Last frost date in Allen, TX
Expect the last frost in Allen around March 18. Frost after April 7 happens in only one year out of ten. The first fall frost usually arrives about November 11, which leaves 239 frost-free days. An early freeze before October 27 happens one year in ten.
- Safe after (10% risk)
- Apr 7
- Average first frost
- Nov 11
- Frost-free season
- 239 days
- Hard freeze (28°F) ends
- Mar 4
No frost in the next 7 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2257°
- FriOct 2359°
- SatOct 2460°
- SunOct 2557°
- MonOct 2659°
- TueOct 2756°
- WedOct 2857°
Planting calendar for Allen
Windows count forward or back from the average frost dates above. Click a crop for dates across Texas.
TomatoesMar 25–Apr 8
PumpkinsApr 1–Apr 15
SunflowersMar 18–Apr 8
CucumbersApr 1–Apr 8
CornMar 25–Apr 8
Sweet potatoesApr 8–Apr 22
WatermelonApr 1–Apr 15
Green beansMar 25–Apr 15
ZucchiniMar 25–Apr 8
OkraApr 8–Apr 22
PeppersApr 1–Apr 15
BasilMar 25–Apr 8
Butternut squashMar 25–Apr 8
CantaloupeApr 1–Apr 15
EggplantApr 1–Apr 15
PotatoesFeb 18–Mar 4
OnionsFeb 4–Feb 25
CarrotsFeb 25–Apr 1
LettuceMar 4–Mar 25
BroccoliFeb 18–Mar 4
BeetsFeb 18–Apr 1
PeasFeb 4–Feb 18
CabbageFeb 18–Mar 4
RadishesFeb 11–Mar 25
Brussels sproutsMar 4–Mar 18
SpinachFeb 4–Feb 25
CilantroMar 4–Mar 25
KaleFeb 18–Mar 4
Collard greensFeb 18–Mar 4
TurnipsFeb 18–Mar 4
DillMar 18–Apr 1
CeleryMar 25–Apr 1
CauliflowerMar 4–Mar 18
LeeksMar 4–Mar 18
Swiss chardMar 4–Apr 1
ParsleyMar 4–Mar 25
Tulip bulbsOct 28–Dec 2
GarlicOct 21–Nov 25
Daffodil bulbsOct 14–Nov 25
StrawberriesFeb 18–Mar 4
AsparagusFeb 18–Mar 4Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Feb 28 | Mar 18 | Apr 7 | Oct 27 | Nov 11 | Dec 1 |
| Hard freeze, 28°F | Feb 9 | Mar 4 | Mar 22 | Nov 6 | Nov 24 | Dec 14 |
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 Mckinney Municipal Airport (USW00053914) sits 7.0 miles from the center of Allen at 580 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 Allen, TX?
The average last frost date in Allen is March 18, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 7.
When is the first frost in Allen?
The first frost in fall usually comes around November 11. One year in ten it arrives before October 27.
How long is the growing season in Allen?
About 239 days between the average last and first frost.
When should I plant tomatoes in Allen?
Plant tomato seedlings outside from March 25 to April 8. Start seeds indoors six to eight weeks earlier.