Irmo, South Carolina Weather
Thunderheads boil and break at dusk. Day 16 of summer. Read this microseason across nine climate regions →
Irmo weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 6Overcast16%—98°73°—
- TuesdayJul 7Showers19%0.51″97°78°-1°
- WednesdayJul 8Light Drizzle25%—101°77°+4°
- ThursdayJul 9Overcast17%—99°75°-2°
- FridayJul 10Overcast——103°76°+4°
- SaturdayJul 11Partly Cloudy30%—101°75°-2°
- SundayJul 12Drizzle45%0.02″97°75°-4°
AQI 56 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 8.7 µg/m³, PM10 at 10.3 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 48 now. With UV 5.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 38.
- Present
- AQI 48
- UV peak
- 5.9 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 38
PM × Wind × Precip
PM2.5 at 8.7 µg/m³, PM10 at 10.3 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.84
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
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).
When the stars begin to huddle, the earth will soon become a puddle.
- Moonrise
- 12:05 AM
- Moonset
- 12:41 PM
- In sign
- ♈︎ Aries
Thunderheads boil and break at dusk
Irmo at a glance
- Today vs. normal: 15°F above the seasonal normal for this latitude
- Last frost: March 12 (climatological average for this latitude)
- Microseason: Jul 6–10
- Planting window: Sow fall broccoli and cabbage indoors for transplant in 4 weeks.
ZIP code: 29063
16-Day Forecast — Irmo
- Mon98°73°16%
- Tue97°78°19%
- Wed101°77°25%
- Thu99°75°17%
- Fri103°76°9%
- Sat101°75°30%
- Sun97°75°45%
- Mon96°70°36%
- Tue96°69°13%
- Wed101°72°10%
- Thu90°71°20%
- Fri89°69°37%
- Sat80°70°42%
- Sun92°68°44%
- Mon91°69°55%
- Tue93°70°48%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 6, 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