Last frost date in Bellingham, WA

Average last frost
April 1

In Bellingham, the last spring frost comes around April 1 in an average year. Wait until April 24 if you want 90% odds of no more frost. The first fall frost usually arrives about November 2, which leaves 216 frost-free days. An early freeze before October 15 happens one year in ten.

Safe after (10% risk)
Apr 24
Average first frost
Nov 2
Frost-free season
216 days
Hard freeze (28°F) ends
Mar 6
Next 6 nights in Bellingham

No frost in the next 6 nights

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

  1. ThuOct 2241°
  2. FriOct 2339°
  3. SatOct 2441°
  4. SunOct 2541°
  5. MonOct 2641°
  6. TueOct 2740°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Apr 1First frost Nov 2216 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND216 frost-free days
Frost risk through the year at Bellingham 3 SSW, 3.1 miles from Bellingham.

Planting calendar for Bellingham

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 8–Apr 22
PumpkinsApr 15–Apr 29
SunflowersApr 1–Apr 22
CucumbersApr 15–Apr 22
CornApr 8–Apr 22
Sweet potatoesApr 22–May 6
WatermelonApr 15–Apr 29
Green beansApr 8–Apr 29
ZucchiniApr 8–Apr 22
OkraApr 22–May 6
PeppersApr 15–Apr 29
BasilApr 8–Apr 22
Butternut squashApr 8–Apr 22
CantaloupeApr 15–Apr 29
EggplantApr 15–Apr 29
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesMar 4–Mar 18
OnionsFeb 18–Mar 11
CarrotsMar 11–Apr 15
LettuceMar 18–Apr 8
BroccoliMar 4–Mar 18
BeetsMar 4–Apr 15
PeasFeb 18–Mar 4
CabbageMar 4–Mar 18
RadishesFeb 25–Apr 8
Brussels sproutsMar 18–Apr 1
SpinachFeb 18–Mar 11
CilantroMar 18–Apr 8
KaleMar 4–Mar 18
Collard greensMar 4–Mar 18
TurnipsMar 4–Mar 18
DillApr 1–Apr 15
CeleryApr 8–Apr 15
CauliflowerMar 18–Apr 1
LeeksMar 18–Apr 1
Swiss chardMar 18–Apr 15
ParsleyMar 18–Apr 8
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsOct 19–Nov 23
GarlicOct 12–Nov 16
Daffodil bulbsOct 5–Nov 16
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesMar 4–Mar 18
AsparagusMar 4–Mar 18

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FMar 11Apr 1Apr 24Oct 15Nov 2Nov 23
Hard freeze, 28°FFeb 11Mar 6Mar 27Nov 1Nov 21Dec 16

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 Bellingham 3 SSW (USC00450587) sits 3.1 miles from the center of Bellingham at 15 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 Bellingham, WA?

The average last frost date in Bellingham is April 1, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 24.

When is the first frost in Bellingham?

The first frost in fall usually comes around November 2. One year in ten it arrives before October 15.

How long is the growing season in Bellingham?

About 216 days between the average last and first frost.

When should I plant tomatoes in Bellingham?

Plant tomato seedlings outside from April 8 to April 22. Start seeds indoors six to eight weeks earlier.

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