Fall in zone 4bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 59732 (Glen, 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, Divide, MT (18 miles away).
- Average last spring frostJun 1050% chance of a 32°F freeze after this date
- Average first fall frostSep 750% chance of a 32°F freeze by this date
- Growing season (frost-free)85 daysmedian, 32°F threshold
- USDA hardiness zone4b-25 to -20°F avg. coldest night
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Frost and freeze alerts from the NWS forecast for 59732, the spring soil-temperature heads-up for pre-emergent, and a short weekly yard-timing email.
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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
40°F Below 50°F
24-hour average · latest 41°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Dillon 18 WSW (28 mi), Table Mountain (57 mi).
4-inch depth
40°F Below 50°F
24-hour average · latest 42°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Dillon 18 WSW (28 mi), Table Mountain (57 mi).
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 59732 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 40°F at 4 inches (estimated soil temperature, not a station reading). 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 23 |
| 50% (the "average" last frost) | Jun 10 |
| 10% (cautious: only 1 year in 10 freezes later) | Jul 2 |
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 24 |
| 50% (the "average" first frost) | Sep 7 |
| 90% (late: most years have frozen by now) | Sep 20 |
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 10 | Sep 7 |
| 28°F (hard freeze) | May 21 | Sep 19 |
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 59732
Dates count from your average last spring frost (Jun 10) and first fall frost (Sep 7). 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 15–29 | Jun 17–Jul 1 (transplant) | – |
| Pepper (sweet and hot) | Apr 1–15 | Jun 24–Jul 8 (transplant) | – |
| Eggplant | Apr 1–15 | Jun 24–Jul 8 (transplant) | – |
| Tomatillo | Apr 15–29 | Jun 17–Jul 1 (transplant) | – |
| Lettuce | Apr 15–29 | May 20–Jun 10 (transplant) May 13–Jun 24 (sow outdoors) | Jul 13–Aug 3 (transplant) Jun 29–Jul 27 (sowing) |
| Spinach | – | Apr 29–May 20 (sow outdoors) | Jul 13–Aug 3 (sowing) |
| Kale | Apr 15–29 | May 13–27 (transplant) May 13–27 (sow outdoors) | Jun 15–Jul 13 (transplant) Jun 1–29 (sowing) |
| Collards | Apr 15–29 | May 13–Jun 10 (transplant) May 13–Jun 10 (sow outdoors) | Jun 15–Jul 13 (transplant) |
| Broccoli | Apr 1–15 | May 13–27 (transplant) | Jun 1–29 (transplant) |
| Cabbage | Apr 1–15 | May 13–27 (transplant) | Jun 1–29 (transplant) |
| Cauliflower | Apr 1–15 | May 27–Jun 10 (transplant) | – |
| Brussels sprouts | Mar 18–Apr 1 | May 13–27 (transplant) | – |
| Kohlrabi | Apr 15–29 | May 13–27 (transplant) May 13–27 (sow outdoors) | Jun 29–Jul 13 (sowing) |
| Bok choy / Asian greens | – | May 13–27 (sow outdoors) | Jul 13–27 (sowing) |
| Arugula | – | May 13–Jun 10 (sow outdoors) | Jul 13–Aug 10 (sowing) |
| Mustard greens | – | May 13–Jun 3 (sow outdoors) | Jul 13–27 (sowing) |
| Swiss chard | Apr 29–May 13 | May 27–Jun 17 (transplant) May 27–Jun 24 (sow outdoors) | Jun 29–Jul 13 (sowing) |
| Beet | – | May 13–Jun 10 (sow outdoors) | Jun 29–Jul 13 (sowing) |
| Carrot | – | May 20–Jun 17 (sow outdoors) | – |
