Last frost date in West Valley City, UT

Average last frost

April 8

The average last frost in West Valley City is April 8. By April 30 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about October 31, which leaves 204 frost-free days. An early freeze before October 17 happens one year in ten.

Safe after (10% risk): Apr 30
Average first frost: Oct 31
Frost-free season: 204 days
Hard freeze (28°F) ends: Mar 15

Next 7 nights in West Valley City

No frost in the next 7 nights

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

ThuOct 2249°
FriOct 2343°
SatOct 2441°
SunOct 2540°
MonOct 2641°
TueOct 2740°
WedOct 2843°

Frost risk through the year at Salt Lake City International Airport, 6.6 miles from West Valley City.

Planting calendar for West Valley City

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

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost

Warm-season crops

JanFebMarAprMayJunJulAugSepOctNovDec

TomatoesApr 15–Apr 29

PumpkinsApr 22–May 6

SunflowersApr 8–Apr 29

CucumbersApr 22–Apr 29

CornApr 15–Apr 29

Sweet potatoesApr 29–May 13

WatermelonApr 22–May 6

Green beansApr 15–May 6

ZucchiniApr 15–Apr 29

OkraApr 29–May 13

PeppersApr 22–May 6

BasilApr 15–Apr 29

Butternut squashApr 15–Apr 29

CantaloupeApr 22–May 6

EggplantApr 22–May 6

Cool-season crops

JanFebMarAprMayJunJulAugSepOctNovDec

PotatoesMar 11–Mar 25

OnionsFeb 25–Mar 18

CarrotsMar 18–Apr 22

LettuceMar 25–Apr 15

BroccoliMar 11–Mar 25

BeetsMar 11–Apr 22

PeasFeb 25–Mar 11

CabbageMar 11–Mar 25

RadishesMar 4–Apr 15

Brussels sproutsMar 25–Apr 8

SpinachFeb 25–Mar 18

CilantroMar 25–Apr 15

KaleMar 11–Mar 25

Collard greensMar 11–Mar 25

TurnipsMar 11–Mar 25

DillApr 8–Apr 22

CeleryApr 15–Apr 22

CauliflowerMar 25–Apr 8

LeeksMar 25–Apr 8

Swiss chardMar 25–Apr 22

ParsleyMar 25–Apr 15

Fall bulbs and garlic

JanFebMarAprMayJunJulAugSepOctNovDec

Tulip bulbsOct 17–Nov 21

GarlicOct 10–Nov 14

Daffodil bulbsOct 3–Nov 14

Perennials

JanFebMarAprMayJunJulAugSepOctNovDec

StrawberriesMar 11–Mar 25

AsparagusMar 11–Mar 25

Frost probabilities

Threshold	Spring, 90% chance later	Spring, 50%	Spring, 10%	Fall, 10% chance earlier	Fall, 50%	Fall, 90%
Light frost, 32°F	Mar 17	Apr 8	Apr 30	Oct 17	Oct 31	Nov 13
Hard freeze, 28°F	Feb 27	Mar 15	Apr 8	Oct 27	Nov 10	Nov 24

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 Salt Lake City International Airport (USW00024127) sits 6.6 miles from the center of West Valley City at 4,225 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 West Valley City, UT?

The average last frost date in West Valley City is April 8, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 30.

When is the first frost in West Valley City?

The first frost in fall usually comes around October 31. One year in ten it arrives before October 17.

How long is the growing season in West Valley City?

About 204 days between the average last and first frost.

When should I plant tomatoes in West Valley City?

Plant tomato seedlings outside from April 15 to April 29. Start seeds indoors six to eight weeks earlier.

Nearby in Utah

All 47 cities in Utah