St. Charles, Arkansas Weather
Thunderheads boil and break at dusk. Day 16 of summer. Read this microseason across nine climate regions →
St. Charles weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——91°72°—
- MondayJul 6Light Drizzle12%0.02″94°73°+3°
- TuesdayJul 7Rain41%0.13″93°72°-1°
- WednesdayJul 8Heavy Drizzle24%—92°71°-1°
- ThursdayJul 9Clear——95°73°+3°
- FridayJul 10Partly Cloudy——96°76°+1°
- SaturdayJul 11Light Showers27%0.24″93°75°-3°
AQI 45 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 10.4 µg/m³ (AQI 53) with a 0.84 fine-to-coarse ratio and 4 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 31 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 5.
- Present
- AQI 31
- UV peak
- 0.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 5
PM × Wind × Precip
PM2.5 at 10.4 µg/m³ (AQI 53) with a 0.84 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in stagnant 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).
When the stars begin to huddle, the earth will soon become a puddle.
- Moonrise
- 11:46 PM
- Moonset
- 12:22 PM
- In sign
- ♓︎ Pisces
Thunderheads boil and break at dusk
St. Charles at a glance
- Today vs. normal: 3°F above 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.
16-Day Forecast — St. Charles
- Sun91°72°7%
- Mon94°73°12%
- Tue93°72°41%
- Wed92°71°24%
- Thu95°73°6%
- Fri96°76°5%
- Sat93°75°27%
- Sun93°72°24%
- Mon96°73°18%
- Tue92°76°3%
- Wed97°77°4%
- Thu90°70°14%
- Fri102°71°20%
- Sat94°76°20%
- Sun92°71°16%
- Mon97°71°16%
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 — St. Charles
SPC has placed St. Charles in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWMRGLMarginal Risk
- 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 St. Charles
- 72140