When to plant Summer squash in Pennsylvania, United States
Summer squash can be planted after May 19, when air temperature is consistently in a range between 50°F and 95°F and soil temperature is above 45°F.
Growing Summer squash in Pennsylvania
Days suitable for growing Summer squash in Pennsylvania
Pennsylvania has on average 139 days, suitable for growing Summer squash. Summer squash needs on average between 60 and 90 days to mature and produce harvest. With 139 days suitable for growing, you can expect good harvest without too much effort if all planting activities are done in timely manner.
Summer squash seeds can be planted between May 19 and August 05. Planting before May 19 without any additional protection is not advised because cold streaks can damage or kill off young plant. When planting after August 05, Summer squash will not have enough time to mature and produce harvest.
Growing season extention
In order to maximize chances for a good harvest of Summer squash in Pennsylvania, some extra steps can be taken to extend growing season.
Start seeds indoors
When starting seeds indoors, it is possible to guarantee best possible conditions for young seedlings. Consistent temperature range, adequate watering and ample light (natural, supplemented with artifitial grow lights) will ensure you have strong and healthy seedlings just in time for transplanting into soil.
It takes 21 days on average for Summer squash to sprout, and grow big enough to be ready for transplanting.
May 19 is on average first day in Pennsylvania that has required temperatures for young Summer squash seedlings to grow, without worrying about cold damage.
Seeds can be started indoors beween April 28 and July 06, this way they will be ready just in time for transplanting on May 19.
Seedlings started after July 06 might not have enough time to mature and produce harvest.
Use a cold frame
When using a cold frame in a beggining of growing season You can protect young plants from possible temperature drops, this way growing season can start up to 2 weeks earlier.
Use an additional shading
On days, when air temperatures are expected to raise above 95°F, which is in top of tolerable range for Summer squash, consider using additional shading to prevent heat shock.
| Total frost free days | 175 |
| Last frost expected date | May 10 |
| First frost expected date | November 01 |
| Dates with ideal conditions | |
| Dates with suitable conditions | May 04 May 16 to May 17 (2 days) May 19 to October 04 (139 days) October 06 to October 08 (3 days) October 11 to October 13 (3 days) |
| Total days ideal for growing Summer squash in Pennsylvania | 0 |
| Total days suitable for growing Summer squash in Pennsylvania | 148 |
| Days needed for Summer squash to mature and produce harvest | 60 - 90 |
| Seed can be planted directly into soil | yes |
Notable temperature facts for growing Summer squash in Pennsylvania
Table with days suitable to grow vegetables in Pennsylvania
Tolerable temperature range for Summer squash: 50°F to 95°F
| Week | Average temperature | Possible min and max temperature | Suitable for Summer squash | |
|---|---|---|---|---|
| 1 | January 01 - January 03 | 35°F to 45°F | 23°F to 56°F | |
| 2 | January 04 - January 10 | 29°F to 40°F | 14°F to 60°F | |
| 3 | January 11 - January 17 | 27°F to 40°F | 11°F to 62°F | |
| 4 | January 18 - January 24 | 21°F to 35°F | -5°F to 48°F | |
| 5 | January 25 - January 31 | 20°F to 33°F | -6°F to 48°F | |
| 6 | February 01 - February 07 | 24°F to 40°F | 1°F to 56°F | |
| 7 | February 08 - February 14 | 25°F to 39°F | 3°F to 57°F | |
| 8 | February 15 - February 21 | 25°F to 42°F | 6°F to 64°F | |
| 9 | February 22 - February 28 | 29°F to 44°F | 20°F to 63°F | |
| 10 | March 01 - March 07 | 27°F to 44°F | 1°F to 67°F | |
| 11 | March 08 - March 14 | 30°F to 49°F | 13°F to 66°F | |
| 12 | March 15 - March 21 | 34°F to 52°F | 23°F to 70°F | |
| 13 | March 22 - March 28 | 36°F to 53°F | 22°F to 68°F | |
