Last frost date in Roseburg, OR
Expect the last frost in Roseburg around March 23. Frost after April 16 happens in only one year out of ten. The first fall frost usually arrives about November 18, which leaves 237 frost-free days. An early freeze before October 24 happens one year in ten.
- Safe after (10% risk)
- Apr 16
- Average first frost
- Nov 18
- Frost-free season
- 237 days
- Hard freeze (28°F) ends
- Feb 20
Frost possible in low spots Fri night, low 35°F
Earlier than usual: the average first frost here is November 18.
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2240°
- FriOct 2335°possible frost
- SatOct 2440°
- SunOct 2541°
- MonOct 2640°
- TueOct 2740°
Planting calendar for Roseburg
Windows count forward or back from the average frost dates above. Click a crop for dates across Oregon.
TomatoesMar 30–Apr 13
PumpkinsApr 6–Apr 20
SunflowersMar 23–Apr 13
CucumbersApr 6–Apr 13
CornMar 30–Apr 13
Sweet potatoesApr 13–Apr 27
WatermelonApr 6–Apr 20
Green beansMar 30–Apr 20
ZucchiniMar 30–Apr 13
OkraApr 13–Apr 27
PeppersApr 6–Apr 20
BasilMar 30–Apr 13
Butternut squashMar 30–Apr 13
CantaloupeApr 6–Apr 20
EggplantApr 6–Apr 20
PotatoesFeb 23–Mar 9
OnionsFeb 9–Mar 2
CarrotsMar 2–Apr 6
LettuceMar 9–Mar 30
BroccoliFeb 23–Mar 9
BeetsFeb 23–Apr 6
PeasFeb 9–Feb 23
CabbageFeb 23–Mar 9
RadishesFeb 16–Mar 30
Brussels sproutsMar 9–Mar 23
SpinachFeb 9–Mar 2
CilantroMar 9–Mar 30
KaleFeb 23–Mar 9
Collard greensFeb 23–Mar 9
TurnipsFeb 23–Mar 9
DillMar 23–Apr 6
CeleryMar 30–Apr 6
CauliflowerMar 9–Mar 23
LeeksMar 9–Mar 23
Swiss chardMar 9–Apr 6
ParsleyMar 9–Mar 30
Tulip bulbsNov 4–Dec 9
GarlicOct 15–Nov 30
Daffodil bulbsOct 15–Nov 30
StrawberriesFeb 23–Mar 9
AsparagusFeb 23–Mar 9Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Feb 25 | Mar 23 | Apr 16 | Oct 24 | Nov 18 | Dec 17 |
| Hard freeze, 28°F | Dec 31 | Feb 20 | Mar 21 | Nov 8 | Dec 11 | Jan 31 |
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 Roseburg Kqen (USC00357331) sits 1.0 miles from the center of Roseburg at 425 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 Roseburg, OR?
The average last frost date in Roseburg is March 23, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 16.
When is the first frost in Roseburg?
The first frost in fall usually comes around November 18. One year in ten it arrives before October 24.
How long is the growing season in Roseburg?
About 237 days between the average last and first frost.
When should I plant tomatoes in Roseburg?
Plant tomato seedlings outside from March 30 to April 13. Start seeds indoors six to eight weeks earlier.
Nearby in Oregon
- Grants PassApr 8
- EugeneApr 11
- SpringfieldApr 11
- MedfordApr 8
- AshlandMay 6
- LebanonMar 14
- CorvallisApr 17
- AlbanyApr 17
- Klamath FallsJun 9
- BendJun 6
- SalemApr 3
- HayesvilleApr 3