Last frost date in Sherwood, OR

Average last frost
March 21

In Sherwood, the last spring frost comes around March 21 in an average year. Wait until April 19 if you want 90% odds of no more frost. The first fall frost usually arrives about November 22, which leaves 241 frost-free days. An early freeze before November 4 happens one year in ten.

Safe after (10% risk)
Apr 19
Average first frost
Nov 22
Frost-free season
241 days
Hard freeze (28°F) ends
Feb 15
Next 6 nights in Sherwood

No frost in the next 6 nights

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

  1. ThuOct 2239°
  2. FriOct 2337°
  3. SatOct 2440°
  4. SunOct 2542°
  5. MonOct 2641°
  6. TueOct 2741°
JanFebMarAprMayJunJulAugSepOctNovDecLast frost Mar 21First frost Nov 22241 frost-free daysBlue: chance of 32°F frost. Green: average frost-free season.JFMAMJJASOND241 frost-free days
Frost risk through the year at Rex 1 S, 5.2 miles from Sherwood.

Planting calendar for Sherwood

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

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
Warm-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
TomatoesMar 28–Apr 11
PumpkinsApr 4–Apr 18
SunflowersMar 21–Apr 11
CucumbersApr 4–Apr 11
CornMar 28–Apr 11
Sweet potatoesApr 11–Apr 25
WatermelonApr 4–Apr 18
Green beansMar 28–Apr 18
ZucchiniMar 28–Apr 11
OkraApr 11–Apr 25
PeppersApr 4–Apr 18
BasilMar 28–Apr 11
Butternut squashMar 28–Apr 11
CantaloupeApr 4–Apr 18
EggplantApr 4–Apr 18
Cool-season crops
JanFebMarAprMayJunJulAugSepOctNovDec
PotatoesFeb 21–Mar 7
OnionsFeb 7–Feb 28
CarrotsFeb 28–Apr 4
LettuceMar 7–Mar 28
BroccoliFeb 21–Mar 7
BeetsFeb 21–Apr 4
PeasFeb 7–Feb 21
CabbageFeb 21–Mar 7
RadishesFeb 14–Mar 28
Brussels sproutsMar 7–Mar 21
SpinachFeb 7–Feb 28
CilantroMar 7–Mar 28
KaleFeb 21–Mar 7
Collard greensFeb 21–Mar 7
TurnipsFeb 21–Mar 7
DillMar 21–Apr 4
CeleryMar 28–Apr 4
CauliflowerMar 7–Mar 21
LeeksMar 7–Mar 21
Swiss chardMar 7–Apr 4
ParsleyMar 7–Mar 28
Fall bulbs and garlic
JanFebMarAprMayJunJulAugSepOctNovDec
Tulip bulbsNov 8–Dec 13
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
Perennials
JanFebMarAprMayJunJulAugSepOctNovDec
StrawberriesFeb 21–Mar 7
AsparagusFeb 21–Mar 7

Frost probabilities

ThresholdSpring, 90% chance laterSpring, 50%Spring, 10%Fall, 10% chance earlierFall, 50%Fall, 90%
Light frost, 32°FFeb 23Mar 21Apr 19Nov 4Nov 22Dec 12
Hard freeze, 28°FJan 3Feb 15Mar 11Nov 15Dec 10Jan 12

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 Rex 1 S (USC00357127) sits 5.2 miles from the center of Sherwood at 515 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 Sherwood, OR?

The average last frost date in Sherwood is March 21, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 19.

When is the first frost in Sherwood?

The first frost in fall usually comes around November 22. One year in ten it arrives before November 4.

How long is the growing season in Sherwood?

About 241 days between the average last and first frost.

When should I plant tomatoes in Sherwood?

Plant tomato seedlings outside from March 28 to April 11. Start seeds indoors six to eight weeks earlier.

Nearby in Oregon

All 34 cities in Oregon