Last frost date in Harrisburg, NC
In Harrisburg, the last spring frost comes around April 1 in an average year. Wait until April 16 if you want 90% odds of no more frost. The first fall frost usually arrives about November 2, which leaves 215 frost-free days. An early freeze before October 21 happens one year in ten.
- Safe after (10% risk)
- Apr 16
- Average first frost
- Nov 2
- Frost-free season
- 215 days
- Hard freeze (28°F) ends
- Mar 20
No frost in the next 7 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2241°
- FriOct 2343°
- SatOct 2442°
- SunOct 2542°
- MonOct 2641°
- TueOct 2746°
- WedOct 2847°
Planting calendar for Harrisburg
Windows count forward or back from the average frost dates above. Click a crop for dates across North Carolina.
TomatoesApr 8–Apr 22
PumpkinsApr 15–Apr 29
SunflowersApr 1–Apr 22
CucumbersApr 15–Apr 22
CornApr 8–Apr 22
Sweet potatoesApr 22–May 6
WatermelonApr 15–Apr 29
Green beansApr 8–Apr 29
ZucchiniApr 8–Apr 22
OkraApr 22–May 6
PeppersApr 15–Apr 29
BasilApr 8–Apr 22
Butternut squashApr 8–Apr 22
CantaloupeApr 15–Apr 29
EggplantApr 15–Apr 29
PotatoesMar 4–Mar 18
OnionsFeb 18–Mar 11
CarrotsMar 11–Apr 15
LettuceMar 18–Apr 8
BroccoliMar 4–Mar 18
BeetsMar 4–Apr 15
PeasFeb 18–Mar 4
CabbageMar 4–Mar 18
RadishesFeb 25–Apr 8
Brussels sproutsMar 18–Apr 1
SpinachFeb 18–Mar 11
CilantroMar 18–Apr 8
KaleMar 4–Mar 18
Collard greensMar 4–Mar 18
TurnipsMar 4–Mar 18
DillApr 1–Apr 15
CeleryApr 8–Apr 15
CauliflowerMar 18–Apr 1
LeeksMar 18–Apr 1
Swiss chardMar 18–Apr 15
ParsleyMar 18–Apr 8
Tulip bulbsOct 19–Nov 23
GarlicOct 12–Nov 16
Daffodil bulbsOct 5–Nov 16
StrawberriesMar 4–Mar 18
AsparagusMar 4–Mar 18Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Mar 16 | Apr 1 | Apr 16 | Oct 21 | Nov 2 | Nov 15 |
| Hard freeze, 28°F | Feb 28 | Mar 20 | Apr 5 | Nov 1 | Nov 13 | Dec 1 |
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 Concord (USC00311975) sits 8.0 miles from the center of Harrisburg at 700 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 Harrisburg, NC?
The average last frost date in Harrisburg is April 1, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 16.
When is the first frost in Harrisburg?
The first frost in fall usually comes around November 2. One year in ten it arrives before October 21.
How long is the growing season in Harrisburg?
About 215 days between the average last and first frost.
When should I plant tomatoes in Harrisburg?
Plant tomato seedlings outside from April 8 to April 22. Start seeds indoors six to eight weeks earlier.
Nearby in North Carolina
- ConcordApr 1
- Mint HillMar 31
- KannapolisApr 1
- CharlotteMar 30
- MatthewsMar 31
- HuntersvilleMar 30
- Indian TrailMar 31
- CorneliusApr 1
- MooresvilleApr 9
- MonroeApr 3
- WaxhawMar 31
- SalisburyApr 6