St. Charles, Kentucky Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
St. Charles weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast10%—90°67°—
- SundayJul 5Heavy Rain34%0.57″88°71°-2°
- MondayJul 6Overcast14%—83°69°-5°
- TuesdayJul 7Overcast11%—81°65°-2°
- WednesdayJul 8Clear11%—87°63°+6°
- ThursdayJul 9Partly Cloudy21%—92°67°+5°
- FridayJul 10Light Drizzle49%—92°74°0°
AQI 71 (Moderate), driven by PM2.5. AQI up 18 in the last 6 hours — air quality is degrading. PM2.5 at 10.4 µg/m³ (AQI 53) with a 0.90 fine-to-coarse ratio and 6 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 47 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 47
- UV peak
- 0.6 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 47
PM × Wind × Precip
PM2.5 at 10.4 µg/m³ (AQI 53) with a 0.90 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.90
- Wind
- light
- 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
- 10:41 PM
- Moonset
- 9:59 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
St. Charles at a glance
- Today vs. normal: 15°F above the seasonal normal for this latitude
- Last frost: March 30 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — St. Charles
- Sat90°67°10%
- Sun88°71°34%
- Mon83°69°14%
- Tue81°65°11%
- Wed87°63°11%
- Thu92°67°21%
- Fri92°74°49%
- Sat86°70°42%
- Sun77°61°24%
- Mon78°57°10%
- Tue80°60°7%
- Wed83°60°23%
- Thu85°66°39%
- Fri90°68°42%
- Sat77°68°42%
- Sun76°68°40%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 4, 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 includes St. Charles 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 St. Charles
- 42442
- 42453