Fall in zone 4bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 59411 (Babb, 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, St. Mary 1 SSW, MT (11 miles away).
- Average last spring frostJun 350% chance of a 32°F freeze after this date
- Average first fall frostSep 850% chance of a 32°F freeze by this date
- Growing season (frost-free)94 daysmedian, 32°F threshold
- USDA hardiness zone4b-25 to -20°F avg. coldest night
Get The Dial for 59411 (Babb)
Frost and freeze alerts from the NWS forecast for 59411, the spring soil-temperature heads-up for pre-emergent, and a short weekly yard-timing email.
- Freeze alerts
- Soil-temp heads-up
- Weekly yard to-dos
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.
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 59411 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 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 19 |
| 50% (the "average" last frost) | Jun 3 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 23 |
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 22 |
| 50% (the "average" first frost) | Sep 8 |
| 90% (late: most years have frozen by now) | Sep 26 |
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 3 | Sep 8 |
| 28°F (hard freeze) | May 14 | Sep 25 |
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 59411
Dates count from your average last spring frost (Jun 3) and first fall frost (Sep 8). 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 8–22 | Jun 10–24 (transplant) | – |
| Pepper (sweet and hot) | Mar 25–Apr 8 | Jun 17–Jul 1 (transplant) | – |
| Eggplant | Mar 25–Apr 8 | Jun 17–Jul 1 (transplant) | – |
| Tomatillo | Apr 8–22 | Jun 10–24 (transplant) | – |
| Lettuce | Apr 8–22 | May 13–Jun 3 (transplant) May 6–Jun 17 (sow outdoors) | Jul 14–Aug 4 (transplant) Jun 30–Jul 28 (sowing) |
| Spinach | – | Apr 22–May 13 (sow outdoors) | Jul 14–Aug 4 (sowing) |
| Kale | Apr 8–22 | May 6–20 (transplant) May 6–20 (sow outdoors) | Jun 16–Jul 14 (transplant) Jun 2–30 (sowing) |
| Collards | Apr 8–22 | May 6–Jun 3 (transplant) May 6–Jun 3 (sow outdoors) | Jun 16–Jul 14 (transplant) |
| Broccoli | Mar 25–Apr 8 | May 6–20 (transplant) | Jun 2–30 (transplant) |
| Cabbage | Mar 25–Apr 8 | May 6–20 (transplant) | Jun 2–30 (transplant) |
| Cauliflower | Mar 25–Apr 8 | May 20–Jun 3 (transplant) | – |
| Brussels sprouts | Mar 11–25 | May 6–20 (transplant) | – |
| Kohlrabi | Apr 8–22 | May 6–20 (transplant) May 6–20 (sow outdoors) | Jun 30–Jul 14 (sowing) |
| Bok choy / Asian greens | – | May 6–20 (sow outdoors) | Jul 14–28 (sowing) |
| Arugula | – | May 6–Jun 3 (sow outdoors) | Jul 14–Aug 11 (sowing) |
| Mustard greens | – | May 6–27 (sow outdoors) | Jul 14–28 (sowing) |
| Swiss chard | Apr 22–May 6 | May 20–Jun 10 (transplant) May 20–Jun 17 (sow outdoors) | Jun 30–Jul 14 (sowing) |
| Beet | – | May 6–Jun 3 (sow outdoors) | Jun 30–Jul 14 (sowing) |
| Carrot | – | May 13–Jun 10 (sow outdoors) | Jun 16–30 (sowing) |
| Radish | – | Apr 29–Jun 10 (sow outdoors) | Jul 28–Aug 11 (sowing) |
| Turnip | – | May 6–27 (sow outdoors) | Jun 30–Jul 14 (sowing) |
| Parsnip | – | May 13–Jun 3 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 8–May 6 (sow outdoors) | Jun 16–30 (sowing) |
