Last frost date in Lake in the Hills, IL
In Lake in the Hills, the last spring frost comes around April 25 in an average year. Wait until May 9 if you want 90% odds of no more frost. The first fall frost usually arrives about October 22, which leaves 179 frost-free days. An early freeze before October 7 happens one year in ten.
- Safe after (10% risk)
- May 9
- Average first frost
- Oct 22
- Frost-free season
- 179 days
- Hard freeze (28°F) ends
- Apr 12
No frost in the next 7 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2247°
- FriOct 2347°
- SatOct 2450°
- SunOct 2550°
- MonOct 2647°
- TueOct 2744°
- WedOct 2845°
Planting calendar for Lake in the Hills
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 8–Nov 12
GarlicOct 1–Nov 5
Daffodil bulbsSep 24–Nov 5
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 9 | Oct 7 | Oct 22 | Nov 4 |
| Hard freeze, 28°F | Mar 31 | Apr 12 | Apr 27 | Oct 20 | Nov 1 | 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 Crystal Lake 4NW (USC00112048) sits 7.0 miles from the center of Lake in the Hills at 940 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 Lake in the Hills, IL?
The average last frost date in Lake in the Hills is April 25, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 9.
When is the first frost in Lake in the Hills?
The first frost in fall usually comes around October 22. One year in ten it arrives before October 7.
How long is the growing season in Lake in the Hills?
About 179 days between the average last and first frost.
When should I plant tomatoes in Lake in the Hills?
Plant tomato seedlings outside from May 2 to May 16. Start seeds indoors six to eight weeks earlier.
Nearby in Illinois
- AlgonquinApr 26
- Crystal LakeApr 25
- CarpentersvilleApr 26
- HuntleyApr 25
- ElginApr 26
- WoodstockApr 25
- McHenryMay 1
- Hoffman EstatesApr 30
- StreamwoodApr 30
- South ElginApr 26
- PalatineApr 25
- SchaumburgApr 30