Last frost date in Ardmore, OK
In Ardmore, the last spring frost comes around March 15 in an average year. Wait until April 2 if you want 90% odds of no more frost. The first fall frost usually arrives about November 14, which leaves 244 frost-free days. An early freeze before October 29 happens one year in ten.
- Safe after (10% risk)
- Apr 2
- Average first frost
- Nov 14
- Frost-free season
- 244 days
- Hard freeze (28°F) ends
- Mar 3
No frost in the next 7 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2255°
- FriOct 2355°
- SatOct 2457°
- SunOct 2554°
- MonOct 2654°
- TueOct 2753°
- WedOct 2853°
Planting calendar for Ardmore
Windows count forward or back from the average frost dates above. Click a crop for dates across Oklahoma.
TomatoesMar 22–Apr 5
PumpkinsMar 29–Apr 12
SunflowersMar 15–Apr 5
CucumbersMar 29–Apr 5
CornMar 22–Apr 5
Sweet potatoesApr 5–Apr 19
WatermelonMar 29–Apr 12
Green beansMar 22–Apr 12
ZucchiniMar 22–Apr 5
OkraApr 5–Apr 19
PeppersMar 29–Apr 12
BasilMar 22–Apr 5
Butternut squashMar 22–Apr 5
CantaloupeMar 29–Apr 12
EggplantMar 29–Apr 12
PotatoesFeb 15–Mar 1
OnionsFeb 1–Feb 22
CarrotsFeb 22–Mar 29
LettuceMar 1–Mar 22
BroccoliFeb 15–Mar 1
BeetsFeb 15–Mar 29
PeasFeb 1–Feb 15
CabbageFeb 15–Mar 1
RadishesFeb 8–Mar 22
Brussels sproutsMar 1–Mar 15
SpinachFeb 1–Feb 22
CilantroMar 1–Mar 22
KaleFeb 15–Mar 1
Collard greensFeb 15–Mar 1
TurnipsFeb 15–Mar 1
DillMar 15–Mar 29
CeleryMar 22–Mar 29
CauliflowerMar 1–Mar 15
LeeksMar 1–Mar 15
Swiss chardMar 1–Mar 29
ParsleyMar 1–Mar 22
Tulip bulbsOct 31–Dec 5
GarlicOct 24–Nov 28
Daffodil bulbsOct 17–Nov 28
StrawberriesFeb 15–Mar 1
AsparagusFeb 15–Mar 1Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Feb 24 | Mar 15 | Apr 2 | Oct 29 | Nov 14 | Dec 2 |
| Hard freeze, 28°F | Feb 10 | Mar 3 | Mar 22 | Nov 6 | Nov 26 | Dec 13 |
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 Ardmore (USC00340292) sits 2.2 miles from the center of Ardmore at 841 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 Ardmore, OK?
The average last frost date in Ardmore is March 15, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 2.
When is the first frost in Ardmore?
The first frost in fall usually comes around November 14. One year in ten it arrives before October 29.
How long is the growing season in Ardmore?
About 244 days between the average last and first frost.
When should I plant tomatoes in Ardmore?
Plant tomato seedlings outside from March 22 to April 5. Start seeds indoors six to eight weeks earlier.