Fall in zone 6bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 15720 (Indiana County, PA)
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, Indiana 3 SE, PA (5 miles away).
- Average last spring frostMay 850% chance of a 32°F freeze after this date
- Average first fall frostOct 1350% chance of a 32°F freeze by this date
- Growing season (frost-free)157 daysmedian, 32°F threshold
- USDA hardiness zone6b-5 to 0°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
55°F 55°F or warmer
24-hour average · latest 51°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Rock Springs Pa (61 mi).
4-inch depth
58°F 55°F or warmer
24-hour average · latest 54°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Rock Springs Pa (61 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 15720 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 58°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent (annual bluegrass, winter weeds): window open as soil cools through the 70s and 60s.
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) | Apr 23 |
| 50% (the "average" last frost) | May 8 |
| 10% (cautious: only 1 year in 10 freezes later) | May 24 |
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) | Oct 1 |
| 50% (the "average" first frost) | Oct 13 |
| 90% (late: most years have frozen by now) | Oct 27 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 20 | Oct 3 |
| 32°F (freeze) | May 8 | Oct 13 |
| 28°F (hard freeze) | Apr 27 | Oct 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 15720
Dates count from your average last spring frost (May 8) and first fall frost (Oct 13). 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 | Mar 13–27 | May 15–29 (transplant) | – |
| Pepper (sweet and hot) | Feb 27–Mar 13 | May 22–Jun 5 (transplant) | – |
| Eggplant | Feb 27–Mar 13 | May 22–Jun 5 (transplant) | – |
| Tomatillo | Mar 13–27 | May 15–29 (transplant) | – |
| Lettuce | Mar 13–27 | Apr 17–May 8 (transplant) Apr 10–May 22 (sow outdoors) | Aug 18–Sep 8 (transplant) Aug 4–Sep 1 (sowing) |
| Spinach | – | Mar 27–Apr 17 (sow outdoors) | Aug 18–Sep 8 (sowing) |
| Kale | Mar 13–27 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | Jul 21–Aug 18 (transplant) Jul 7–Aug 4 (sowing) |
| Collards | Mar 13–27 | Apr 10–May 8 (transplant) Apr 10–May 8 (sow outdoors) | Jul 21–Aug 18 (transplant) Jul 7–Aug 4 (sowing) |
| Broccoli | Feb 27–Mar 13 | Apr 10–24 (transplant) | Jul 7–Aug 4 (transplant) |
| Cabbage | Feb 27–Mar 13 | Apr 10–24 (transplant) | Jul 7–Aug 4 (transplant) |
| Cauliflower | Feb 27–Mar 13 | Apr 24–May 8 (transplant) | Jul 7–Aug 4 (transplant) |
| Brussels sprouts | Feb 13–27 | Apr 10–24 (transplant) | Jun 23–Jul 14 (transplant) |
| Kohlrabi | Mar 13–27 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | Aug 4–18 (sowing) |
| Bok choy / Asian greens | – | Apr 10–24 (sow outdoors) | Aug 18–Sep 1 (sowing) |
| Arugula | – | Apr 10–May 8 (sow outdoors) | Aug 18–Sep 15 (sowing) |
| Mustard greens | – | Apr 10–May 1 (sow outdoors) | Aug 18–Sep 1 (sowing) |
| Swiss chard | Mar 27–Apr 10 | Apr 24–May 15 (transplant) Apr 24–May 22 (sow outdoors) | Aug 4–18 (sowing) |
| Beet | – | Apr 10–May 8 (sow outdoors) | Aug 4–18 (sowing) |
| Carrot | – | Apr 17–May 15 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Radish | – | Apr 3–May 15 (sow outdoors) | Sep 1–15 (sowing) |
| Turnip | – | Apr 10–May 1 (sow outdoors) | Aug 4–18 (sowing) |
