Smithfield, NC Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Smithfield, a town in Johnston County, North Carolina.
Today
82°F
Chance Showers And Thunderstorms
A chance of rain showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers and thunderstorms. Cloudy, with a high near 82. East wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Smithfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Chance Showers And Thunderstorms | 5 mph E | 80% |
| Tonight | 72°F | Showers And Thunderstorms Likely | 1 to 5 mph SE | 69% |
| Wednesday | 86°F | Chance Showers And Thunderstorms | 2 to 6 mph S | 47% |
| Wednesday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph S | 47% |
| Thursday | 89°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 1 to 7 mph S | 41% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 41% |
| Friday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 6 mph SW | 25% |
| Friday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph S | 25% |
| Saturday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 1 to 6 mph SW | 23% |
| Saturday Night | 71°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph SW | 23% |
| Sunday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 1 to 5 mph SW | 26% |
| Sunday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 mph SW | 26% |
| Monday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 6 mph SW | 20% |
| Monday Night | 73°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph SW | 20% |
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 Aug 4, 2026.