Last frost date in Sapulpa, OK
Expect the last frost in Sapulpa around March 30. Frost after April 17 happens in only one year out of ten. The first fall frost usually arrives about November 4, which leaves 220 frost-free days. An early freeze before October 21 happens one year in ten.
- Safe after (10% risk)
- Apr 17
- Average first frost
- Nov 4
- Frost-free season
- 220 days
- Hard freeze (28°F) ends
- Mar 15
No frost in the next 7 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2253°
- FriOct 2353°
- SatOct 2455°
- SunOct 2553°
- MonOct 2652°
- TueOct 2748°
- WedOct 2851°
Planting calendar for Sapulpa
Windows count forward or back from the average frost dates above. Click a crop for dates across Oklahoma.
TomatoesApr 6–Apr 20
PumpkinsApr 13–Apr 27
SunflowersMar 30–Apr 20
CucumbersApr 13–Apr 20
CornApr 6–Apr 20
Sweet potatoesApr 20–May 4
WatermelonApr 13–Apr 27
Green beansApr 6–Apr 27
ZucchiniApr 6–Apr 20
OkraApr 20–May 4
PeppersApr 13–Apr 27
BasilApr 6–Apr 20
Butternut squashApr 6–Apr 20
CantaloupeApr 13–Apr 27
EggplantApr 13–Apr 27
PotatoesMar 2–Mar 16
OnionsFeb 16–Mar 9
CarrotsMar 9–Apr 13
LettuceMar 16–Apr 6
BroccoliMar 2–Mar 16
BeetsMar 2–Apr 13
PeasFeb 16–Mar 2
CabbageMar 2–Mar 16
RadishesFeb 23–Apr 6
Brussels sproutsMar 16–Mar 30
SpinachFeb 16–Mar 9
CilantroMar 16–Apr 6
KaleMar 2–Mar 16
Collard greensMar 2–Mar 16
TurnipsMar 2–Mar 16
DillMar 30–Apr 13
CeleryApr 6–Apr 13
CauliflowerMar 16–Mar 30
LeeksMar 16–Mar 30
Swiss chardMar 16–Apr 13
ParsleyMar 16–Apr 6
Tulip bulbsOct 21–Nov 25
GarlicOct 14–Nov 18
Daffodil bulbsOct 7–Nov 18
StrawberriesMar 2–Mar 16
AsparagusMar 2–Mar 16Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Mar 10 | Mar 30 | Apr 17 | Oct 21 | Nov 4 | Nov 20 |
| Hard freeze, 28°F | Feb 27 | Mar 15 | Apr 3 | Oct 31 | Nov 14 | Dec 2 |
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 Tulsa R L Jones Jr Airport (USW00053908) sits 8.1 miles from the center of Sapulpa at 638 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 Sapulpa, OK?
The average last frost date in Sapulpa is March 30, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 17.
When is the first frost in Sapulpa?
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 Sapulpa?
About 220 days between the average last and first frost.
When should I plant tomatoes in Sapulpa?
Plant tomato seedlings outside from April 6 to April 20. Start seeds indoors six to eight weeks earlier.
Nearby in Oklahoma
- JenksMar 30
- Sand SpringsMar 30
- BixbyApr 1
- TulsaMar 31
- Broken ArrowApr 1
- OwassoMar 31
- ClaremoreApr 7
- MuskogeeApr 7
- BartlesvilleApr 11
- StillwaterApr 5
- ShawneeMar 30
- Ponca CityApr 10