Smithfield, NC Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Smithfield, a town in Johnston County, North Carolina.
Overnight
70°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 1am, then patchy fog. Mostly cloudy, with a low around 70. North wind around 2 mph. Chance of precipitation is 20%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Smithfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 70°F | Slight Chance Showers And Thunderstorms | 2 mph N | 17% |
| Saturday | 84°F | Patchy Fog | 3 to 7 mph NE | 18% |
| Saturday Night | 68°F | Partly Cloudy | 0 to 6 mph E | 7% |
| Sunday | 88°F | Mostly Sunny | 1 mph E | 4% |
| Sunday Night | 70°F | Mostly Clear | 1 mph S | 4% |
| Monday | 90°F | Mostly Sunny then Showers And Thunderstorms Likely | 0 to 3 mph N | 58% |
| Monday Night | 69°F | Showers And Thunderstorms Likely | 3 mph NE | 58% |
| Tuesday | 84°F | Showers And Thunderstorms Likely | 3 to 9 mph NE | 61% |
| Tuesday Night | 66°F | Showers And Thunderstorms Likely | 6 to 10 mph NE | 61% |
| Wednesday | 78°F | Chance Rain Showers | 10 to 14 mph NE | 44% |
| Wednesday Night | 63°F | Chance Showers And Thunderstorms | 8 to 13 mph N | 44% |
| Thursday | 77°F | Chance Rain Showers | 10 to 14 mph N | 26% |
| Thursday Night | 60°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 to 13 mph N | 26% |
| Friday | 77°F | Mostly Sunny | 9 mph N | 13% |
Forecast source: National Weather Service (api.weather.gov) for Smithfield (35.524, -78.352). Updated through the day.
Growing snapshot for Smithfield
Last spring frost
Mar 29
First fall frost
Nov 5
Growing season
220 days
Hardiness zone
8a
More local growing data for Smithfield: nearby ZIP 27577 weather · frost dates · planting calendar · North Carolina frost dates
Nearby towns & communities
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Climate data from the nearest NOAA station, Smithfield, Nc (1.7 mi from Smithfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.