Fall in zone 7aPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 16647 (Huntingdon 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, Raystown Lake 2, PA (2 miles away).
- Average last spring frostApr 1950% chance of a 32°F freeze after this date
- Average first fall frostOct 2850% chance of a 32°F freeze by this date
- Growing season (frost-free)191 daysmedian, 32°F threshold
- USDA hardiness zone7a0 to 5°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 (25 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 (25 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 16647 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: Transition zone. Timing only; always follow the product label.
- Bermudagrass (warm-season): Spring: Several weeks after the lawn is fully green (April–May) (about Jun 4 here, using green-up about 3–4 weeks after your average last frost); Summer: Every 4–6 weeks through mid-August (heaviest feeder of the group); Late: Light, low-nitrogen/high-potassium feeding about 4 weeks before first frost, or skip. Avoid: Heavy late-fall nitrogen (linked to spring dead spot).
- Tall fescue (cool-season): Early fall: September (main feeding); Late fall: November, while still green; Late winter: Optional light feeding February–March. Avoid: Feeding after mid-spring and through summer in the transition zone (stress and brown patch).
Plant now
No vegetable planting windows are open this week.
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Oct 28: skip heavy pruning in the 6–8 weeks before it, because new growth may not harden off in time.
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 5 |
| 50% (the "average" last frost) | Apr 19 |
| 10% (cautious: only 1 year in 10 freezes later) | May 7 |
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 12 |
| 50% (the "average" first frost) | Oct 28 |
| 90% (late: most years have frozen by now) | Nov 10 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 30 | Oct 15 |
| 32°F (freeze) | Apr 19 | Oct 28 |
| 28°F (hard freeze) | Apr 6 | Nov 9 |
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 16647
Dates count from your average last spring frost (Apr 19) and first fall frost (Oct 28). 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 | Feb 22–Mar 8 | Apr 26–May 10 (transplant) | – |
| Pepper (sweet and hot) | Feb 8–22 | May 3–17 (transplant) | – |
| Eggplant | Feb 8–22 | May 3–17 (transplant) | – |
| Tomatillo | Feb 22–Mar 8 | Apr 26–May 10 (transplant) | – |
| Lettuce | Feb 22–Mar 8 | Mar 29–Apr 19 (transplant) Mar 22–May 3 (sow outdoors) | Sep 2–23 (transplant) Aug 19–Sep 16 (sowing) |
| Spinach | – | Mar 8–29 (sow outdoors) | Sep 2–23 (sowing) |
| Kale | Feb 22–Mar 8 | Mar 22–Apr 5 (transplant) Mar 22–Apr 5 (sow outdoors) | Aug 5–Sep 2 (transplant) Jul 22–Aug 19 (sowing) |
| Collards | Feb 22–Mar 8 | Mar 22–Apr 19 (transplant) Mar 22–Apr 19 (sow outdoors) | Aug 5–Sep 2 (transplant) Jul 22–Aug 19 (sowing) |
| Broccoli | Feb 8–22 | Mar 22–Apr 5 (transplant) | Jul 22–Aug 19 (transplant) |
| Cabbage | Feb 8–22 | Mar 22–Apr 5 (transplant) | Jul 22–Aug 19 (transplant) |
| Cauliflower | Feb 8–22 | Apr 5–19 (transplant) | Jul 22–Aug 19 (transplant) |
| Brussels sprouts | Jan 25–Feb 8 | Mar 22–Apr 5 (transplant) | Jul 8–29 (transplant) |
| Kohlrabi | Feb 22–Mar 8 | Mar 22–Apr 5 (transplant) Mar 22–Apr 5 (sow outdoors) | Aug 19–Sep 2 (sowing) |
| Bok choy / Asian greens | – | Mar 22–Apr 5 (sow outdoors) | Sep 2–16 (sowing) |
| Arugula | – | Mar 22–Apr 19 (sow outdoors) | Sep 2–30 (sowing) |
| Mustard greens | – | Mar 22–Apr 12 (sow outdoors) | Sep 2–16 (sowing) |
| Swiss chard | Mar 8–22 | Apr 5–26 (transplant) Apr 5–May 3 (sow outdoors) | Aug 19–Sep 2 (sowing) |
