Mount Wolf, PA frost dates
Last spring frostApr 9median date
First fall frostNov 2median date
Growing season207 daysfrost-free
Hardiness zone7aZone 7a
How Mount Wolf compares
- In 8 years out of 10, the last spring frost in Mount Wolf falls between March 28 and April 25, a 28-day window. The first fall frost falls between October 18 and November 15.
- The median last frost is 18 days earlier than the Pennsylvania median of Apr 27.
- Its 207-day growing season is longer than 94% of the 1,787 Pennsylvania places with a regular frost season (state median 175 days).
- The last frost is 7 days earlier than the zone 7a median of Apr 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7a chart.
- The weather station records an average of 101 nights a year at or below 32°F.
- Compared with Harrisburg, PA, 27 km away, the last frost here is 6 days earlier than there and the growing season is 16 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 28 |
| 50% (median) | April 9 |
| 10% (safe for tender plants) | April 25 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 18 |
| 50% (median) | November 2 |
| 90% (late) | November 15 |
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 Mount Wolf, PA
Mount Wolf, PA frost dates — last frost Apr 9, first frost Nov 2, zone 7a. whenisthelastfrost.com
Crop
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Start indoors: Jan 15 to Jan 29Transplant outside: Mar 12 to Mar 26
Start indoors: Jan 29 to Feb 12Transplant outside: Apr 23 to May 7
Start indoors: Jan 29 to Feb 12Transplant outside: Apr 23 to May 7
Start indoors: Feb 12 to Feb 26Transplant outside: Apr 16 to Apr 30
Start indoors: Feb 12 to Feb 26Transplant outside: Mar 19 to Apr 2Sow outdoors: Mar 12 to Apr 16Plant for fall: Sep 7 to Oct 5
Start indoors: Feb 12 to Feb 26Transplant outside: Mar 12 to Mar 26Sow outdoors: Mar 12 to Mar 26Plant for fall: Aug 24 to Sep 14
Start indoors: Feb 12 to Feb 26Transplant outside: Mar 26 to Apr 9Plant for fall: Jul 27 to Aug 17
Start indoors: Feb 12 to Feb 26Transplant outside: Mar 19 to Apr 2Plant for fall: Jul 27 to Aug 17
Start indoors: Feb 12 to Feb 26Transplant outside: Mar 26 to Apr 9Plant for fall: Jul 27 to Aug 17
Start indoors: Feb 26 to Mar 12Transplant outside: Apr 30 to May 14Sow outdoors: Apr 30 to May 14
Start indoors: Feb 26 to Mar 12Transplant outside: Apr 16 to Apr 30
Sow outdoors: Feb 26 to Mar 19Plant for fall: Aug 10 to Aug 31
Sow outdoors: Feb 26 to Mar 19Plant for fall: Sep 7 to Sep 28
Sow outdoors: Mar 5 to Apr 16Plant for fall: Sep 21 to Oct 12
Start indoors: Mar 12 to Mar 19Transplant outside: Apr 23 to Apr 30Sow outdoors: Apr 16 to Apr 30Plant for fall: Aug 17 to Aug 31
Start indoors: Mar 12 to Mar 19Sow outdoors: Apr 16 to Apr 30Plant for fall: Aug 24 to Sep 7
Start indoors: Mar 12 to Mar 19Sow outdoors: Apr 16 to Apr 30
Start indoors: Mar 12 to Mar 19Transplant outside: Apr 23 to May 7
Sow outdoors: Mar 19 to Apr 16Plant for fall: Aug 10 to Aug 24
Sow outdoors: Mar 19 to Apr 16Plant for fall: Aug 24 to Sep 7
Sow outdoors: Mar 19 to Apr 9
