Last frost date in Laramie, WY

Average last frost
June 7

Expect the last frost in Laramie around June 7. Frost after June 29 happens in only one year out of ten. The first fall frost usually arrives about September 4, which leaves 88 frost-free days. An early freeze before August 17 happens one year in ten.

Safe after (10% risk)
Jun 29
Average first frost
Sep 4
Frost-free season
88 days
Hard freeze (28°F) ends
May 22
Next 7 nights in Laramie

Frost likely Sat night, low 32°F

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

  1. ThuOct 2245°
  2. FriOct 2336°possible frost
  3. SatOct 2432°frost
  4. SunOct 2530°frost
  5. MonOct 2629°frost
  6. TueOct 2731°frost
  7. WedOct 2831°frost
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Jun 7First frost Sep 488 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND88 frost-free days
Frost risk through the year at Laramie 2 NW, 2.0 miles from Laramie.

Planting calendar for Laramie

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

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesJun 14–Jun 28
PumpkinsJun 21–Jul 5
SunflowersJun 7–Jun 28
CucumbersJun 21–Jun 28
CornJun 14–Jun 28
Sweet potatoesJun 28–Jul 12
WatermelonJun 21–Jul 5
Green beansJun 14–Jul 5
ZucchiniJun 14–Jun 28
OkraJun 28–Jul 12
PeppersJun 21–Jul 5
BasilJun 14–Jun 28
Butternut squashJun 14–Jun 28
CantaloupeJun 21–Jul 5
EggplantJun 21–Jul 5
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesMay 10–May 24
OnionsApr 26–May 17
CarrotsMay 17–Jun 21
LettuceMay 24–Jun 14
BroccoliMay 10–May 24
BeetsMay 10–Jun 21
PeasApr 26–May 10
CabbageMay 10–May 24
RadishesMay 3–Jun 14
Brussels sproutsMay 24–Jun 7
SpinachApr 26–May 17
CilantroMay 24–Jun 14
KaleMay 10–May 24
Collard greensMay 10–May 24
TurnipsMay 10–May 24
DillJun 7–Jun 21
CeleryJun 14–Jun 21
CauliflowerMay 24–Jun 7
LeeksMay 24–Jun 7
Swiss chardMay 24–Jun 21
ParsleyMay 24–Jun 14
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsAug 21–Sep 25
GarlicAug 14–Sep 18
Daffodil bulbsAug 7–Sep 18
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesMay 10–May 24
AsparagusMay 10–May 24

The frost-free season here is short for tomatoes, pumpkins, sunflowers, corn, sweet potatoes, watermelon, peppers, basil, butternut squash, cantaloupe, eggplant. Start them indoors and look for early varieties.

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FMay 23Jun 7Jun 29Aug 17Sep 4Sep 18
Hard freeze, 28°FMay 9May 22Jun 6Sep 2Sep 14Sep 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 Laramie 2 NW (USC00485435) sits 2.0 miles from the center of Laramie at 7,140 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 Laramie, WY?

The average last frost date in Laramie is June 7, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after June 29.

When is the first frost in Laramie?

The first frost in fall usually comes around September 4. One year in ten it arrives before August 17.

How long is the growing season in Laramie?

About 88 days between the average last and first frost.

When should I plant tomatoes in Laramie?

Plant tomato seedlings outside from June 14 to June 28. Start seeds indoors six to eight weeks earlier.

Nearby in Wyoming

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