Last frost date in Carol Stream, IL
The average last frost in Carol Stream is April 25. By May 12 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about October 19, which leaves 174 frost-free days. An early freeze before October 5 happens one year in ten.
- Safe after (10% risk)
- May 12
- Average first frost
- Oct 19
- Frost-free season
- 174 days
- Hard freeze (28°F) ends
- Apr 14
No frost in the next 7 nights
Later than usual: the average first frost here is October 19.
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2248°
- FriOct 2348°
- SatOct 2450°
- SunOct 2551°
- MonOct 2649°
- TueOct 2746°
- WedOct 2846°
Planting calendar for Carol Stream
Windows count forward or back from the average frost dates above. Click a crop for dates across Illinois.
TomatoesMay 2–May 16
PumpkinsMay 9–May 23
SunflowersApr 25–May 16
CucumbersMay 9–May 16
CornMay 2–May 16
Sweet potatoesMay 16–May 30
WatermelonMay 9–May 23
Green beansMay 2–May 23
ZucchiniMay 2–May 16
OkraMay 16–May 30
PeppersMay 9–May 23
BasilMay 2–May 16
Butternut squashMay 2–May 16
CantaloupeMay 9–May 23
EggplantMay 9–May 23
PotatoesMar 28–Apr 11
OnionsMar 14–Apr 4
CarrotsApr 4–May 9
LettuceApr 11–May 2
BroccoliMar 28–Apr 11
BeetsMar 28–May 9
PeasMar 14–Mar 28
CabbageMar 28–Apr 11
RadishesMar 21–May 2
Brussels sproutsApr 11–Apr 25
SpinachMar 14–Apr 4
CilantroApr 11–May 2
KaleMar 28–Apr 11
Collard greensMar 28–Apr 11
TurnipsMar 28–Apr 11
DillApr 25–May 9
CeleryMay 2–May 9
CauliflowerApr 11–Apr 25
LeeksApr 11–Apr 25
Swiss chardApr 11–May 9
ParsleyApr 11–May 2
Tulip bulbsOct 5–Nov 9
GarlicSep 28–Nov 2
Daffodil bulbsSep 21–Nov 2
StrawberriesMar 28–Apr 11
AsparagusMar 28–Apr 11Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Apr 11 | Apr 25 | May 12 | Oct 5 | Oct 19 | Oct 30 |
| Hard freeze, 28°F | Mar 31 | Apr 14 | Apr 29 | Oct 16 | Oct 29 | Nov 12 |
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 West Chicago Dupage Airport (USW00094892) sits 5.8 miles from the center of Carol Stream at 754 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 Carol Stream, IL?
The average last frost date in Carol Stream is April 25, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 12.
When is the first frost in Carol Stream?
The first frost in fall usually comes around October 19. One year in ten it arrives before October 5.
How long is the growing season in Carol Stream?
About 174 days between the average last and first frost.
When should I plant tomatoes in Carol Stream?
Plant tomato seedlings outside from May 2 to May 16. Start seeds indoors six to eight weeks earlier.
Nearby in Illinois
- Glendale HeightsApr 28
- BloomingdaleApr 30
- BartlettApr 30
- Hanover ParkApr 30
- WheatonApr 28
- RoselleApr 30
- West ChicagoApr 25
- Glen EllynApr 28
- AddisonApr 16
- LombardApr 28
- StreamwoodApr 30
- SchaumburgApr 30