Last frost date in Arlington, WA

Average last frost

April 22

In Arlington, the last spring frost comes around April 22 in an average year. Wait until May 6 if you want 90% odds of no more frost. The first fall frost usually arrives about October 19, which leaves 181 frost-free days. An early freeze before October 3 happens one year in ten.

Safe after (10% risk): May 6
Average first frost: Oct 19
Frost-free season: 181 days
Hard freeze (28°F) ends: Mar 25

Next 6 nights in Arlington

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

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

ThuOct 2237°
FriOct 2334°possible frost
SatOct 2437°
SunOct 2538°
MonOct 2637°
TueOct 2736°possible frost

Frost risk through the year at Arlington, 2.2 miles from Arlington.

Planting calendar for Arlington

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

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost

Warm-season crops

JanFebMarAprMayJunJulAugSepOctNovDec

TomatoesApr 29–May 13

PumpkinsMay 6–May 20

SunflowersApr 22–May 13

CucumbersMay 6–May 13

CornApr 29–May 13

Sweet potatoesMay 13–May 27

WatermelonMay 6–May 20

Green beansApr 29–May 20

ZucchiniApr 29–May 13

OkraMay 13–May 27

PeppersMay 6–May 20

BasilApr 29–May 13

Butternut squashApr 29–May 13

CantaloupeMay 6–May 20

EggplantMay 6–May 20

Cool-season crops

JanFebMarAprMayJunJulAugSepOctNovDec

PotatoesMar 25–Apr 8

OnionsMar 11–Apr 1

CarrotsApr 1–May 6

LettuceApr 8–Apr 29

BroccoliMar 25–Apr 8

BeetsMar 25–May 6

PeasMar 11–Mar 25

CabbageMar 25–Apr 8

RadishesMar 18–Apr 29

Brussels sproutsApr 8–Apr 22

SpinachMar 11–Apr 1

CilantroApr 8–Apr 29

KaleMar 25–Apr 8

Collard greensMar 25–Apr 8

TurnipsMar 25–Apr 8

DillApr 22–May 6

CeleryApr 29–May 6

CauliflowerApr 8–Apr 22

LeeksApr 8–Apr 22

Swiss chardApr 8–May 6

ParsleyApr 8–Apr 29

Fall bulbs and garlic

JanFebMarAprMayJunJulAugSepOctNovDec

Tulip bulbsOct 5–Nov 9

GarlicSep 28–Nov 2

Daffodil bulbsSep 21–Nov 2

Perennials

JanFebMarAprMayJunJulAugSepOctNovDec

StrawberriesMar 25–Apr 8

AsparagusMar 25–Apr 8

Frost probabilities

Threshold	Spring, 90% chance later	Spring, 50%	Spring, 10%	Fall, 10% chance earlier	Fall, 50%	Fall, 90%
Light frost, 32°F	Apr 4	Apr 22	May 6	Oct 3	Oct 19	Nov 4
Hard freeze, 28°F	Mar 3	Mar 25	Apr 15	Oct 19	Nov 3	Nov 23

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 Arlington (USC00450257) sits 2.2 miles from the center of Arlington at 100 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 Arlington, WA?

The average last frost date in Arlington is April 22, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 6.

When is the first frost in Arlington?

The first frost in fall usually comes around October 19. One year in ten it arrives before October 3.

How long is the growing season in Arlington?

About 181 days between the average last and first frost.

When should I plant tomatoes in Arlington?

Plant tomato seedlings outside from April 29 to May 13. Start seeds indoors six to eight weeks earlier.

Nearby in Washington

All 76 cities in Washington