Last frost date in Lenexa, KS
In Lenexa, the last spring frost comes around April 10 in an average year. Wait until April 24 if you want 90% odds of no more frost. The first fall frost usually arrives about October 29, which leaves 202 frost-free days. An early freeze before October 13 happens one year in ten.
- Safe after (10% risk)
- Apr 24
- Average first frost
- Oct 29
- Frost-free season
- 202 days
- Hard freeze (28°F) ends
- Mar 31
No frost in the next 7 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2255°
- FriOct 2357°
- SatOct 2456°
- SunOct 2556°
- MonOct 2651°
- TueOct 2748°
- WedOct 2851°
Planting calendar for Lenexa
Windows count forward or back from the average frost dates above. Click a crop for dates across Kansas.
TomatoesApr 17–May 1
PumpkinsApr 24–May 8
SunflowersApr 10–May 1
CucumbersApr 24–May 1
CornApr 17–May 1
Sweet potatoesMay 1–May 15
WatermelonApr 24–May 8
Green beansApr 17–May 8
ZucchiniApr 17–May 1
OkraMay 1–May 15
PeppersApr 24–May 8
BasilApr 17–May 1
Butternut squashApr 17–May 1
CantaloupeApr 24–May 8
EggplantApr 24–May 8
PotatoesMar 13–Mar 27
OnionsFeb 27–Mar 20
CarrotsMar 20–Apr 24
LettuceMar 27–Apr 17
BroccoliMar 13–Mar 27
BeetsMar 13–Apr 24
PeasFeb 27–Mar 13
CabbageMar 13–Mar 27
RadishesMar 6–Apr 17
Brussels sproutsMar 27–Apr 10
SpinachFeb 27–Mar 20
CilantroMar 27–Apr 17
KaleMar 13–Mar 27
Collard greensMar 13–Mar 27
TurnipsMar 13–Mar 27
DillApr 10–Apr 24
CeleryApr 17–Apr 24
CauliflowerMar 27–Apr 10
LeeksMar 27–Apr 10
Swiss chardMar 27–Apr 24
ParsleyMar 27–Apr 17
Tulip bulbsOct 15–Nov 19
GarlicOct 8–Nov 12
Daffodil bulbsOct 1–Nov 12
StrawberriesMar 13–Mar 27
AsparagusMar 13–Mar 27Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Mar 27 | Apr 10 | Apr 24 | Oct 13 | Oct 29 | Nov 12 |
| Hard freeze, 28°F | Mar 13 | Mar 31 | Apr 17 | Oct 23 | Nov 6 | Nov 25 |
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 Olathe 3E (USC00145972) sits 5.9 miles from the center of Lenexa at 1,055 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 Lenexa, KS?
The average last frost date in Lenexa is April 10, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 24.
When is the first frost in Lenexa?
The first frost in fall usually comes around October 29. One year in ten it arrives before October 13.
How long is the growing season in Lenexa?
About 202 days between the average last and first frost.
When should I plant tomatoes in Lenexa?
Plant tomato seedlings outside from April 17 to May 1. Start seeds indoors six to eight weeks earlier.
Nearby in Kansas
- ShawneeApr 16
- OlatheApr 10
- Overland ParkApr 10
- Prairie VillageApr 4
- LeawoodApr 8
- Kansas CityApr 4
- GardnerApr 13
- LawrenceApr 12
- LeavenworthApr 12
- TopekaApr 16
- EmporiaApr 15
- ManhattanApr 16