Last frost date in Grants Pass, OR
Expect the last frost in Grants Pass around April 8. Frost after May 1 happens in only one year out of ten. The first fall frost usually arrives about October 28, which leaves 201 frost-free days. An early freeze before October 8 happens one year in ten.
- Safe after (10% risk)
- May 1
- Average first frost
- Oct 28
- Frost-free season
- 201 days
- Hard freeze (28°F) ends
- Mar 8
Frost likely Fri night, low 30°F
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2236°possible frost
- FriOct 2330°frost
- SatOct 2436°possible frost
- SunOct 2536°possible frost
- MonOct 2636°possible frost
- TueOct 2735°possible frost
Planting calendar for Grants Pass
Windows count forward or back from the average frost dates above. Click a crop for dates across Oregon.
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
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
Tulip bulbsOct 14–Nov 18
GarlicOct 7–Nov 11
Daffodil bulbsSep 30–Nov 11
StrawberriesMar 11–Mar 25
AsparagusMar 11–Mar 25Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Mar 15 | Apr 8 | May 1 | Oct 8 | Oct 28 | Nov 24 |
| Hard freeze, 28°F | Jan 19 | Mar 8 | Apr 5 | Oct 22 | Nov 16 | Dec 27 |
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 Grants Pass (USC00353445) sits 0.8 miles from the center of Grants Pass at 932 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 Grants Pass, OR?
The average last frost date in Grants Pass is April 8, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 1.
When is the first frost in Grants Pass?
The first frost in fall usually comes around October 28. One year in ten it arrives before October 8.
How long is the growing season in Grants Pass?
About 201 days between the average last and first frost.
When should I plant tomatoes in Grants Pass?
Plant tomato seedlings outside from April 15 to April 29. Start seeds indoors six to eight weeks earlier.