| 14 | March 29 - April 04 | 36°F to 55°F | 19°F to 71°F | |
| 15 | April 05 - April 11 | 42°F to 61°F | 31°F to 76°F | |
| 16 | April 12 - April 18 | 44°F to 62°F | 29°F to 82°F | |
| 17 | April 19 - April 25 | 42°F to 61°F | 30°F to 78°F | |
| 18 | April 26 - May 02 | 44°F to 61°F | 32°F to 79°F | |
| 19 | May 03 - May 09 | 47°F to 63°F | 35°F to 76°F | |
| 20 | May 10 - May 16 | 46°F to 66°F | 29°F to 80°F | |
| 21 | May 17 - May 23 | 53°F to 73°F | 39°F to 85°F | TRUE |
| 22 | May 24 - May 30 | 57°F to 74°F | 45°F to 84°F | TRUE |
| 23 | May 31 - June 06 | 57°F to 76°F | 44°F to 90°F | TRUE |
| 24 | June 07 - June 13 | 59°F to 76°F | 50°F to 87°F | TRUE |
| 25 | June 14 - June 20 | 58°F to 75°F | 50°F to 85°F | TRUE |
| 26 | June 21 - June 27 | 62°F to 79°F | 49°F to 86°F | TRUE |
| 27 | June 28 - July 04 | 64°F to 82°F | 56°F to 91°F | TRUE |
| 28 | July 05 - July 11 | 67°F to 84°F | 59°F to 92°F | TRUE |
| 29 | July 12 - July 18 | 67°F to 83°F | 61°F to 90°F | TRUE |
| 30 | July 19 - July 25 | 67°F to 84°F | 58°F to 93°F | TRUE |
| 31 | July 26 - August 01 | 66°F to 83°F | 57°F to 91°F | TRUE |
| 32 | August 02 - August 08 | 65°F to 82°F | 57°F to 90°F | TRUE |
| 33 | August 09 - August 15 | 66°F to 83°F | 57°F to 92°F | TRUE |
| 34 | August 16 - August 22 | 65°F to 81°F | 56°F to 88°F | TRUE |
| 35 | August 23 - August 29 | 65°F to 81°F | 57°F to 89°F | TRUE |
| 36 | August 30 - September 05 | 63°F to 78°F | 53°F to 88°F | TRUE |
| 37 | September 06 - September 12 | 62°F to 78°F | 53°F to 89°F | TRUE |
| 38 | September 13 - September 19 | 58°F to 74°F | 48°F to 82°F | TRUE |
| 39 | September 20 - September 26 | 54°F to 71°F | 43°F to 85°F | TRUE |
| 40 | September 27 - October 03 | 54°F to 70°F | 44°F to 85°F | TRUE |
| 41 | October 04 - October 10 | 51°F to 66°F | 39°F to 80°F | TRUE |
| 42 | October 11 - October 17 | 49°F to 64°F | 42°F to 78°F | |
| 43 | October 18 - October 24 | 46°F to 61°F | 35°F to 76°F | |
| 44 | October 25 - October 31 | 47°F to 61°F | 37°F to 73°F | |
| 45 | November 01 - November 07 | 40°F to 55°F | 28°F to 72°F | |
| 46 | November 08 - November 14 | 39°F to 55°F | 20°F to 72°F | |
| 47 | November 15 - November 21 | 32°F to 46°F | 20°F to 63°F | |
| 48 | November 22 - November 28 | 35°F to 47°F | 26°F to 59°F | |
| 49 | November 29 - December 05 | 32°F to 44°F | 22°F to 56°F | |
| 50 | December 06 - December 12 | 32°F to 44°F | 23°F to 59°F | |
| 51 | December 13 - December 19 | 30°F to 41°F | 13°F to 60°F | |
| 52 | December 20 - December 26 | 26°F to 40°F | -1°F to 56°F | |
| 53 | December 27 - December 31 | 33°F to 44°F | 13°F to 56°F |
Days with suitable temperature for growing Summer squash in Pennsylvania
For more precise weather statisctics and planting information, please select a County in Pennsylvania.
Adams County
Allegheny County
Armstrong County
Beaver County
Bedford County
Berks County
Blair County
Bradford County
Bucks County
Butler County
Cambria County
Cameron County
Carbon County
Centre County
Chester County
Clarion County
Clearfield County
Clinton County
Columbia County
Crawford County
Cumberland County
Dauphin County
Delaware County
Elk County
Erie County
Fayette County
Forest County
Franklin County
Fulton County
Greene County
Huntingdon County
Indiana County
Jefferson County
Juniata County
Lackawanna County
Lancaster County
Lawrence County
Lebanon County
Lehigh County
Luzerne County
Lycoming County
McKean County
Mercer County
Mifflin County
Monroe County
Montgomery County
Montour County
Northampton County
Northumberland County
Perry County
Philadelphia County
Pike County
Potter County
Schuylkill County
Snyder County
Somerset County
Sullivan County
Susquehanna County
Tioga County
Union County
Venango County
Warren County
Washington County
Wayne County
Westmoreland County
Wyoming County
York County
All data is provided “as is” without warranty or any representation of accuracy, timeliness or completeness.
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Average daily temperatures were calculated using
