St. Charles, Iowa Weather
Warm wind sweeps the tallgrass. Day 16 of summer. Read this microseason across nine climate regions →
St. Charles weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Light Drizzle34%0.03″86°70°—
- MondayJul 6Overcast——88°67°+2°
- TuesdayJul 7Overcast——91°68°+3°
- WednesdayJul 8Overcast26%—85°66°-6°
- ThursdayJul 9Showers53%0.05″83°67°-2°
- FridayJul 10Heavy Drizzle38%0.07″79°67°-4°
- SaturdayJul 11Heavy Drizzle16%0.09″84°68°+5°
AQI 41 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±4 points). PM2.5 at 7.8 µg/m³ (AQI 43) with a 0.90 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
PM × Wind × Precip
PM2.5 at 7.8 µg/m³ (AQI 43) with a 0.90 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.90
- 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
- 11:56 PM
- Moonset
- 12:36 PM
- In sign
- ♓︎ Pisces
Warm wind sweeps the tallgrass
St. Charles at a glance
- Today vs. normal: 4°F above the seasonal normal for this latitude
- Last frost: April 24 (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
- Sun86°70°34%
- Mon88°67°1%
- Tue91°68°1%
- Wed85°66°26%
- Thu83°67°53%
- Fri79°67°38%
- Sat84°68°16%
- Sun88°68°4%
- Mon95°70°3%
- Tue84°70°8%
- Wed80°62°9%
- Thu77°64°18%
- Fri77°65°23%
- Sat81°62°16%
- Sun80°63°16%
- Mon87°65°17%
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.
ZIP codes in St. Charles
- 50240