 (sow outdoors) | Aug 9–23 (sowing) |
| Turnip | – | Apr 30–May 21 (sow outdoors) | Jul 12–26 (sowing) |
| Parsnip | – | May 7–28 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 2–30 (sow outdoors) | Jun 28–Jul 12 (sowing) |
| Onion (bulbing) | Mar 5–19 | Apr 16–30 (transplant) | – |
| Green onion / scallion | – | Apr 16–May 14 (sow outdoors) | Jul 12–26 (sowing) |
| Leek | Mar 5–19 | Apr 30–May 14 (transplant) | – |
| Garlic | – | – | Aug 9–Sep 6 (sowing) |
| Shallot | – | Apr 16–30 (transplant) | Aug 9–Sep 6 (sowing) |
| Potato | – | Apr 30–May 14 (transplant) | May 31–Jun 14 (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 26–Aug 9 (sowing) |
| Parsley | Mar 19–Apr 2 | May 14–28 (transplant) May 7–28 (sow outdoors) | – |
| Dill | – | May 28–Jun 11 (sow outdoors) | Jul 26–Aug 9 (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 12–Aug 9 (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: Moccasin EXP STN, MT (NOAA GHCN-Daily ID USC00245761), elevation 4,300 ft, 4.3 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Denton, MT | 15 mi | Jun 1 | Sep 11 |
| Stanford, MT | 16 mi | May 25 | Sep 21 |
| Lewistown Muni AP, MT | 21 mi | May 23 | Sep 21 |
The average last-frost dates of these stations span 9 days, a rough guide to local variation. See data sources & methods.
Frost questions for 59462
When is the last frost in 59462?
The average (50% chance) last spring freeze of 32°F for ZIP 59462 is May 28. For a more cautious planting date, use June 19, when only 1 year in 10 still sees a later freeze.
When is the first frost in 59462?
The average first fall freeze is September 20. In 1 year in 10 it comes by September 4.
What hardiness zone is 59462?
ZIP 59462 is in USDA zone 4b (-25 to -20°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 59462 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
59452 Sapphire Ridge 59424 Coffee Creek 59479 Stanford 59418 59464 Moore 59430 Denton 59457 Lewistown 59447 Geyser
Other ZIP codes in Judith Basin County
59418 59447 59452 59469 59479 All Judith Basin County frost dates · Montana frost dates
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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.