Last frost date in Bethany, OK
In Bethany, the last spring frost comes around April 2 in an average year. Wait until April 18 if you want 90% odds of no more frost. The first fall frost usually arrives about November 4, which leaves 216 frost-free days. An early freeze before October 21 happens one year in ten.
- Safe after (10% risk)
- Apr 18
- Average first frost
- Nov 4
- Frost-free season
- 216 days
- Hard freeze (28°F) ends
- Mar 19
No frost in the next 7 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2258°
- FriOct 2359°
- SatOct 2459°
- SunOct 2558°
- MonOct 2653°
- TueOct 2752°
- WedOct 2854°
Planting calendar for Bethany
Windows count forward or back from the average frost dates above. Click a crop for dates across Oklahoma.
TomatoesApr 9–Apr 23
PumpkinsApr 16–Apr 30
SunflowersApr 2–Apr 23
CucumbersApr 16–Apr 23
CornApr 9–Apr 23
Sweet potatoesApr 23–May 7
WatermelonApr 16–Apr 30
Green beansApr 9–Apr 30
ZucchiniApr 9–Apr 23
OkraApr 23–May 7
PeppersApr 16–Apr 30
BasilApr 9–Apr 23
Butternut squashApr 9–Apr 23
CantaloupeApr 16–Apr 30
EggplantApr 16–Apr 30
PotatoesMar 5–Mar 19
OnionsFeb 19–Mar 12
CarrotsMar 12–Apr 16
LettuceMar 19–Apr 9
BroccoliMar 5–Mar 19
BeetsMar 5–Apr 16
PeasFeb 19–Mar 5
CabbageMar 5–Mar 19
RadishesFeb 26–Apr 9
Brussels sproutsMar 19–Apr 2
SpinachFeb 19–Mar 12
CilantroMar 19–Apr 9
KaleMar 5–Mar 19
Collard greensMar 5–Mar 19
TurnipsMar 5–Mar 19
DillApr 2–Apr 16
CeleryApr 9–Apr 16
CauliflowerMar 19–Apr 2
LeeksMar 19–Apr 2
Swiss chardMar 19–Apr 16
ParsleyMar 19–Apr 9
Tulip bulbsOct 21–Nov 25
GarlicOct 14–Nov 18
Daffodil bulbsOct 7–Nov 18
StrawberriesMar 5–Mar 19
AsparagusMar 5–Mar 19Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Mar 14 | Apr 2 | Apr 18 | Oct 21 | Nov 4 | Nov 18 |
| Hard freeze, 28°F | Feb 28 | Mar 19 | Apr 5 | Oct 31 | Nov 13 | Nov 30 |
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 Oklahoma City Post Airport (USW00003954) sits 1.9 miles from the center of Bethany at 1,297 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 Bethany, OK?
The average last frost date in Bethany is April 2, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 18.
When is the first frost in Bethany?
The first frost in fall usually comes around November 4. One year in ten it arrives before October 21.
How long is the growing season in Bethany?
About 216 days between the average last and first frost.
When should I plant tomatoes in Bethany?
Plant tomato seedlings outside from April 9 to April 23. Start seeds indoors six to eight weeks earlier.
Nearby in Oklahoma
- YukonApr 2
- Oklahoma CityApr 4
- MustangApr 4
- Del CityApr 2
- Midwest CityApr 2
- MooreMar 31
- EdmondApr 10
- El RenoApr 6
- NormanApr 3
- ShawneeMar 30
- StillwaterApr 5
- EnidApr 6