Irmo, SC Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Irmo, a town in Lexington County, South Carolina.
This Afternoon
96°F
Sunny
Sunny, with a high near 96. Heat index values as high as 101. Southwest wind around 2 mph.
7-day forecast for Irmo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 96°F | Sunny | 2 mph SW | 8% |
| Tonight | 73°F | Chance Showers And Thunderstorms | 2 mph NW | 38% |
| Saturday | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 1 to 6 mph NE | 29% |
| Saturday Night | 72°F | Chance Showers And Thunderstorms | 1 to 6 mph E | 29% |
| Sunday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 mph NE | 22% |
| Sunday Night | 72°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 2 mph SE | 22% |
| Monday | 92°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 3 mph S | 47% |
| Monday Night | 71°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 mph E | 60% |
| Tuesday | 87°F | Showers And Thunderstorms Likely | 1 to 8 mph NE | 61% |
| Tuesday Night | 69°F | Showers And Thunderstorms Likely | 5 to 9 mph NE | 61% |
| Wednesday | 82°F | Partly Sunny then Chance Showers And Thunderstorms | 12 mph NE | 33% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 7 to 12 mph NE | 33% |
| Thursday | 81°F | Partly Sunny | 10 mph NE | 8% |
| Thursday Night | 64°F | Partly Cloudy | 5 to 9 mph NE | 8% |
Forecast source: National Weather Service (api.weather.gov) for Irmo (34.102, -81.196). Updated through the day.
Growing snapshot for Irmo
Last spring frost
Mar 25
First fall frost
Nov 7
Growing season
229 days
Hardiness zone
8b
More local growing data for Irmo: nearby ZIP 29212 weather · frost dates · planting calendar · South Carolina frost dates
Nearby towns & communities
Cayce
Chapin
Edmund
Fairview Crossroads
Gaston
Gilbert
Lexington
Oak Grove
Pelion
Pine Ridge
Red Bank
South Congaree
Springdale
Summit
Swansea
West Columbia
White Knoll
All South Carolina locations ›
Climate data from the nearest NOAA station, Columbia, Sc (10.1 mi from Irmo). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.