Helena, South Carolina Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Helena weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Light Drizzle24%0.01″95°74°—
- MondayJul 6Overcast42%—95°77°0°
- TuesdayJul 7Overcast22%—97°71°+2°
- WednesdayJul 8Drizzle10%—97°71°0°
- ThursdayJul 9Overcast——99°70°+2°
- FridayJul 10Overcast15%—101°74°+2°
- SaturdayJul 11Light Drizzle31%—101°76°0°
AQI 48 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 12.5 µg/m³ (AQI 57) with a 0.95 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
Ozone × UV × Sky
Ozone at AQI 33. Overcast through the UV peak window (cloud cover ~66%) — afternoon ozone should stay flat.
- Present
- AQI 33
- UV peak
- 0.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 4
PM × Wind × Precip
PM2.5 at 12.5 µg/m³ (AQI 57) with a 0.95 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.95
- 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
- 11:40 PM
- Moonset
- 11:39 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Helena at a glance
- Today vs. normal: 3°F below the seasonal normal for this latitude
- Last frost: March 13 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
15-Day Forecast — Helena
- Sun95°74°24%
- Mon95°77°42%
- Tue97°71°22%
- Wed97°71°10%
- Thu99°70°5%
- Fri101°74°15%
- Sat101°76°31%
- Sun100°72°35%
- Mon90°71°30%
- Tue94°66°16%
- Wed94°70°18%
- Thu90°70°50%
- Fri75°69°39%
- Sat90°69°55%
- Sun92°69°34%
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 — Helena
SPC has placed Helena 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 Helena
- 29108