| Parsnip | – | Apr 17–May 8 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Mar 13–Apr 10 (sow outdoors) | Jul 21–Aug 4 (sowing) |
| Onion (bulbing) | Feb 13–27 | Mar 27–Apr 10 (transplant) | – |
| Green onion / scallion | – | Mar 27–Apr 24 (sow outdoors) | Aug 4–18 (sowing) |
| Leek | Feb 13–27 | Apr 10–24 (transplant) | – |
| Garlic | – | – | Sep 1–29 (sowing) |
| Shallot | – | Mar 27–Apr 10 (transplant) | Sep 1–29 (sowing) |
| Potato | – | Apr 10–24 (transplant) | Jun 23–Jul 7 (transplant) |
| Sweet potato | – | May 29–Jun 12 (transplant) | – |
| Sweet corn | – | May 15–29 (sow outdoors) | – |
| Bean, bush (snap) | – | May 15–29 (sow outdoors) | – |
| Bean, pole | – | May 15–29 (sow outdoors) | – |
| Lima bean | – | May 22–Jun 5 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 29–Jun 19 (sow outdoors) | – |
| Cucumber | Apr 10–17 | May 15–29 (transplant) May 15–29 (sow outdoors) | – |
| Summer squash / zucchini | Apr 10–17 | May 15–29 (transplant) May 15–29 (sow outdoors) | – |
| Winter squash | Apr 10–17 | May 15–29 (transplant) May 15–29 (sow outdoors) | – |
| Pumpkin | – | May 15–29 (sow outdoors) | – |
| Watermelon | Apr 10–17 | May 22–Jun 5 (transplant) May 22–Jun 5 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 10–17 | May 22–Jun 5 (transplant) May 22–Jun 5 (sow outdoors) | – |
| Okra | Mar 27–Apr 10 | May 22–Jun 5 (transplant) May 22–Jun 5 (sow outdoors) | – |
| Celery | Feb 13–27 | May 15–22 (transplant) | – |
| Basil | Mar 27–Apr 10 | May 15–29 (transplant) May 15–29 (sow outdoors) | – |
| Cilantro | – | Apr 24–May 22 (sow outdoors) | Aug 18–Sep 1 (sowing) |
| Parsley | Feb 27–Mar 13 | Apr 24–May 8 (transplant) Apr 17–May 8 (sow outdoors) | – |
| Dill | – | May 8–22 (sow outdoors) | Aug 18–Sep 1 (sowing) |
| Sunflower | – | May 8–22 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 10–24 (transplant) | – |
| Rhubarb (crowns) | – | Apr 10–24 (transplant) | – |
| Strawberry (plants) | – | Apr 10–24 (transplant) | Aug 4–Sep 1 (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: Indiana 3 SE, PA (NOAA GHCN-Daily ID USC00364214), elevation 1,102 ft, 4.9 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Ebensburg Sewage Plt, PA | 18 mi | May 17 | Oct 2 |
| Johnstown Cambria Co AP, PA | 20 mi | Apr 29 | Oct 21 |
| Loyalhanna Lake, PA | 21 mi | May 2 | Oct 14 |
The average last-frost dates of these stations span 19 days, a rough guide to local variation. See data sources & methods.
Frost questions for 15720
When is the last frost in 15720?
The average (50% chance) last spring freeze of 32°F for ZIP 15720 is May 8. For a more cautious planting date, use May 24, when only 1 year in 10 still sees a later freeze.
When is the first frost in 15720?
The average first fall freeze is October 13. In 1 year in 10 it comes by October 1.
What hardiness zone is 15720?
ZIP 15720 is in USDA zone 6b (-5 to 0°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 15720 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
15748 Homer City 15754 Lucerne Mines 15929 15920 Armagh 15765 15731 Coral 15750 Black Lick 15705 Indiana
Other ZIP codes in Indiana County
15681 15701 15705 15710 15712 15713 15716 15717 15723 15724 15725 15727 15728 15729 15731 15732 15734 15739 15741 15742 15745 15746 15747 15748 All Indiana County frost dates · Pennsylvania 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.