| Radish | – | May 6–Jun 17 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Turnip | – | May 13–Jun 3 (sow outdoors) | Jun 29–Jul 13 (sowing) |
| Parsnip | – | May 20–Jun 10 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 15–May 13 (sow outdoors) | Jun 15–29 (sowing) |
| Onion (bulbing) | Mar 18–Apr 1 | Apr 29–May 13 (transplant) | – |
| Green onion / scallion | – | Apr 29–May 27 (sow outdoors) | Jun 29–Jul 13 (sowing) |
| Leek | Mar 18–Apr 1 | May 13–27 (transplant) | – |
| Garlic | – | – | Jul 27–Aug 24 (sowing) |
| Shallot | – | Apr 29–May 13 (transplant) | Jul 27–Aug 24 (sowing) |
| Potato | – | May 13–27 (transplant) | – |
| Sweet potato | – | Jul 1–15 (transplant) | – |
| Sweet corn | – | Jun 17–Jul 1 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 17–Jul 1 (sow outdoors) | – |
| Bean, pole | – | Jun 17–Jul 1 (sow outdoors) | – |
| Lima bean | – | Jun 24–Jul 8 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jul 1–22 (sow outdoors) | – |
| Cucumber | May 13–20 | Jun 17–Jul 1 (transplant) Jun 17–Jul 1 (sow outdoors) | – |
| Summer squash / zucchini | May 13–20 | Jun 17–Jul 1 (transplant) Jun 17–Jul 1 (sow outdoors) | – |
| Winter squash | May 13–20 | Jun 17–Jul 1 (transplant) Jun 17–Jul 1 (sow outdoors) | – |
| Pumpkin | – | Jun 17–Jul 1 (sow outdoors) | – |
| Watermelon | May 13–20 | Jun 24–Jul 8 (transplant) Jun 24–Jul 8 (sow outdoors) | – |
| Cantaloupe / muskmelon | May 13–20 | Jun 24–Jul 8 (transplant) Jun 24–Jul 8 (sow outdoors) | – |
| Okra | Apr 29–May 13 | Jun 24–Jul 8 (transplant) Jun 24–Jul 8 (sow outdoors) | – |
| Celery | Mar 18–Apr 1 | Jun 17–24 (transplant) | – |
| Basil | Apr 29–May 13 | Jun 17–Jul 1 (transplant) Jun 17–Jul 1 (sow outdoors) | – |
| Cilantro | – | May 27–Jun 24 (sow outdoors) | Jul 13–27 (sowing) |
| Parsley | Apr 1–15 | May 27–Jun 10 (transplant) May 20–Jun 10 (sow outdoors) | – |
| Dill | – | Jun 10–24 (sow outdoors) | Jul 13–27 (sowing) |
| Sunflower | – | Jun 10–24 (sow outdoors) | – |
| Asparagus (crowns) | – | May 13–27 (transplant) | – |
| Rhubarb (crowns) | – | May 13–27 (transplant) | – |
| Strawberry (plants) | – | May 13–27 (transplant) | Jun 29–Jul 27 (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: Divide, MT (NOAA GHCN-Daily ID USC00242421), elevation 5,350 ft, 17.6 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Twin Bridges, MT | 18 mi | Jun 8 | Sep 2 |
| Dillon AP, MT | 18 mi | Jun 2 | Sep 13 |
| Dillon U Of Montana Western, MT | 20 mi | Jun 5 | Sep 13 |
The average last-frost dates of these stations span 8 days, a rough guide to local variation. See data sources & methods.
Frost questions for 59732
When is the last frost in 59732?
The average (50% chance) last spring freeze of 32°F for ZIP 59732 is June 10. For a more cautious planting date, use July 2, when only 1 year in 10 still sees a later freeze.
When is the first frost in 59732?
The average first fall freeze is September 7. In 1 year in 10 it comes by August 24.
What hardiness zone is 59732?
ZIP 59732 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 59732 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
59743 Butte-Silver Bow (balance) 59754 Twin Bridges 59746 Maverick Mountain 59727 Butte-Silver Bow (balance) 59751 Silver Star 59750 Butte-Silver Bow (balance) 59749 Sheridan 59725 Dillon
Other ZIP codes in Beaverhead County
59724 59725 59736 59739 59743 59746 59761 All Beaverhead County frost dates · Montana 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.