Frost dates for 16172 — New Wilmington, PA
Last spring frostApr 30median date
First fall frostOct 23median date
Growing season176 daysfrost-free
Hardiness zone6aZone 6a
How New Wilmington compares
- In 8 years out of 10, the last spring frost in New Wilmington falls between April 17 and May 19, a 32-day window. The first fall frost falls between October 6 and November 4.
- The median last frost is 3 days later than the Pennsylvania median of Apr 27.
- Its 176-day growing season is longer than 51% of the 1,787 Pennsylvania places with a regular frost season (state median 175 days).
- The last frost is typical for zone 6a, where the median is Apr 29.
- The weather station records an average of 134 nights a year at or below 32°F.
- Compared with Youngstown, OH, 29 km away, the last frost here is 8 days earlier than there and the growing season is 19 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 17 |
| 50% (median) | April 30 |
| 10% (safe for tender plants) | May 19 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 6 |
| 50% (median) | October 23 |
| 90% (late) | November 4 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for New Wilmington, PA
Frost dates for 16172 — New Wilmington, PA — last frost Apr 30, first frost Oct 23, zone 6a. whenisthelastfrost.com
Crop
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Start indoors: Feb 5 to Feb 19Transplant outside: Apr 2 to Apr 16
Start indoors: Feb 19 to Mar 5Transplant outside: May 14 to May 28
Start indoors: Feb 19 to Mar 5Transplant outside: May 14 to May 28
Start indoors: Mar 5 to Mar 19Transplant outside: May 7 to May 21
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 9 to Apr 23Sow outdoors: Apr 2 to May 7Plant for fall: Aug 28 to Sep 25
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 2 to Apr 16Sow outdoors: Apr 2 to Apr 16Plant for fall: Aug 14 to Sep 4
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 16 to Apr 30Plant for fall: Jul 17 to Aug 7
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 9 to Apr 23Plant for fall: Jul 17 to Aug 7
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 16 to Apr 30Plant for fall: Jul 17 to Aug 7
Start indoors: Mar 19 to Apr 2Transplant outside: May 21 to Jun 4Sow outdoors: May 21 to Jun 4
Start indoors: Mar 19 to Apr 2Transplant outside: May 7 to May 21
Sow outdoors: Mar 19 to Apr 9Plant for fall: Jul 31 to Aug 21
Sow outdoors: Mar 19 to Apr 9Plant for fall: Aug 28 to Sep 18
Sow outdoors: Mar 26 to May 7Plant for fall: Sep 11 to Oct 2
Start indoors: Apr 2 to Apr 9Transplant outside: May 14 to May 21Sow outdoors: May 7 to May 21Plant for fall: Aug 7 to Aug 21
Start indoors: Apr 2 to Apr 9Sow outdoors: May 7 to May 21Plant for fall: Aug 14 to Aug 28
Start indoors: Apr 2 to Apr 9Sow outdoors: May 7 to May 21
Start indoors: Apr 2 to Apr 9Transplant outside: May 14 to May 28
Sow outdoors: Apr 9 to May 7Plant for fall: Jul 31 to Aug 14
Sow outdoors: Apr 9 to May 7Plant for fall: Aug 14 to Aug 28
Sow outdoors: Apr 9 to Apr 30
Sow outdoors: Apr 16 to May 14Plant for fall: Aug 14 to Aug 28
Sow outdoors: Apr 16 to May 7Plant for fall: Aug 28 to Sep 18
Sow outdoors: May 7 to May 28Plant for fall: Aug 7 to Aug 21
Sow outdoors: May 7 to May 21
Transplant outside: May 14 to Jun 4
Plant for fall: Oct 9 to Nov 13
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in New Wilmington, PA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 5 – Feb 19 | Apr 2 – Apr 16 | — | — |
| Peppers | Feb 19 – Mar 5 | May 14 – May 28 | — | — |
| Eggplant | Feb 19 – Mar 5 | May 14 – May 28 | — | — |
| Tomatoes | Mar 5 – Mar 19 | May 7 – May 21 | — | — |
| Lettuce | Mar 5 – Mar 19 | Apr 9 – Apr 23 | Apr 2 – May 7 | Aug 28 – Sep 25 |
| Kale | Mar 5 – Mar 19 | Apr 2 – Apr 16 | Apr 2 – Apr 16 | Aug 14 – Sep 4 |
| Broccoli | Mar 5 – Mar 19 | Apr 16 – Apr 30 | — | Jul 17 – Aug 7 |
| Cabbage | Mar 5 – Mar 19 | Apr 9 – Apr 23 | — | Jul 17 – Aug 7 |
| Cauliflower | Mar 5 – Mar 19 | Apr 16 – Apr 30 | — | Jul 17 – Aug 7 |
| Okra | Mar 19 – Apr 2 | May 21 – Jun 4 | May 21 – Jun 4 | — |
| Basil | Mar 19 – Apr 2 | May 7 – May 21 | — | — |
| Peas | — | — | Mar 19 – Apr 9 | Jul 31 – Aug 21 |
| Spinach | — | — | Mar 19 – Apr 9 | Aug 28 – Sep 18 |
| Radishes | — | — | Mar 26 – May 7 | Sep 11 – Oct 2 |
| Cucumbers | Apr 2 – Apr 9 | May 14 – May 21 | May 7 – May 21 | Aug 7 – Aug 21 |
| Zucchini & Summer Squash | Apr 2 – Apr 9 | — | May 7 – May 21 | Aug 14 – Aug 28 |
| Winter Squash & Pumpkins | Apr 2 – Apr 9 | — | May 7 – May 21 | — |
| Melons & Watermelon | Apr 2 – Apr 9 | May 14 – May 28 | — | — |
| Carrots | — | — | Apr 9 – May 7 | Jul 31 – Aug 14 |
| Beets | — | — | Apr 9 – May 7 | Aug 14 – Aug 28 |
| Potatoes | — | — | Apr 9 – Apr 30 | — |
| Swiss Chard | — | — | Apr 16 – May 14 | Aug 14 – Aug 28 |
| Cilantro | — | — | Apr 16 – May 7 | Aug 28 – Sep 18 |
| Green Beans | — | — | May 7 – May 28 | Aug 7 – Aug 21 |
| Sweet Corn | — | — | May 7 – May 21 | — |
| Sweet Potatoes | — | May 14 – Jun 4 | — | — |
| Garlic | — | — | — | Oct 9 – Nov 13 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the New Castle 1 N, PA weather station, 12 km away (elevation 827 ft (252 m)).
ZIP codes in New Wilmington: 16142 16172
Frost dates near New Wilmington
- Volant Apr 30 · Oct 23
- West Middlesex Apr 30 · Oct 23
- Pulaski Apr 30 · Oct 23
- New Castle Apr 30 · Oct 23
- New Bedford Apr 30 · Oct 23
- Edinburg Apr 30 · Oct 23
- Mercer May 15 · Oct 3
- Villa Maria Apr 30 · Oct 23
Frequently asked questions
When is the last frost in New Wilmington, PA?
The median last spring frost in New Wilmington, PA is April 30. There is still about a 10% chance of frost after May 19, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in New Wilmington, PA?
The median first fall frost is October 23, with about a 10% chance of frost before October 6.
How long is the growing season in New Wilmington, PA?
About 176 days between the median last spring frost and first fall frost.
What planting zone is New Wilmington, PA?
New Wilmington, PA is in USDA hardiness zone 6a.