Joanna, South Carolina Weather
Thunderheads boil and break at dusk. Day 16 of summer. Read this microseason across nine climate regions →
Joanna weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 6Light Drizzle17%0.01″95°72°—
- TuesdayJul 7Overcast12%—95°75°0°
- WednesdayJul 8Overcast11%—101°74°+6°
- ThursdayJul 9Light Drizzle——98°74°-3°
- FridayJul 10Overcast——99°75°+1°
- SaturdayJul 11Overcast26%—99°74°0°
- SundayJul 12Overcast40%—102°74°+3°
AQI 53 (Moderate), driven by PM2.5. AQI down 12 over the last 6 hours (gradual decline). PM2.5 at 9.5 µg/m³ (AQI 52) with a 0.98 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in stagnant 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
Ozone × UV × Sky
Ozone at AQI 36. Overcast through the UV peak window (cloud cover ~87%) — afternoon ozone should stay flat.
- Present
- AQI 36
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 4
PM × Wind × Precip
PM2.5 at 9.5 µg/m³ (AQI 52) with a 0.98 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.98
- 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).
When the stars begin to huddle, the earth will soon become a puddle.
- Moonrise
- 12:07 AM
- Moonset
- 12:43 PM
- In sign
- ♓︎ Pisces
Thunderheads boil and break at dusk
Joanna at a glance
- Today vs. normal: 5°F below the seasonal normal for this latitude
- Last frost: March 13 (climatological average for this latitude)
- Microseason: Jul 6–10
- Planting window: Sow fall broccoli and cabbage indoors for transplant in 4 weeks.
ZIP code: 29351
15-Day Forecast — Joanna
- Mon96°72°17%
- Tue95°75°12%
- Wed101°74°11%
- Thu98°74°5%
- Fri99°75°5%
- Sat99°74°26%
- Sun102°74°40%
- Mon103°79°40%
- Tue106°78°15%
- Wed107°77°16%
- Thu110°83°16%
- Fri96°69°50%
- Sat97°73°61%
- Sun94°69°58%
- Mon92°68°42%
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 — Joanna
SPC includes Joanna in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
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 Joanna
- 29351