Irmo, SC Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Irmo, a town in Lexington County, South Carolina.
Today
87°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 2pm, then showers and thunderstorms likely between 2pm and 5pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 87. East wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Irmo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Chance Showers And Thunderstorms | 5 mph E | 72% |
| Tonight | 70°F | Showers And Thunderstorms Likely | 3 mph E | 66% |
| Wednesday | 88°F | Chance Showers And Thunderstorms | 1 to 7 mph S | 60% |
| Wednesday Night | 72°F | Showers And Thunderstorms Likely | 5 mph S | 58% |
| Thursday | 90°F | Mostly Sunny then Showers And Thunderstorms Likely | 2 to 6 mph S | 58% |
| Thursday Night | 72°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 58% |
| Friday | 91°F | Chance Showers And Thunderstorms | 0 to 6 mph S | 31% |
| Friday Night | 72°F | Chance Showers And Thunderstorms | 1 to 6 mph S | 31% |
| Saturday | 92°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 1 to 6 mph S | 21% |
| Saturday Night | 73°F | Slight Chance Showers And Thunderstorms | 1 to 6 mph S | 21% |
| Sunday | 92°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 1 to 5 mph SW | 37% |
| Sunday Night | 74°F | Chance Showers And Thunderstorms | 3 mph SW | 37% |
| Monday | 93°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 6 mph SW | 30% |
| Monday Night | 74°F | Chance Showers And Thunderstorms | 3 mph SW | 30% |
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
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Chapin
Edmund
Fairview Crossroads
Gaston
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Lexington
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Red Bank
South Congaree
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Summit
Swansea
West Columbia
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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 Aug 4, 2026.