Current Conditions

Granite City, Illinois

62°F17°C
Cloudy

Wind

NNE 6 mph9 km/h

Humidity

80%

Cloud Cover

71%

As of Wednesday, September 23, 2026 at 3:22 AM CDT

Today's Outlook

Day

Overcast and warm, with a high of 69°F21°C and morning low of 61°F16°C. Breezy from the NNE at 7 to 8 mph12 to 13 km/h.

Night

Mostly cloudy, with a low around 62°F17°C. Light wind from the NNE around 6 mph10 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
CloudyHigh 69°F21°CLow 61°F16°CPrecip 0.01 in0.2 mm5%Cloud 85%Wind NNE 7 mph11 km/hWednesday: Overcast and warm, with a high of 69°F21°C and morning low of 61°F16°C. Breezy from the NNE at 7 to 8 mph12 to 13 km/h. Wednesday Night: Mostly cloudy, with a low around 62°F17°C. Light wind from the NNE around 6 mph10 km/h.
CloudyHigh 71°F22°CLow 61°F16°CPrecip 0 in0.1 mm1%Cloud 87%Wind NE 5 mph7 km/hThursday: Overcast and warm, with a high of 71°F22°C and morning low of 61°F16°C. Light wind from the NE around 5 mph7 km/h. Thursday Night: Overcast, with a low around 61°F16°C. Light wind from the NE around 5 mph7 km/h.
CloudyHigh 76°F24°CLow 63°F17°CPrecip 0.01 in0.3 mm5%Cloud 85%Wind ENE 4 mph7 km/hFriday: Overcast and warm, with a high of 76°F24°C and morning low of 63°F17°C. Light wind from the ENE around 4 mph7 km/h. Friday Night: Overcast, with a low around 63°F17°C. Light wind from the NE around 4 mph7 km/h.
DrizzleHigh 72°F22°CLow 61°F16°CPrecip 0.06 in1.5 mm30%Cloud 90%Wind E 4 mph7 km/hSaturday: Overcast and warm, with a high of 72°F22°C and morning low of 61°F16°C. Light wind from the E around 4 mph6 km/h. 30% chance of drizzle throughout the day. Saturday Night: Overcast, with a low around 63°F17°C. Light wind from the ENE around 5 mph7 km/h. 26% chance of drizzle in the evening.
DrizzleHigh 75°F24°CLow 60°F16°CPrecip 0.05 in1.3 mm23%Cloud 60%Wind ENE 4 mph7 km/hSunday: Mostly cloudy and warm, with a high of 75°F24°C and morning low of 60°F16°C. Light wind from the ENE around 4 mph6 km/h. 17% chance of drizzle throughout the day. Sunday Night: Mostly cloudy, with a low around 62°F16°C. Light wind from the NE around 4 mph7 km/h. 23% chance of drizzle overnight.
ClearHigh 79°F26°CLow 56°F13°CPrecip 0 in0 mmCloud 25%Wind ENE 4 mph6 km/hMonday: Mostly clear and warm, with a high of 79°F26°C and morning low of 56°F13°C. Light wind from the ENE around 3 mph6 km/h. Dry air. Monday Night: Partly cloudy, with a low around 59°F15°C. Light wind from the ENE around 4 mph7 km/h.
Light RainHigh 78°F26°CLow 57°F14°CPrecip 0.13 in3.4 mm36%Cloud 72%Wind SSE 6 mph10 km/hTuesday: Mostly cloudy and warm, with a high of 78°F26°C and morning low of 57°F14°C. Breezy from the SSE at 6 to 7 mph10 to 11 km/h. 20% chance of light rain throughout the day. Tuesday Night: Mostly cloudy, with a low around 59°F15°C. Breezy from the SE at 6 to 7 mph10 to 12 km/h. 36% chance of showers in the evening.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
WednesdaySep 2369°F21°C61°F16°C0.01 in0.2 mm· 5%85%CloudyNNE 7 mph11 km/h
ThursdaySep 2471°F22°C61°F16°C0 in0.1 mm· 1%87%CloudyNE 5 mph7 km/h
FridaySep 2576°F24°C63°F17°C0.01 in0.3 mm· 5%85%CloudyENE 4 mph7 km/h
SaturdaySep 2672°F22°C61°F16°C0.06 in1.5 mm· 30%90%DrizzleE 4 mph7 km/h
SundaySep 2775°F24°C60°F16°C0.05 in1.3 mm· 23%60%DrizzleENE 4 mph7 km/h
MondaySep 2879°F26°C56°F13°C0 in0 mm· —25%ClearENE 4 mph6 km/h
TuesdaySep 2978°F26°C57°F14°C0.13 in3.4 mm· 36%72%Light RainSSE 6 mph10 km/h
WednesdaySep 3073°F23°C63°F17°C0.39 in10 mm· 43%80%Light RainSSW 7 mph12 km/h
ThursdayOct 172°F22°C60°F15°C0.24 in6 mm· 29%65%ShowersNW 7 mph11 km/h
FridayOct 274°F23°C57°F14°C0.14 in3.5 mm· 21%53%ShowersSW 7 mph11 km/h
SaturdayOct 375°F24°C58°F15°C0.11 in2.8 mm· 18%53%ShowersSW 7 mph11 km/h
SundayOct 472°F22°C57°F14°C0.09 in2.2 mm· 13%50%DrizzleWNW 7 mph11 km/h
MondayOct 570°F21°C53°F12°C0.09 in2.2 mm· 11%47%DrizzleWNW 7 mph11 km/h
TuesdayOct 670°F21°C52°F11°C0.04 in1.1 mm· 10%40%DrizzleNW 7 mph11 km/h
WednesdayOct 770°F21°C51°F10°C0.04 in1.1 mm· 9%35%ClearNW 6 mph10 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.

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Coordinates: 38.7014°N, 90.1487°W·Elevation: 129m·Timezone: America/Chicago·Population: 29,054