Last frost date in Silver Spring, MD
In Silver Spring, the last spring frost comes around April 10 in an average year. Wait until May 1 if you want 90% odds of no more frost. The first fall frost usually arrives about November 1, which leaves 202 frost-free days. An early freeze before October 16 happens one year in ten.
- Safe after (10% risk)
- May 1
- Average first frost
- Nov 1
- Frost-free season
- 202 days
- Hard freeze (28°F) ends
- Mar 29
No frost in the next 7 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2245°
- FriOct 2338°
- SatOct 2439°
- SunOct 2541°
- MonOct 2646°
- TueOct 2747°
- WedOct 2848°
Planting calendar for Silver Spring
Windows count forward or back from the average frost dates above. Click a crop for dates across Maryland.
TomatoesApr 17–May 1
PumpkinsApr 24–May 8
SunflowersApr 10–May 1
CucumbersApr 24–May 1
CornApr 17–May 1
Sweet potatoesMay 1–May 15
WatermelonApr 24–May 8
Green beansApr 17–May 8
ZucchiniApr 17–May 1
OkraMay 1–May 15
PeppersApr 24–May 8
BasilApr 17–May 1
Butternut squashApr 17–May 1
CantaloupeApr 24–May 8
EggplantApr 24–May 8
PotatoesMar 13–Mar 27
OnionsFeb 27–Mar 20
CarrotsMar 20–Apr 24
LettuceMar 27–Apr 17
BroccoliMar 13–Mar 27
BeetsMar 13–Apr 24
PeasFeb 27–Mar 13
CabbageMar 13–Mar 27
RadishesMar 6–Apr 17
Brussels sproutsMar 27–Apr 10
SpinachFeb 27–Mar 20
CilantroMar 27–Apr 17
KaleMar 13–Mar 27
Collard greensMar 13–Mar 27
TurnipsMar 13–Mar 27
DillApr 10–Apr 24
CeleryApr 17–Apr 24
CauliflowerMar 27–Apr 10
LeeksMar 27–Apr 10
Swiss chardMar 27–Apr 24
ParsleyMar 27–Apr 17
Tulip bulbsOct 18–Nov 22
GarlicOct 11–Nov 15
Daffodil bulbsOct 4–Nov 15
StrawberriesMar 13–Mar 27
AsparagusMar 13–Mar 27Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Mar 27 | Apr 10 | May 1 | Oct 16 | Nov 1 | Nov 14 |
| Hard freeze, 28°F | Mar 12 | Mar 29 | Apr 10 | Oct 29 | Nov 11 | Nov 30 |
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 Beltsville (USC00180700) sits 5.2 miles from the center of Silver Spring at 145 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 Silver Spring, MD?
The average last frost date in Silver Spring is April 10, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after May 1.
When is the first frost in Silver Spring?
The first frost in fall usually comes around November 1. One year in ten it arrives before October 16.
How long is the growing season in Silver Spring?
About 202 days between the average last and first frost.
When should I plant tomatoes in Silver Spring?
Plant tomato seedlings outside from April 17 to May 1. Start seeds indoors six to eight weeks earlier.
Nearby in Maryland
- Langley ParkApr 10
- ChillumMar 29
- WheatonApr 1
- HyattsvilleMar 29
- College ParkApr 10
- BethesdaApr 9
- North BethesdaApr 1
- FairlandApr 5
- Aspen HillApr 1
- GreenbeltApr 10
- LandoverMar 29
- RockvilleApr 1