Last frost date in Bettendorf, IA
In Bettendorf, the last spring frost comes around April 16 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 25, which leaves 190 frost-free days. An early freeze before October 11 happens one year in ten.
- Safe after (10% risk)
- Apr 30
- Average first frost
- Oct 25
- Frost-free season
- 190 days
- Hard freeze (28°F) ends
- Apr 6
No frost in the next 7 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2251°
- FriOct 2352°
- SatOct 2452°
- SunOct 2552°
- MonOct 2648°
- TueOct 2745°
- WedOct 2846°
Planting calendar for Bettendorf
Windows count forward or back from the average frost dates above. Click a crop for dates across Iowa.
TomatoesApr 23–May 7
PumpkinsApr 30–May 14
SunflowersApr 16–May 7
CucumbersApr 30–May 7
CornApr 23–May 7
Sweet potatoesMay 7–May 21
WatermelonApr 30–May 14
Green beansApr 23–May 14
ZucchiniApr 23–May 7
OkraMay 7–May 21
PeppersApr 30–May 14
BasilApr 23–May 7
Butternut squashApr 23–May 7
CantaloupeApr 30–May 14
EggplantApr 30–May 14
PotatoesMar 19–Apr 2
OnionsMar 5–Mar 26
CarrotsMar 26–Apr 30
LettuceApr 2–Apr 23
BroccoliMar 19–Apr 2
BeetsMar 19–Apr 30
PeasMar 5–Mar 19
CabbageMar 19–Apr 2
RadishesMar 12–Apr 23
Brussels sproutsApr 2–Apr 16
SpinachMar 5–Mar 26
CilantroApr 2–Apr 23
KaleMar 19–Apr 2
Collard greensMar 19–Apr 2
TurnipsMar 19–Apr 2
DillApr 16–Apr 30
CeleryApr 23–Apr 30
CauliflowerApr 2–Apr 16
LeeksApr 2–Apr 16
Swiss chardApr 2–Apr 30
ParsleyApr 2–Apr 23
Tulip bulbsOct 11–Nov 15
GarlicOct 4–Nov 8
Daffodil bulbsSep 27–Nov 8
StrawberriesMar 19–Apr 2
AsparagusMar 19–Apr 2Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Apr 2 | Apr 16 | Apr 30 | Oct 11 | Oct 25 | Nov 6 |
| Hard freeze, 28°F | Mar 21 | Apr 6 | Apr 21 | Oct 23 | Nov 2 | Nov 18 |
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 Le Claire L&d 14 (USC00134705) sits 4.0 miles from the center of Bettendorf at 577 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 Bettendorf, IA?
The average last frost date in Bettendorf is April 16, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 30.
When is the first frost in Bettendorf?
The first frost in fall usually comes around October 25. One year in ten it arrives before October 11.
How long is the growing season in Bettendorf?
About 190 days between the average last and first frost.
When should I plant tomatoes in Bettendorf?
Plant tomato seedlings outside from April 23 to May 7. Start seeds indoors six to eight weeks earlier.
Nearby in Iowa
- DavenportApr 19
- ClintonApr 22
- MuscatineApr 24
- Iowa CityApr 21
- CoralvilleApr 21
- North LibertyApr 21
- BurlingtonApr 15
- DubuqueApr 19
- MarionApr 28
- Cedar RapidsApr 27
- OttumwaApr 23
- WaterlooApr 27