| Onion (bulbing) | Mar 11–25 | Apr 22–May 6 (transplant) | – |
| Green onion / scallion | – | Apr 22–May 20 (sow outdoors) | Jun 30–Jul 14 (sowing) |
| Leek | Mar 11–25 | May 6–20 (transplant) | – |
| Garlic | – | – | Jul 28–Aug 25 (sowing) |
| Shallot | – | Apr 22–May 6 (transplant) | Jul 28–Aug 25 (sowing) |
| Potato | – | May 6–20 (transplant) | – |
| Sweet potato | – | Jun 24–Jul 8 (transplant) | – |
| Sweet corn | – | Jun 10–24 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 10–24 (sow outdoors) | – |
| Bean, pole | – | Jun 10–24 (sow outdoors) | – |
| Lima bean | – | Jun 17–Jul 1 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 24–Jul 15 (sow outdoors) | – |
| Cucumber | May 6–13 | Jun 10–24 (transplant) Jun 10–24 (sow outdoors) | – |
| Summer squash / zucchini | May 6–13 | Jun 10–24 (transplant) Jun 10–24 (sow outdoors) | – |
| Winter squash | May 6–13 | Jun 10–24 (transplant) Jun 10–24 (sow outdoors) | – |
| Pumpkin | – | Jun 10–24 (sow outdoors) | – |
| Watermelon | May 6–13 | Jun 17–Jul 1 (transplant) Jun 17–Jul 1 (sow outdoors) | – |
| Cantaloupe / muskmelon | May 6–13 | Jun 17–Jul 1 (transplant) Jun 17–Jul 1 (sow outdoors) | – |
| Okra | Apr 22–May 6 | Jun 17–Jul 1 (transplant) Jun 17–Jul 1 (sow outdoors) | – |
| Celery | Mar 11–25 | Jun 10–17 (transplant) | – |
| Basil | Apr 22–May 6 | Jun 10–24 (transplant) Jun 10–24 (sow outdoors) | – |
| Cilantro | – | May 20–Jun 17 (sow outdoors) | Jul 14–28 (sowing) |
| Parsley | Mar 25–Apr 8 | May 20–Jun 3 (transplant) May 13–Jun 3 (sow outdoors) | – |
| Dill | – | Jun 3–17 (sow outdoors) | Jul 14–28 (sowing) |
| Sunflower | – | Jun 3–17 (sow outdoors) | – |
| Asparagus (crowns) | – | May 6–20 (transplant) | – |
| Rhubarb (crowns) | – | May 6–20 (transplant) | – |
| Strawberry (plants) | – | May 6–20 (transplant) | Jun 30–Jul 28 (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: St. Mary 1 SSW, MT (NOAA GHCN-Daily ID USW00004130), elevation 4,555 ft, 10.6 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| St Mary, MT | 11 mi | Jun 12 | Sep 5 |
| Del Bonita, MT | 29 mi | May 28 | Sep 16 |
| E Glacier, MT | 32 mi | Jun 8 | Sep 5 |
The average last-frost dates of these stations span 15 days, a rough guide to local variation. See data sources & methods.
Frost questions for 59411
When is the last frost in 59411?
The average (50% chance) last spring freeze of 32°F for ZIP 59411 is June 3. For a more cautious planting date, use June 23, when only 1 year in 10 still sees a later freeze.
When is the first frost in 59411?
The average first fall freeze is September 8. In 1 year in 10 it comes by August 22.
What hardiness zone is 59411?
ZIP 59411 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 59411 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
59434 East Glacier Park Village 59417 Starr School 59427 Santa Rita 59913 Coram 59928 Polebridge 59916 Snowslip 59926 Martin City 59919 Hungry Horse
Other ZIP codes in Glacier County
59417 59427 59434 All Glacier County frost dates · Montana frost dates
Never miss a frost: get The Dial
Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- Freeze alerts
- Soil-temp heads-up
- Weekly yard to-dos
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.