Frost dates for ZIP 83239 (Georgetown, ID)
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, Bern, ID (13 miles away).
- Average last spring frostJun 1750% chance of a 32°F freeze after this date
- Average first fall frostSep 350% chance of a 32°F freeze by this date
- Growing season (frost-free)77 daysmedian, 32°F threshold
- USDA hardiness zone5b-15 to -10°F avg. coldest night
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This week in your yard
As of Oct 17, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
50°F 50–55°F
24-hour average · latest 53°F, as of Oct 17, 10:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Cache Junction (59 mi).
4-inch depth
52°F 50–55°F
24-hour average · latest 54°F, as of Oct 17, 10:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Cache Junction (59 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 83239 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 52°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 31 |
| 50% (the "average" last frost) | Jun 17 |
| 10% (cautious: only 1 year in 10 freezes later) | Jul 4 |
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 18 |
| 50% (the "average" first frost) | Sep 3 |
| 90% (late: most years have frozen by now) | Sep 18 |
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 17 | Sep 3 |
| 28°F (hard freeze) | May 25 | Sep 16 |
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 83239
Dates count from your average last spring frost (Jun 17) and first fall frost (Sep 3). 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 22–May 6 | Jun 24–Jul 8 (transplant) | – |
| Pepper (sweet and hot) | Apr 8–22 | Jul 1–15 (transplant) | – |
| Eggplant | Apr 8–22 | Jul 1–15 (transplant) | – |
| Tomatillo | Apr 22–May 6 | Jun 24–Jul 8 (transplant) | – |
| Lettuce | Apr 22–May 6 | May 27–Jun 17 (transplant) May 20–Jul 1 (sow outdoors) | Jul 9–30 (transplant) |
| Spinach | – | May 6–27 (sow outdoors) | Jul 9–30 (sowing) |
| Kale | Apr 22–May 6 | May 20–Jun 3 (transplant) May 20–Jun 3 (sow outdoors) | Jun 11–Jul 9 (transplant) |
| Collards | Apr 22–May 6 | May 20–Jun 17 (transplant) May 20–Jun 17 (sow outdoors) | – |
| Broccoli | Apr 8–22 | May 20–Jun 3 (transplant) | – |
| Cabbage | Apr 8–22 | May 20–Jun 3 (transplant) | – |
| Cauliflower | Apr 8–22 | Jun 3–17 (transplant) | – |
| Brussels sprouts | Mar 25–Apr 8 | May 20–Jun 3 (transplant) | – |
| Kohlrabi | Apr 22–May 6 | May 20–Jun 3 (transplant) May 20–Jun 3 (sow outdoors) | Jun 25–Jul 9 (sowing) |
| Bok choy / Asian greens | – | May 20–Jun 3 (sow outdoors) | Jul 9–23 (sowing) |
| Arugula | – | May 20–Jun 17 (sow outdoors) | Jul 9–Aug 6 (sowing) |
| Mustard greens | – | May 20–Jun 10 (sow outdoors) | Jul 9–23 (sowing) |
| Swiss chard | May 6–20 | Jun 3–24 (transplant) Jun 3–Jul 1 (sow outdoors) | – |
| Beet | – | May 20–Jun 17 (sow outdoors) | Jun 25–Jul 9 (sowing) |
| Carrot | – | May 27–Jun 24 (sow outdoors) | – |
| Radish | – | May 13–Jun 24 (sow outdoors) | Jul 23–Aug 6 (sowing) |
| Turnip | – | May 20–Jun 10 (sow outdoors) | Jun 25–Jul 9 (sowing) |
| Parsnip | – | May 27–Jun 17 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 22–May 20 (sow outdoors) | Jun 11–25 (sowing) |
| Onion (bulbing) | Mar 25–Apr 8 | May 6–20 (transplant) | – |
| Green onion / scallion | – | May 6–Jun 3 (sow outdoors) | Jun 25–Jul 9 (sowing) |
| Leek | Mar 25–Apr 8 | May 20–Jun 3 (transplant) | – |
| Garlic | – | – | Jul 23–Aug 20 (sowing) |
| Shallot | – | May 6–20 (transplant) | Jul 23–Aug 20 (sowing) |
| Potato | – | May 20–Jun 3 (transplant) | – |
| Sweet potato | – | Jul 8–22 (transplant) | – |
| Sweet corn | – | Jun 24–Jul 8 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 24–Jul 8 (sow outdoors) | – |
| Bean, pole | – | Jun 24–Jul 8 (sow outdoors) | – |
| Lima bean | – | Jul 1–15 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jul 8–29 (sow outdoors) | – |
| Cucumber | May 20–27 | Jun 24–Jul 8 (transplant) Jun 24–Jul 8 (sow outdoors) | – |
| Summer squash / zucchini | May 20–27 | Jun 24–Jul 8 (transplant) Jun 24–Jul 8 (sow outdoors) | – |
| Winter squash | May 20–27 | Jun 24–Jul 8 (transplant) Jun 24–Jul 8 (sow outdoors) | – |
| Pumpkin | – | Jun 24–Jul 8 (sow outdoors) | – |
| Watermelon | May 20–27 | Jul 1–15 (transplant) Jul 1–15 (sow outdoors) | – |
| Cantaloupe / muskmelon | May 20–27 | Jul 1–15 (transplant) Jul 1–15 (sow outdoors) | – |
| Okra | May 6–20 | Jul 1–15 (transplant) Jul 1–15 (sow outdoors) | – |
| Celery | Mar 25–Apr 8 | Jun 24–Jul 1 (transplant) | – |
| Basil | May 6–20 | Jun 24–Jul 8 (transplant) Jun 24–Jul 8 (sow outdoors) | – |
| Cilantro | – | Jun 3–Jul 1 (sow outdoors) | Jul 9–23 (sowing) |
| Parsley | Apr 8–22 | Jun 3–17 (transplant) May 27–Jun 17 (sow outdoors) | – |
| Dill | – | Jun 17–Jul 1 (sow outdoors) | Jul 9–23 (sowing) |
| Sunflower | – | Jun 17–Jul 1 (sow outdoors) | – |
| Asparagus (crowns) | – | May 20–Jun 3 (transplant) | – |
| Rhubarb (crowns) | – | May 20–Jun 3 (transplant) | – |
| Strawberry (plants) | – | May 20–Jun 3 (transplant) | Jun 25–Jul 23 (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: Bern, ID (NOAA GHCN-Daily ID USC00100803), elevation 5,964 ft, 13.5 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Grace, ID | 19 mi | May 29 | Sep 17 |
| Afton, WY | 26 mi | Jun 20 | Sep 1 |
| Lifton Pumping STN, ID | 28 mi | May 19 | Sep 21 |
The average last-frost dates of these stations span 32 days, a rough guide to local variation. See data sources & methods.
Frost questions for 83239
When is the last frost in 83239?
The average (50% chance) last spring freeze of 32°F for ZIP 83239 is June 17. For a more cautious planting date, use July 4, when only 1 year in 10 still sees a later freeze.
When is the first frost in 83239?
The average first fall freeze is September 3. In 1 year in 10 it comes by August 18.
What hardiness zone is 83239?
ZIP 83239 is in USDA zone 5b (-15 to -10°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 83239 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
83220 83254 Bennington 83276 Soda Springs 83238 83283 83119 83241 Grace 83261 Paris
Other ZIP codes in Bear Lake County
83220 83223 83233 83238 83254 83261 83272 83287 All Bear Lake County frost dates · Idaho frost dates
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