| Beet | – | Mar 22–Apr 19 (sow outdoors) | Aug 19–Sep 2 (sowing) |
| Carrot | – | Mar 29–Apr 26 (sow outdoors) | Aug 5–19 (sowing) |
| Radish | – | Mar 15–Apr 26 (sow outdoors) | Sep 16–30 (sowing) |
| Turnip | – | Mar 22–Apr 12 (sow outdoors) | Aug 19–Sep 2 (sowing) |
| Parsnip | – | Mar 29–Apr 19 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 22–Mar 22 (sow outdoors) | Aug 5–19 (sowing) |
| Onion (bulbing) | Jan 25–Feb 8 | Mar 8–22 (transplant) | – |
| Green onion / scallion | – | Mar 8–Apr 5 (sow outdoors) | Aug 19–Sep 2 (sowing) |
| Leek | Jan 25–Feb 8 | Mar 22–Apr 5 (transplant) | – |
| Garlic | – | – | Sep 16–Oct 14 (sowing) |
| Shallot | – | Mar 8–22 (transplant) | Sep 16–Oct 14 (sowing) |
| Potato | – | Mar 22–Apr 5 (transplant) | Jul 8–22 (transplant) |
| Sweet potato | – | May 10–24 (transplant) | – |
| Sweet corn | – | Apr 26–May 10 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 26–May 10 (sow outdoors) | – |
| Bean, pole | – | Apr 26–May 10 (sow outdoors) | – |
| Lima bean | – | May 3–17 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 10–31 (sow outdoors) | – |
| Cucumber | Mar 22–29 | Apr 26–May 10 (transplant) Apr 26–May 10 (sow outdoors) | – |
| Summer squash / zucchini | Mar 22–29 | Apr 26–May 10 (transplant) Apr 26–May 10 (sow outdoors) | – |
| Winter squash | Mar 22–29 | Apr 26–May 10 (transplant) Apr 26–May 10 (sow outdoors) | – |
| Pumpkin | – | Apr 26–May 10 (sow outdoors) | – |
| Watermelon | Mar 22–29 | May 3–17 (transplant) May 3–17 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 22–29 | May 3–17 (transplant) May 3–17 (sow outdoors) | – |
| Okra | Mar 8–22 | May 3–17 (transplant) May 3–17 (sow outdoors) | – |
| Celery | Jan 25–Feb 8 | Apr 26–May 3 (transplant) | – |
| Basil | Mar 8–22 | Apr 26–May 10 (transplant) Apr 26–May 10 (sow outdoors) | – |
| Cilantro | – | Apr 5–May 3 (sow outdoors) | Sep 2–16 (sowing) |
| Parsley | Feb 8–22 | Apr 5–19 (transplant) Mar 29–Apr 19 (sow outdoors) | – |
| Dill | – | Apr 19–May 3 (sow outdoors) | Sep 2–16 (sowing) |
| Sunflower | – | Apr 19–May 3 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 22–Apr 5 (transplant) | – |
| Rhubarb (crowns) | – | Mar 22–Apr 5 (transplant) | – |
| Strawberry (plants) | – | Mar 22–Apr 5 (transplant) | Aug 19–Sep 16 (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: Raystown Lake 2, PA (NOAA GHCN-Daily ID USC00367312), elevation 1,000 ft, 2.0 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Raystown Hq, PA | 2 mi | Apr 19 | Oct 29 |
| Altoona Blair Co AP, PA | 12 mi | Apr 23 | Oct 21 |
| Altoona 7 SW, PA | 16 mi | Apr 25 | Oct 20 |
The average last-frost dates of these stations span 6 days, a rough guide to local variation. See data sources & methods.
Frost questions for 16647
When is the last frost in 16647?
The average (50% chance) last spring freeze of 32°F for ZIP 16647 is April 19. For a more cautious planting date, use May 7, when only 1 year in 10 still sees a later freeze.
When is the first frost in 16647?
The average first fall freeze is October 28. In 1 year in 10 it comes by October 12.
What hardiness zone is 16647?
ZIP 16647 is in USDA zone 7a (0 to 5°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 16647 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
16657 Marklesburg 16622 16638 16685 16623 Cassville 16693 Yellow Springs 16621 Broad Top City 16654
Other ZIP codes in Huntingdon County
16611 16621 16622 16623 16634 16638 16652 16654 16657 16669 16674 16683 16685 16694 17002 17052 17060 17066 17213 17215 17239 17243 17249 17253 All Huntingdon 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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- 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.