Williston, SC Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williston, a town in Barnwell County, South Carolina.
Today
89°F
Areas Of Fog then Chance Showers And Thunderstorms
Areas of fog before 10am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 89. Heat index values as high as 100. Southeast wind 0 to 3 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Williston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Areas Of Fog then Chance Showers And Thunderstorms | 0 to 3 mph SE | 31% |
| Tonight | 70°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 3 mph SE | 42% |
| Wednesday | 90°F | Patchy Fog then Chance Showers And Thunderstorms | 1 to 6 mph SE | 29% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms | 5 mph S | 47% |
| Thursday | 91°F | Mostly Sunny then Showers And Thunderstorms Likely | 1 to 5 mph S | 59% |
| Thursday Night | 70°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph S | 59% |
| Friday | 92°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 37% |
| Friday Night | 70°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 3 mph SE | 37% |
| Saturday | 91°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 3 mph E | 35% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 3 mph SE | 35% |
| Sunday | 92°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 2 mph SW | 39% |
| Sunday Night | 72°F | Chance Showers And Thunderstorms | 2 mph S | 39% |
| Monday | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 mph SW | 31% |
| Monday Night | 72°F | Chance Showers And Thunderstorms | 2 mph SW | 31% |
Forecast source: National Weather Service (api.weather.gov) for Williston (33.402, -81.422). Updated through the day.
Growing snapshot for Williston
Last spring frost
Mar 20
First fall frost
Nov 13
Growing season
238 days
Hardiness zone
8b
More local growing data for Williston: nearby ZIP 29853 weather · frost dates · planting calendar · South Carolina frost dates
Nearby towns & communities
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Climate data from the nearest NOAA station, Blackville 3 W, Sc (6.7 mi from Williston). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.