Current Conditions

Saint Charles, Missouri

75°F24°C
Drizzle

Wind

SSE 4 mph7 km/h

Humidity

88%

Cloud Cover

75%

As of Thursday, August 13, 2026 at 3:25 AM CDT

Today's Outlook

Day

Overcast and hot, with a high of 94°F34°C and morning low of 75°F24°C — feels like 104°F40°C. Light wind from the S around 5 mph8 km/h. Heat risk in the afternoon.

Night

Mostly cloudy, with a low around 75°F24°C. Breezy from the SE at 6 to 8 mph10 to 13 km/h. 13% chance of drizzle before dawn.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
DrizzleHigh 94°F34°CFeels 104°F40°CLow 75°F24°CPrecip 0.03 in0.8 mm13%Cloud 86%Wind SSE 5 mph9 km/hThursday: Overcast and hot, with a high of 94°F34°C and morning low of 75°F24°C — feels like 104°F40°C. Light wind from the S around 5 mph8 km/h. Heat risk in the afternoon. Thursday Night: Mostly cloudy, with a low around 75°F24°C. Breezy from the SE at 6 to 8 mph10 to 13 km/h. 13% chance of drizzle before dawn.
HotHigh 95°F35°CFeels 103°F40°CLow 79°F26°CPrecip 0.01 in0.3 mm9%Cloud 76%Wind SSE 6 mph9 km/hFriday: Overcast and hot, with a high of 95°F35°C and morning low of 79°F26°C — feels like 104°F40°C. Light wind from the SSE around 5 mph7 km/h. Heat risk in the afternoon. Friday Night: Mostly cloudy, with a low around 81°F27°C. Breezy from the SSE at 7 to 8 mph10 to 14 km/h.
DrizzleHigh 97°F36°CFeels 103°F40°CLow 79°F26°CPrecip 0.04 in1.1 mm17%Cloud 63%Wind S 6 mph9 km/hSaturday: Mostly cloudy and hot, with a high of 97°F36°C and morning low of 79°F26°C — feels like 104°F40°C. Light wind from the SSW around 5 mph9 km/h. 17% chance of drizzle throughout the day. Heat risk in the afternoon. Saturday Night: Partly cloudy, with a low around 81°F27°C. Breezy from the SSE at 6 to 7 mph9 to 12 km/h. 11% chance of drizzle overnight.
ShowersHigh 96°F36°CFeels 105°F41°CLow 80°F27°CPrecip 0.04 in1 mm25%Cloud 48%Wind W 7 mph11 km/hSunday: Mostly cloudy and hot, with a high of 96°F36°C and morning low of 80°F27°C — feels like 106°F41°C. Breezy from the W at 7 mph11 km/h. 14% chance of drizzle in the afternoon. Heat risk in the afternoon. Sunday Night: Partly cloudy, with a low around 81°F27°C. Breezy from the W at 7 mph11 km/h. 25% chance of showers in the evening.
DrizzleHigh 87°F30°CLow 73°F23°CPrecip 0.04 in1 mm13%Cloud 55%Wind NNW 6 mph9 km/hMonday: Mostly cloudy and hot, with a high of 87°F30°C and morning low of 73°F23°C. Light wind from the NNW around 6 mph10 km/h. Humid. Monday Night: Partly cloudy, with a low around 75°F24°C. Light wind from the N around 5 mph9 km/h. 13% chance of drizzle overnight.
ClearHigh 91°F33°CFeels 94°F35°CLow 70°F21°CPrecip 0.03 in0.7 mm5%Cloud 22%Wind ESE 4 mph7 km/hTuesday: Mostly clear and hot, with a high of 91°F33°C and morning low of 70°F21°C. Light wind from the SE around 4 mph6 km/h. Humid. Tuesday Night: Mostly clear, with a low around 71°F22°C. Breezy from the ESE at 5 to 7 mph8 to 12 km/h.
DrizzleHigh 96°F36°CFeels 101°F38°CLow 77°F25°CPrecip 0.04 in0.9 mm14%Cloud 51%Wind SSW 8 mph12 km/hWednesday: Mostly cloudy and hot, with a high of 96°F36°C and morning low of 77°F25°C. Breezy from the SW at 8 mph12 km/h. Heat risk in the afternoon. Wednesday Night: Partly cloudy, with a low around 78°F25°C. Breezy from the SSE at 7 to 9 mph12 to 14 km/h. 14% chance of drizzle throughout the night.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
ThursdayAug 1394°F34°C
Feels 104°F40°C
75°F24°C0.03 in0.8 mm· 13%86%DrizzleSSE 5 mph9 km/h
FridayAug 1495°F35°C
Feels 103°F40°C
79°F26°C0.01 in0.3 mm· 9%76%HotSSE 6 mph9 km/h
SaturdayAug 1597°F36°C
Feels 103°F40°C
79°F26°C0.04 in1.1 mm· 17%63%DrizzleS 6 mph9 km/h
SundayAug 1696°F36°C
Feels 105°F41°C
80°F27°C0.04 in1 mm· 25%48%ShowersW 7 mph11 km/h
MondayAug 1787°F30°C73°F23°C0.04 in1 mm· 13%55%DrizzleNNW 6 mph9 km/h
TuesdayAug 1891°F33°C
Feels 94°F35°C
70°F21°C0.03 in0.7 mm· 5%22%ClearESE 4 mph7 km/h
WednesdayAug 1996°F36°C
Feels 101°F38°C
77°F25°C0.04 in0.9 mm· 14%51%DrizzleSSW 8 mph12 km/h
ThursdayAug 2088°F31°C74°F23°C0.07 in1.7 mm· 19%44%DrizzleN 6 mph10 km/h
FridayAug 2186°F30°C69°F21°C0.09 in2.2 mm· 13%42%ShowersENE 6 mph9 km/h
SaturdayAug 2287°F31°C68°F20°C0.05 in1.2 mm· 12%36%DrizzleENE 6 mph9 km/h
SundayAug 2389°F32°C68°F20°C0.03 in0.8 mm· 5%27%ClearE 6 mph9 km/h
MondayAug 2491°F33°C69°F21°C0.02 in0.5 mm· 6%31%ClearESE 5 mph9 km/h
TuesdayAug 2591°F33°C70°F21°C0.02 in0.6 mm· 6%31%ClearESE 5 mph9 km/h
WednesdayAug 2692°F33°C71°F21°C0.03 in0.7 mm· 10%37%DrizzleESE 5 mph9 km/h
ThursdayAug 2790°F32°C70°F21°C0.03 in0.8 mm· 10%44%DrizzleE 6 mph9 km/h

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

PatternExampleDescription
/weather/{country}/{city}//weather/united-states/san-francisco/City forecast (canonical URL)
/weather/{city}//weather/tokyo/Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}//weather/united-states/california/san-francisco/With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}/weather/nearby?lat=48.1&lon=11.5Find nearest city by coordinates
/weather/{country}//weather/germany/Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 38.7839°N, 90.4812°W·Elevation: 147m·Timezone: America/Chicago·Population: 65,794