Current Conditions

Granite City, Illinois

91°F33°C

Hot

Feels like103°F39°C

Wind

SSW 3 mph4 km/h

Humidity

60%

Cloud Cover

96%

As of Thursday, August 13, 2026 at 12:01 PM CDT

Today's Outlook

Day

Overcast and hot, with a high of 95°F35°C and morning low of 76°F24°C — feels like 108°F42°C. Light wind from the S around 4 mph7 km/h. Heat risk in the afternoon.

Night

Mostly cloudy, with a low around 86°F30°C. Breezy from the SE at 8 to 9 mph12 to 14 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Hot	High 95°F35°CFeels 107°F42°C	Low 76°F24°C	Precip 0.01 in0.3 mm9%	Cloud 78%	Wind SSE 5 mph9 km/h	Thursday: Overcast and hot, with a high of 95°F35°C and morning low of 76°F24°C — feels like 108°F42°C. Light wind from the S around 4 mph7 km/h. Heat risk in the afternoon. Thursday Night: Mostly cloudy, with a low around 86°F30°C. Breezy from the SE at 8 to 9 mph12 to 14 km/h.
Hot	High 95°F35°CFeels 104°F40°C	Low 79°F26°C	Precip 0.01 in0.2 mm4%	Cloud 66%	Wind SSE 6 mph9 km/h	Friday: Mostly cloudy 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 4 mph7 km/h. Heat risk in the afternoon. Friday Night: Mostly cloudy, with a low around 82°F28°C. Breezy from the S at 7 to 9 mph11 to 14 km/h.
Drizzle	High 94°F34°CFeels 101°F39°C	Low 79°F26°C	Precip 0.03 in0.8 mm17%	Cloud 72%	Wind S 5 mph9 km/h	Saturday: Overcast and hot, with a high of 94°F34°C and morning low of 79°F26°C — feels like 102°F39°C. Light wind from the SW around 5 mph8 km/h. 17% chance of drizzle in the morning. Heat risk in the afternoon. Saturday Night: Mostly cloudy, with a low around 81°F27°C. Breezy from the S at 6 to 7 mph9 to 11 km/h. 10% chance of drizzle before dawn.
Showers	High 97°F36°CFeels 106°F41°C	Low 80°F27°C	Precip 0.04 in1 mm17%	Cloud 49%	Wind W 7 mph11 km/h	Sunday: Partly cloudy and hot, with a high of 97°F36°C and morning low of 80°F27°C — feels like 106°F41°C. Breezy from the W at 6 to 7 mph10 to 11 km/h. 11% chance of drizzle. Heat risk in the afternoon. Sunday Night: Mostly cloudy, with a low around 82°F28°C. Breezy from the W at 7 mph11 km/h. 17% chance of showers in the evening.
Drizzle	High 86°F30°CFeels 89°F31°C	Low 73°F23°C	Precip 0.04 in0.9 mm14%	Cloud 50%	Wind NNW 6 mph10 km/h	Monday: Mostly cloudy and hot, with a high of 86°F30°C and morning low of 73°F23°C. Breezy from the NNW at 7 mph11 km/h. Humid. Monday Night: Partly cloudy, with a low around 75°F24°C. Breezy from the N at 6 to 7 mph10 to 11 km/h. 14% chance of drizzle overnight.
Clear	High 91°F33°C	Low 70°F21°C	Precip 0.01 in0.3 mm4%	Cloud 27%	Wind SE 4 mph7 km/h	Tuesday: Mostly clear and hot, with a high of 91°F33°C and morning low of 70°F21°C. Light wind from the SSE around 4 mph6 km/h. Humid. Tuesday Night: Partly cloudy, with a low around 71°F22°C. Breezy from the ESE at 5 to 8 mph8 to 12 km/h.
