Current Conditions

St. Charles, Illinois

62°F16°C
Clear

Wind

SSW 8 mph13 km/h

Humidity

81%

Cloud Cover

93%

As of Monday, October 12, 2026 at 1:37 AM CDT

Today's Outlook

Night

Mostly clear, with a low around 64°F18°C. Breezy from the SSW at 6 to 7 mph10 to 12 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
ClearHigh 68°F20°CLow 64°F18°CPrecip 0 in0 mm—Cloud 6%Wind SSW 6 mph10 km/hSunday Night: Mostly clear, with a low around 64°F18°C. Breezy from the SSW at 6 to 7 mph10 to 12 km/h.
Partly CloudyHigh 83°F28°CLow 61°F16°CPrecip 0 in0 mm—Cloud 44%Wind SSW 10 mph16 km/hMonday: Partly cloudy and warm, with a high of 83°F28°C and morning low of 61°F16°C. Breezy from the SSW at 10 to 12 mph17 to 19 km/h. Monday Night: Mostly cloudy, with a low around 61°F16°C. Breezy from the SSW at 10 to 13 mph16 to 20 km/h.
DrizzleHigh 77°F25°CLow 66°F19°CPrecip 0.03 in0.7 mm26%Cloud 16%Wind WSW 9 mph14 km/hTuesday: Mostly clear and warm, with a high of 77°F25°C and morning low of 69°F21°C. Breezy from the W at 9 to 10 mph14 to 16 km/h. Tuesday Night: Mostly clear, with a low around 66°F19°C. Breezy from the WSW at 8 to 13 mph14 to 21 km/h. 26% chance of drizzle in the evening.
Light RainHigh 65°F18°CLow 56°F14°CPrecip 0.19 in4.9 mm64%Cloud 95%Wind NE 8 mph12 km/hWednesday: Overcast and mild, with a high of 63°F17°C. Breezy from the NE at 8 to 9 mph12 to 14 km/h. 57% chance of light rain in the morning. Wednesday Night: Overcast, with a low around 56°F14°C. Breezy from the NE at 8 to 9 mph12 to 15 km/h. 64% chance of light rain overnight.
RainHigh 58°F15°CLow 55°F13°CPrecip 0.44 in11.3 mm83%Cloud 98%Wind ENE 8 mph13 km/hThursday: Overcast and mild, with a high of 58°F15°C. Breezy from the E at 7 to 8 mph12 to 13 km/h. 83% chance of rain in the morning. Thursday Night: Overcast, with a low around 55°F13°C. Breezy from the NNE at 9 to 11 mph14 to 18 km/h. 67% chance of light rain before dawn.
DrizzleHigh 55°F13°CLow 43°F6°CFeels 38°F3°CPrecip 0.04 in1 mm25%Cloud 55%Wind NW 13 mph21 km/hFriday: Mostly cloudy and mild, with a high of 53°F12°C and morning low of 48°F9°C. Windy from the NW at 14 to 16 mph23 to 26 km/h. 13% chance of drizzle around midday. Dry air. Friday Night: Partly cloudy, with a low around 43°F6°C. Breezy from the NW at 11 to 14 mph18 to 22 km/h. 25% chance of drizzle overnight.
ClearHigh 55°F13°CLow 34°F1°CFeels 29°F-2°CPrecip 0 in0 mm—Cloud 5%Wind W 7 mph12 km/hSaturday: Mostly clear and mild, with a high of 55°F13°C and morning low of 34°F1°C. Breezy from the WSW at 7 to 8 mph12 to 13 km/h. Dry air. Saturday Night: Mostly clear, with a low around 35°F2°C. Frost likely. Breezy from the W at 8 to 9 mph12 to 14 km/h.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
SundayOct 1168°F20°C64°F18°C0 in0 mm· —6%ClearSSW 6 mph10 km/h
MondayOct 1283°F28°C61°F16°C0 in0 mm· —44%Partly CloudySSW 10 mph16 km/h
TuesdayOct 1377°F25°C66°F19°C0.03 in0.7 mm· 26%16%DrizzleWSW 9 mph14 km/h
WednesdayOct 1465°F18°C56°F14°C0.19 in4.9 mm· 64%95%Light RainNE 8 mph12 km/h
ThursdayOct 1558°F15°C55°F13°C0.44 in11.3 mm· 83%98%RainENE 8 mph13 km/h
FridayOct 1655°F13°C43°F6°C
Feels 38°F3°C
0.04 in1 mm· 25%55%DrizzleNW 13 mph21 km/h
SaturdayOct 1755°F13°C34°F1°C
Feels 29°F-2°C
0 in0 mm· —5%ClearW 7 mph12 km/h
SundayOct 1860°F16°C38°F4°C
Feels 33°F0°C
0.01 in0.2 mm· 2%24%ClearSSW 9 mph14 km/h
MondayOct 1963°F17°C48°F9°C
Feels 44°F7°C
0.02 in0.6 mm· 11%54%DrizzleSSW 8 mph13 km/h
TuesdayOct 2066°F19°C49°F10°C0.02 in0.4 mm· 6%35%ClearSSE 7 mph11 km/h
WednesdayOct 2167°F20°C53°F12°C0.11 in2.7 mm· 23%54%ShowersS 9 mph14 km/h
ThursdayOct 2265°F18°C56°F13°C0.26 in6.5 mm· 30%70%ShowersSSW 9 mph15 km/h
FridayOct 2362°F16°C53°F12°C0.2 in5 mm· 30%69%ShowersSW 9 mph14 km/h
SaturdayOct 2460°F16°C49°F9°C
Feels 45°F7°C
0.13 in3.3 mm· 24%56%ShowersSW 9 mph14 km/h
SundayOct 2558°F14°C46°F8°C
Feels 42°F6°C
0.1 in2.6 mm· 16%57%DrizzleW 8 mph13 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: 41.9142°N, 88.3087°W·Elevation: 223m·Timezone: America/Chicago·Population: 32,974