Harman US

St. Stephen, SC Weather & Growing Conditions

This Afternoon
90°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly sunny, with a high near 90. Northeast wind around 2 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 90°F Chance Showers And Thunderstorms 2 mph NE 53%
Tonight 70°F Chance Showers And Thunderstorms 2 mph E 42%
Sunday 88°F Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms 2 mph NE 22%
Sunday Night 70°F Partly Cloudy 1 mph NE 14%
Monday 91°F Mostly Sunny then Chance Showers And Thunderstorms 2 mph E 32%
Monday Night 70°F Chance Showers And Thunderstorms 1 mph E 32%
Tuesday 88°F Showers And Thunderstorms Likely 0 to 3 mph NE 73%
Tuesday Night 68°F Showers And Thunderstorms Likely then Chance Showers And Thunderstorms 0 to 5 mph NE 73%
Wednesday 84°F Slight Chance Rain Showers then Chance Showers And Thunderstorms 5 to 8 mph NE 39%
Wednesday Night 65°F Chance Showers And Thunderstorms then Mostly Cloudy 7 mph NE 39%
Thursday 82°F Mostly Sunny then Slight Chance Showers And Thunderstorms 8 mph N 20%
Thursday Night 62°F Slight Chance Showers And Thunderstorms then Partly Cloudy 6 mph N 20%
Friday 81°F Sunny 6 mph N 8%
Friday Night 61°F Partly Cloudy 0 to 3 mph N 8%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for St. Stephen, SC

Last spring frost
Mar 10
First fall frost
Nov 26
Growing season
265 days
Hardiness zone
8b

Explore more for St. Stephen, SC: full frost dates · planting calendar · South Carolina frost dates

Climate data from the nearest NOAA station, Moncks Corner 4 N, Sc (11 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.