Blenheim, SC Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Blenheim, a town in Marlboro County, South Carolina.
Today
84°F
Patchy Fog then Chance Showers And Thunderstorms
Patchy fog and a chance of showers and thunderstorms before 11am, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 84. East wind 1 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Blenheim
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Patchy Fog then Chance Showers And Thunderstorms | 1 to 5 mph E | 49% |
| Tonight | 72°F | Chance Showers And Thunderstorms then Patchy Fog | 1 to 5 mph SE | 51% |
| Wednesday | 87°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 2 to 8 mph S | 44% |
| Wednesday Night | 72°F | Chance Showers And Thunderstorms | 2 to 7 mph S | 36% |
| Thursday | 90°F | Slight Chance Showers And Thunderstorms | 1 to 8 mph S | 64% |
| Thursday Night | 72°F | Slight Chance Showers And Thunderstorms | 1 to 5 mph S | 17% |
| Friday | 91°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 6 mph S | 26% |
| Friday Night | 71°F | Partly Cloudy | 0 to 5 mph S | 6% |
| Saturday | 90°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 7 mph S | 29% |
| Saturday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 6 mph S | 29% |
| Sunday | 91°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 1 to 5 mph SW | 39% |
| Sunday Night | 73°F | Chance Showers And Thunderstorms | 5 mph SW | 39% |
| Monday | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 6 mph SW | 27% |
| Monday Night | 73°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 27% |
Forecast source: National Weather Service (api.weather.gov) for Blenheim (34.510, -79.652). Updated through the day.
Growing snapshot for Blenheim
Last spring frost
Mar 22
First fall frost
Nov 10
Growing season
235 days
Hardiness zone
8b
More local growing data for Blenheim: nearby ZIP 29516 weather · frost dates · planting calendar · South Carolina frost dates
Nearby towns & communities
All South Carolina locations ›
Climate data from the nearest NOAA station, Florence 8 Ne, Sc (12.6 mi from Blenheim). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.