Last frost date in Derby, KS
In Derby, the last spring frost comes around April 14 in an average year. Wait until April 30 if you want 90% odds of no more frost. The first fall frost usually arrives about October 22, which leaves 189 frost-free days. An early freeze before October 5 happens one year in ten.
- Safe after (10% risk)
- Apr 30
- Average first frost
- Oct 22
- Frost-free season
- 189 days
- Hard freeze (28°F) ends
- Apr 3
No frost in the next 7 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2255°
- FriOct 2357°
- SatOct 2455°
- SunOct 2555°
- MonOct 2649°
- TueOct 2747°
- WedOct 2851°
Planting calendar for Derby
Windows count forward or back from the average frost dates above. Click a crop for dates across Kansas.
TomatoesApr 21–May 5
PumpkinsApr 28–May 12
SunflowersApr 14–May 5
CucumbersApr 28–May 5
CornApr 21–May 5
Sweet potatoesMay 5–May 19
WatermelonApr 28–May 12
Green beansApr 21–May 12
ZucchiniApr 21–May 5
OkraMay 5–May 19
PeppersApr 28–May 12
BasilApr 21–May 5
Butternut squashApr 21–May 5
CantaloupeApr 28–May 12
EggplantApr 28–May 12
PotatoesMar 17–Mar 31
OnionsMar 3–Mar 24
CarrotsMar 24–Apr 28
LettuceMar 31–Apr 21
BroccoliMar 17–Mar 31
BeetsMar 17–Apr 28
PeasMar 3–Mar 17
CabbageMar 17–Mar 31
RadishesMar 10–Apr 21
Brussels sproutsMar 31–Apr 14
SpinachMar 3–Mar 24
CilantroMar 31–Apr 21
KaleMar 17–Mar 31
Collard greensMar 17–Mar 31
TurnipsMar 17–Mar 31
DillApr 14–Apr 28
CeleryApr 21–Apr 28
CauliflowerMar 31–Apr 14
LeeksMar 31–Apr 14
Swiss chardMar 31–Apr 28
ParsleyMar 31–Apr 21
Tulip bulbsOct 8–Nov 12
GarlicOct 1–Nov 5
Daffodil bulbsSep 24–Nov 5
StrawberriesMar 17–Mar 31
AsparagusMar 17–Mar 31Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Mar 30 | Apr 14 | Apr 30 | Oct 5 | Oct 22 | Nov 4 |
| Hard freeze, 28°F | Mar 16 | Apr 3 | Apr 19 | Oct 16 | Oct 31 | Nov 15 |
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 Haysville 3SE (USC00143545) sits 4.2 miles from the center of Derby at 1,240 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 Derby, KS?
The average last frost date in Derby is April 14, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 30.
When is the first frost in Derby?
The first frost in fall usually comes around October 22. One year in ten it arrives before October 5.
How long is the growing season in Derby?
About 189 days between the average last and first frost.
When should I plant tomatoes in Derby?
Plant tomato seedlings outside from April 21 to May 5. Start seeds indoors six to eight weeks earlier.
Nearby in Kansas
- WichitaApr 11
- HutchinsonApr 18
- EmporiaApr 15
- SalinaApr 18
- Junction CityApr 12
- ManhattanApr 16
- TopekaApr 16
- PittsburgApr 7
- HaysApr 19
- LawrenceApr 12
- Dodge CityApr 21
- GardnerApr 13