Last frost date in Danville, IL

Average last frost
April 21

In Danville, the last spring frost comes around April 21 in an average year. Wait until May 7 if you want 90% odds of no more frost. The first fall frost usually arrives about October 20, which leaves 181 frost-free days. An early freeze before October 6 happens one year in ten.

Safe after (10% risk)
May 7
Average first frost
Oct 20
Frost-free season
181 days
Hard freeze (28°F) ends
Apr 8
Next 7 nights in Danville

No frost in the next 7 nights

Later than usual: the average first frost here is October 20.

National Weather Service forecast, updated Oct 22, 12:57 UTC

  1. ThuOct 2244°
  2. FriOct 2343°
  3. SatOct 2444°
  4. SunOct 2547°
  5. MonOct 2647°
  6. TueOct 2745°
  7. WedOct 2845°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Apr 21First frost Oct 20181 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND181 frost-free days
Frost risk through the year at Danville, 2.0 miles from Danville.

Planting calendar for Danville

Windows count forward or back from the average frost dates above. Click a crop for dates across Illinois.

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesApr 28–May 12
PumpkinsMay 5–May 19
SunflowersApr 21–May 12
CucumbersMay 5–May 12
CornApr 28–May 12
Sweet potatoesMay 12–May 26
WatermelonMay 5–May 19
Green beansApr 28–May 19
ZucchiniApr 28–May 12
OkraMay 12–May 26
PeppersMay 5–May 19
BasilApr 28–May 12
Butternut squashApr 28–May 12
CantaloupeMay 5–May 19
EggplantMay 5–May 19
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesMar 24–Apr 7
OnionsMar 10–Mar 31
CarrotsMar 31–May 5
LettuceApr 7–Apr 28
BroccoliMar 24–Apr 7
BeetsMar 24–May 5
PeasMar 10–Mar 24
CabbageMar 24–Apr 7
RadishesMar 17–Apr 28
Brussels sproutsApr 7–Apr 21
SpinachMar 10–Mar 31
CilantroApr 7–Apr 28
KaleMar 24–Apr 7
Collard greensMar 24–Apr 7
TurnipsMar 24–Apr 7
DillApr 21–May 5
CeleryApr 28–May 5
CauliflowerApr 7–Apr 21
LeeksApr 7–Apr 21
Swiss chardApr 7–May 5
ParsleyApr 7–Apr 28
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsOct 6–Nov 10
GarlicSep 29–Nov 3
Daffodil bulbsSep 22–Nov 3
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesMar 24–Apr 7
AsparagusMar 24–Apr 7

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FApr 6Apr 21May 7Oct 6Oct 20Nov 1
Hard freeze, 28°FMar 25Apr 8Apr 24Oct 17Oct 31Nov 13

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 Danville (USC00112140) sits 2.0 miles from the center of Danville at 555 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 Danville, IL?

The average last frost date in Danville is April 21, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 7.

When is the first frost in Danville?

The first frost in fall usually comes around October 20. One year in ten it arrives before October 6.

How long is the growing season in Danville?

About 181 days between the average last and first frost.

When should I plant tomatoes in Danville?

Plant tomato seedlings outside from April 28 to May 12. Start seeds indoors six to eight weeks earlier.

Nearby in Illinois

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