Showers	High 93°F34°CFeels 98°F37°C	Low 76°F24°C	Precip 0.07 in1.9 mm20%	Cloud 60%	Wind SSW 7 mph12 km/h	Wednesday: Mostly cloudy and hot, with a high of 93°F34°C and morning low of 76°F24°C — feels like 99°F37°C. Breezy from the SW at 7 to 8 mph12 to 12 km/h. 15% chance of drizzle in the morning. Heat risk in the afternoon. Wednesday Night: Mostly cloudy, with a low around 78°F25°C. Breezy from the SSE at 7 to 8 mph12 to 13 km/h. 20% chance of showers throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdayAug 13	95°F35°C Feels 107°F42°C	76°F24°C	0.01 in0.3 mm· 9%	78%	Hot	SSE 5 mph9 km/h
DayOvercast and hot, with a high of 95°F35°C and morning low of 76°F24°C — feels like 108°F42°C. Light wind from the S around 4 mph7 km/h. Heat risk in the afternoon. NightMostly cloudy, with a low around 86°F30°C. Breezy from the SE at 8 to 9 mph12 to 14 km/h.
	FridayAug 14	95°F35°C Feels 104°F40°C	79°F26°C	0.01 in0.2 mm· 4%	66%	Hot	SSE 6 mph9 km/h
DayMostly cloudy 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 4 mph7 km/h. Heat risk in the afternoon. NightMostly cloudy, with a low around 82°F28°C. Breezy from the S at 7 to 9 mph11 to 14 km/h.
	SaturdayAug 15	94°F34°C Feels 101°F39°C	79°F26°C	0.03 in0.8 mm· 17%	72%	Drizzle	S 5 mph9 km/h
DayOvercast and hot, with a high of 94°F34°C and morning low of 79°F26°C — feels like 102°F39°C. Light wind from the SW around 5 mph8 km/h. 17% chance of drizzle in the morning. Heat risk in the afternoon. NightMostly cloudy, with a low around 81°F27°C. Breezy from the S at 6 to 7 mph9 to 11 km/h. 10% chance of drizzle before dawn.
	SundayAug 16	97°F36°C Feels 106°F41°C	80°F27°C	0.04 in1 mm· 17%	49%	Showers	W 7 mph11 km/h
DayPartly cloudy and hot, with a high of 97°F36°C and morning low of 80°F27°C — feels like 106°F41°C. Breezy from the W at 6 to 7 mph10 to 11 km/h. 11% chance of drizzle. Heat risk in the afternoon. NightMostly cloudy, with a low around 82°F28°C. Breezy from the W at 7 mph11 km/h. 17% chance of showers in the evening.
	MondayAug 17	86°F30°C Feels 89°F31°C	73°F23°C	0.04 in0.9 mm· 14%	50%	Drizzle	NNW 6 mph10 km/h
DayMostly cloudy and hot, with a high of 86°F30°C and morning low of 73°F23°C. Breezy from the NNW at 7 mph11 km/h. Humid. NightPartly cloudy, with a low around 75°F24°C. Breezy from the N at 6 to 7 mph10 to 11 km/h. 14% chance of drizzle overnight.
	TuesdayAug 18	91°F33°C	70°F21°C	0.01 in0.3 mm· 4%	27%	Clear	SE 4 mph7 km/h
DayMostly clear and hot, with a high of 91°F33°C and morning low of 70°F21°C. Light wind from the SSE around 4 mph6 km/h. Humid. NightPartly cloudy, with a low around 71°F22°C. Breezy from the ESE at 5 to 8 mph8 to 12 km/h.
	WednesdayAug 19	93°F34°C Feels 98°F37°C	76°F24°C	0.07 in1.9 mm· 20%	60%	Showers	SSW 7 mph12 km/h
DayMostly cloudy and hot, with a high of 93°F34°C and morning low of 76°F24°C — feels like 99°F37°C. Breezy from the SW at 7 to 8 mph12 to 12 km/h. 15% chance of drizzle in the morning. Heat risk in the afternoon. NightMostly cloudy, with a low around 78°F25°C. Breezy from the SSE at 7 to 8 mph12 to 13 km/h. 20% chance of showers throughout the night.