Sow outdoors: Mar 26 to Apr 23Plant for fall: Aug 24 to Sep 7
Sow outdoors: Mar 26 to Apr 16Plant for fall: Sep 7 to Sep 28
Sow outdoors: Apr 16 to May 7Plant for fall: Aug 17 to Aug 31
Sow outdoors: Apr 16 to Apr 30
Transplant outside: Apr 23 to May 14
Plant for fall: Oct 19 to Nov 23
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Mount Wolf, PA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 15 – Jan 29 | Mar 12 – Mar 26 | — | — |
| Peppers | Jan 29 – Feb 12 | Apr 23 – May 7 | — | — |
| Eggplant | Jan 29 – Feb 12 | Apr 23 – May 7 | — | — |
| Tomatoes | Feb 12 – Feb 26 | Apr 16 – Apr 30 | — | — |
| Lettuce | Feb 12 – Feb 26 | Mar 19 – Apr 2 | Mar 12 – Apr 16 | Sep 7 – Oct 5 |
| Kale | Feb 12 – Feb 26 | Mar 12 – Mar 26 | Mar 12 – Mar 26 | Aug 24 – Sep 14 |
| Broccoli | Feb 12 – Feb 26 | Mar 26 – Apr 9 | — | Jul 27 – Aug 17 |
| Cabbage | Feb 12 – Feb 26 | Mar 19 – Apr 2 | — | Jul 27 – Aug 17 |
| Cauliflower | Feb 12 – Feb 26 | Mar 26 – Apr 9 | — | Jul 27 – Aug 17 |
| Okra | Feb 26 – Mar 12 | Apr 30 – May 14 | Apr 30 – May 14 | — |
| Basil | Feb 26 – Mar 12 | Apr 16 – Apr 30 | — | — |
| Peas | — | — | Feb 26 – Mar 19 | Aug 10 – Aug 31 |
| Spinach | — | — | Feb 26 – Mar 19 | Sep 7 – Sep 28 |
| Radishes | — | — | Mar 5 – Apr 16 | Sep 21 – Oct 12 |
| Cucumbers | Mar 12 – Mar 19 | Apr 23 – Apr 30 | Apr 16 – Apr 30 | Aug 17 – Aug 31 |
| Zucchini & Summer Squash | Mar 12 – Mar 19 | — | Apr 16 – Apr 30 | Aug 24 – Sep 7 |
| Winter Squash & Pumpkins | Mar 12 – Mar 19 | — | Apr 16 – Apr 30 | — |
| Melons & Watermelon | Mar 12 – Mar 19 | Apr 23 – May 7 | — | — |
| Carrots | — | — | Mar 19 – Apr 16 | Aug 10 – Aug 24 |
| Beets | — | — | Mar 19 – Apr 16 | Aug 24 – Sep 7 |
| Potatoes | — | — | Mar 19 – Apr 9 | — |
| Swiss Chard | — | — | Mar 26 – Apr 23 | Aug 24 – Sep 7 |
| Cilantro | — | — | Mar 26 – Apr 16 | Sep 7 – Sep 28 |
| Green Beans | — | — | Apr 16 – May 7 | Aug 17 – Aug 31 |
| Sweet Corn | — | — | Apr 16 – Apr 30 | — |
| Sweet Potatoes | — | Apr 23 – May 14 | — | — |
| Garlic | — | — | — | Oct 19 – Nov 23 |
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 Middletown Harrisburg Intl Ap, PA weather station, 15 km away (elevation 312 ft (95 m)).
Frost dates near Mount Wolf
- Manchester Apr 9 · Nov 2
- Bainbridge Apr 9 · Nov 2
- Emigsville Apr 26 · Oct 19
- York Haven Apr 9 · Nov 2
- Maytown Apr 30 · Oct 10
- Rossville Apr 26 · Oct 19
- Marietta Apr 30 · Oct 10
- York Apr 26 · Oct 19
- Elizabethtown Apr 9 · Nov 2
- Rheems Apr 30 · Oct 10
Frequently asked questions
When is the last frost in Mount Wolf, PA?
The median last spring frost in Mount Wolf, PA is April 9. There is still about a 10% chance of frost after April 25, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Mount Wolf, PA?
The median first fall frost is November 2, with about a 10% chance of frost before October 18.
How long is the growing season in Mount Wolf, PA?
About 207 days between the median last spring frost and first fall frost.
What planting zone is Mount Wolf, PA?
Mount Wolf, PA is in USDA hardiness zone 7a.