Last frost date in Security-Widefield, CO

Average last frost
May 3

In Security-Widefield, the last spring frost comes around May 3 in an average year. Wait until May 15 if you want 90% odds of no more frost. The first fall frost usually arrives about October 8, which leaves 158 frost-free days. An early freeze before September 26 happens one year in ten.

Safe after (10% risk)
May 15
Average first frost
Oct 8
Frost-free season
158 days
Hard freeze (28°F) ends
Apr 24
Next 7 nights in Security-Widefield

Frost possible in low spots Mon night, low 34°F

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

  1. ThuOct 2250°
  2. FriOct 2346°
  3. SatOct 2439°
  4. SunOct 2537°
  5. MonOct 2634°possible frost
  6. TueOct 2735°possible frost
  7. WedOct 2837°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost May 3First frost Oct 8158 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND158 frost-free days
Frost risk through the year at Colorado Springs Municipal Airport, 4.3 miles from Security-Widefield.

Planting calendar for Security-Widefield

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

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesMay 10–May 24
PumpkinsMay 17–May 31
SunflowersMay 3–May 24
CucumbersMay 17–May 24
CornMay 10–May 24
Sweet potatoesMay 24–Jun 7
WatermelonMay 17–May 31
Green beansMay 10–May 31
ZucchiniMay 10–May 24
OkraMay 24–Jun 7
PeppersMay 17–May 31
BasilMay 10–May 24
Butternut squashMay 10–May 24
CantaloupeMay 17–May 31
EggplantMay 17–May 31
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesApr 5–Apr 19
OnionsMar 22–Apr 12
CarrotsApr 12–May 17
LettuceApr 19–May 10
BroccoliApr 5–Apr 19
BeetsApr 5–May 17
PeasMar 22–Apr 5
CabbageApr 5–Apr 19
RadishesMar 29–May 10
Brussels sproutsApr 19–May 3
SpinachMar 22–Apr 12
CilantroApr 19–May 10
KaleApr 5–Apr 19
Collard greensApr 5–Apr 19
TurnipsApr 5–Apr 19
DillMay 3–May 17
CeleryMay 10–May 17
CauliflowerApr 19–May 3
LeeksApr 19–May 3
Swiss chardApr 19–May 17
ParsleyApr 19–May 10
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsSep 24–Oct 29
GarlicSep 17–Oct 22
Daffodil bulbsSep 10–Oct 22
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesApr 5–Apr 19
AsparagusApr 5–Apr 19

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FApr 22May 3May 15Sep 26Oct 8Oct 19
Hard freeze, 28°FApr 8Apr 24May 5Oct 4Oct 16Oct 29

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 Colorado Springs Municipal Airport (USW00093037) sits 4.3 miles from the center of Security-Widefield at 6,181 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 Security-Widefield, CO?

The average last frost date in Security-Widefield is May 3, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 15.

When is the first frost in Security-Widefield?

The first frost in fall usually comes around October 8. One year in ten it arrives before September 26.

How long is the growing season in Security-Widefield?

About 158 days between the average last and first frost.

When should I plant tomatoes in Security-Widefield?

Plant tomato seedlings outside from May 10 to May 24. Start seeds indoors six to eight weeks earlier.

Nearby in Colorado

All 34 cities in Colorado