Last frost date in Phoenixville, PA
Expect the last frost in Phoenixville around April 18. Frost after May 4 happens in only one year out of ten. The first fall frost usually arrives about October 27, which leaves 192 frost-free days. An early freeze before October 12 happens one year in ten.
- Safe after (10% risk)
- May 4
- Average first frost
- Oct 27
- Frost-free season
- 192 days
- Hard freeze (28°F) ends
- Apr 3
Frost possible in low spots Fri night, low 33°F
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2240°
- FriOct 2333°possible frost
- SatOct 2434°possible frost
- SunOct 2537°
- MonOct 2644°
- TueOct 2744°
- WedOct 2844°
Planting calendar for Phoenixville
Windows count forward or back from the average frost dates above. Click a crop for dates across Pennsylvania.
TomatoesApr 25–May 9
PumpkinsMay 2–May 16
SunflowersApr 18–May 9
CucumbersMay 2–May 9
CornApr 25–May 9
Sweet potatoesMay 9–May 23
WatermelonMay 2–May 16
Green beansApr 25–May 16
ZucchiniApr 25–May 9
OkraMay 9–May 23
PeppersMay 2–May 16
BasilApr 25–May 9
Butternut squashApr 25–May 9
CantaloupeMay 2–May 16
EggplantMay 2–May 16
PotatoesMar 21–Apr 4
OnionsMar 7–Mar 28
CarrotsMar 28–May 2
LettuceApr 4–Apr 25
BroccoliMar 21–Apr 4
BeetsMar 21–May 2
PeasMar 7–Mar 21
CabbageMar 21–Apr 4
RadishesMar 14–Apr 25
Brussels sproutsApr 4–Apr 18
SpinachMar 7–Mar 28
CilantroApr 4–Apr 25
KaleMar 21–Apr 4
Collard greensMar 21–Apr 4
TurnipsMar 21–Apr 4
DillApr 18–May 2
CeleryApr 25–May 2
CauliflowerApr 4–Apr 18
LeeksApr 4–Apr 18
Swiss chardApr 4–May 2
ParsleyApr 4–Apr 25
Tulip bulbsOct 13–Nov 17
GarlicOct 6–Nov 10
Daffodil bulbsSep 29–Nov 10
StrawberriesMar 21–Apr 4
AsparagusMar 21–Apr 4Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Apr 3 | Apr 18 | May 4 | Oct 12 | Oct 27 | Nov 9 |
| Hard freeze, 28°F | Mar 20 | Apr 3 | Apr 18 | Oct 24 | Nov 6 | Nov 23 |
Read the spring 10% column as the date after which only one year in ten still gets frost. That is the safer date for tomatoes, peppers and basil.
Where these numbers come from
NOAA station Phoenixville 1 E (USC00366927) sits 1.8 miles from the center of Phoenixville at 85 feet. Its averages cover 1991 to 2020. Low spots, valleys and open fields can keep getting frost a week or two after the station stops; city centers and lakeshores usually get less of it.
Questions
When is the last frost in Phoenixville, PA?
The average last frost date in Phoenixville is April 18, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 4.
When is the first frost in Phoenixville?
The first frost in fall usually comes around October 27. One year in ten it arrives before October 12.
How long is the growing season in Phoenixville?
About 192 days between the average last and first frost.
When should I plant tomatoes in Phoenixville?
Plant tomato seedlings outside from April 25 to May 9. Start seeds indoors six to eight weeks earlier.
Nearby in Pennsylvania
- King of PrussiaApr 8
- NorristownApr 8
- PottstownApr 20
- Drexel HillApr 2
- ChesterMar 30
- PhiladelphiaMar 30
- ReadingApr 14
- AllentownApr 20
- BethlehemApr 20
- LevittownApr 21
- EastonApr 18
- LancasterApr 19