	ThursdayAug 20	88°F31°C	72°F22°C	0.07 in1.8 mm· 11%	45%	Drizzle	N 6 mph10 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 72°F22°C. Light wind from the N around 6 mph10 km/h. Humid. NightPartly cloudy, with a low around 74°F24°C. Breezy from the NNE at 6 to 7 mph10 to 11 km/h. 11% chance of drizzle throughout the night.
	FridayAug 21	88°F31°C	70°F21°C	0.07 in1.8 mm· 13%	47%	Drizzle	E 6 mph9 km/h
DayMostly cloudy and hot, with a high of 88°F31°C and morning low of 70°F21°C. Light wind from the ESE around 5 mph9 km/h. 12% chance of drizzle throughout the day. NightPartly cloudy, with a low around 71°F22°C. Light wind from the E around 6 mph9 km/h. 13% chance of drizzle throughout the night.
	SaturdayAug 22	90°F32°C	71°F21°C	0.07 in1.9 mm· 15%	43%	Showers	SE 6 mph10 km/h
DayPartly cloudy and hot, with a high of 90°F32°C and morning low of 71°F21°C. Light wind from the S around 6 mph10 km/h. 15% chance of showers throughout the day. NightPartly cloudy, with a low around 72°F22°C. Light wind from the ESE around 6 mph10 km/h. 14% chance of showers before dawn.
	SundayAug 23	92°F33°C	71°F22°C	0.02 in0.6 mm· 5%	30%	Clear	ESE 6 mph9 km/h
DayPartly cloudy and hot, with a high of 92°F33°C and morning low of 71°F22°C. Light wind from the SSW around 6 mph10 km/h. NightPartly cloudy, with a low around 73°F23°C. Light wind from the ESE around 6 mph9 km/h.
	MondayAug 24	93°F34°C	71°F22°C	0.01 in0.2 mm· 3%	27%	Clear	ESE 6 mph9 km/h
DayPartly cloudy and hot, with a high of 93°F34°C and morning low of 71°F22°C. Light wind from the SE around 6 mph9 km/h. NightMostly clear, with a low around 73°F23°C. Light wind from the ESE around 6 mph9 km/h.
	TuesdayAug 25	94°F34°C	72°F22°C	0.02 in0.4 mm· 4%	32%	Clear	SE 6 mph10 km/h
DayPartly cloudy and hot, with a high of 94°F34°C and morning low of 72°F22°C. Light wind from the SSE around 6 mph9 km/h. NightPartly cloudy, with a low around 74°F23°C. Light wind from the ESE around 6 mph10 km/h.
	WednesdayAug 26	94°F34°C	73°F23°C	0.03 in0.8 mm· 10%	38%	Drizzle	ESE 6 mph9 km/h
DayPartly cloudy and hot, with a high of 94°F34°C and morning low of 73°F23°C. Light wind from the SSE around 6 mph9 km/h. NightPartly cloudy, with a low around 74°F24°C. Light wind from the ESE around 6 mph10 km/h. 10% chance of drizzle throughout the night.
	ThursdayAug 27	91°F33°C	73°F23°C	0.08 in2.1 mm· 17%	51%	Drizzle	ESE 6 mph10 km/h
DayMostly cloudy and hot, with a high of 91°F33°C and morning low of 73°F23°C. Light wind from the ESE around 6 mph9 km/h. 13% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 75°F24°C. Light wind from the E around 6 mph10 km/h. 17% chance of drizzle throughout the night.

Nearby Cities

East Saint Louis5 mi9 km St. Louis6 mi9 km Spanish Lake7 mi11 km Ferguson9 mi14 km Collinsville9 mi15 km University City9 mi15 km

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

Pattern	Example	Description
/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=11.5	Find 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: 38.7014°N, 90.1487°W·Elevation: 129m·Timezone: America/Chicago·Population: 29,054