Irmo, South Carolina Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Irmo weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Showers18%0.24″96°77°—
- MondayJul 6Showers36%0.17″97°77°+1°
- TuesdayJul 7Overcast36%—96°73°-1°
- WednesdayJul 8Overcast20%—99°73°+3°
- ThursdayJul 9Mostly Clear10%—100°72°+1°
- FridayJul 10Mostly Clear11%—102°76°+2°
- SaturdayJul 11Overcast32%—103°77°+1°
AQI 34 (Good), driven by PM2.5. AQI down 9 over the last 6 hours (gradual decline). PM2.5 at 8.9 µg/m³ (AQI 49) with a 0.89 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 5 PM.
What's driving it
PM × Wind × Precip
PM2.5 at 8.9 µg/m³ (AQI 49) with a 0.89 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.89
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:38 PM
- Moonset
- 11:37 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Irmo at a glance
- Today vs. normal: 77°F — typical for the season
- Last frost: March 12 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 29063
15-Day Forecast — Irmo
- Sun96°77°18%
- Mon97°77°36%
- Tue96°73°36%
- Wed99°73°20%
- Thu100°72°10%
- Fri102°76°11%
- Sat103°77°32%
- Sun100°74°41%
- Mon82°71°32%
- Tue94°69°21%
- Wed95°69°16%
- Thu93°70°44%
- Fri84°71°45%
- Sat88°71°52%
- Sun94°70°40%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Irmo
SPC has placed Irmo in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Irmo
- 29212
- 29063