Irwin, South Carolina Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Irwin weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast26%—98°74°—
- MondayJul 6Light Rain41%0.06″97°75°-1°
- TuesdayJul 7Light Drizzle37%—96°71°-1°
- WednesdayJul 8Drizzle18%—98°71°+2°
- ThursdayJul 9Light Drizzle——98°70°0°
- FridayJul 10Partly Cloudy12%—104°75°+6°
- SaturdayJul 11Light Drizzle43%—102°76°-2°
AQI 32 (Good), driven by PM2.5. AQI down 11 over the last 6 hours (gradual decline). PM2.5 at 5.6 µg/m³ (AQI 31) with a 0.84 fine-to-coarse ratio and 3 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.
What's driving it
PM × Wind × Precip
PM2.5 at 5.6 µg/m³ (AQI 31) with a 0.84 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.84
- 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
- 11:37 PM
- Moonset
- 11:35 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Irwin at a glance
- Today vs. normal: 3°F below the seasonal normal for this latitude
- Last frost: March 15 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
15-Day Forecast — Irwin
- Sun98°74°26%
- Mon97°75°41%
- Tue96°71°37%
- Wed98°71°18%
- Thu98°70°9%
- Fri104°75°12%
- Sat102°76°43%
- Sun100°73°40%
- Mon86°72°27%
- Tue92°66°13%
- Wed96°70°13%
- Thu92°69°50%
- Fri83°70°42%
- Sat90°69°48%
- Sun94°71°36%
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 — Irwin
SPC has placed Irwin 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 Irwin
- 29720