Current Conditions

Upper Alton, Illinois

90°F32°C

Hot

Feels like101°F39°C

Wind

ENE 3 mph4 km/h

Humidity

62%

Cloud Cover

97%

As of Thursday, August 13, 2026 at 11:46 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 106°F41°C. Light wind from the SSE around 4 mph7 km/h. Heat risk in the afternoon.

Night

Mostly cloudy, with a low around 85°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 94°F34°CFeels 106°F41°C	Low 75°F24°C	Precip 0.01 in0.3 mm9%	Cloud 82%	Wind SE 5 mph9 km/h	Thursday: Overcast and hot, with a high of 94°F34°C and morning low of 75°F24°C — feels like 106°F41°C. Light wind from the SSE around 4 mph7 km/h. Heat risk in the afternoon. Thursday Night: Mostly cloudy, with a low around 85°F30°C. Breezy from the SE at 8 to 9 mph12 to 14 km/h.
Hot	High 94°F35°CFeels 103°F40°C	Low 78°F26°C	Precip 0.01 in0.3 mm6%	Cloud 71%	Wind SSE 6 mph9 km/h	Friday: Overcast and hot, with a high of 94°F35°C and morning low of 78°F26°C — feels like 104°F40°C. Light wind from the SE around 5 mph8 km/h. Heat risk in the afternoon. Friday Night: Mostly cloudy, with a low around 81°F27°C. Breezy from the SSE at 6 to 9 mph10 to 14 km/h.
Drizzle	High 92°F34°CFeels 100°F38°C	Low 78°F26°C	Precip 0.05 in1.2 mm24%	Cloud 76%	Wind S 5 mph9 km/h	Saturday: Overcast and hot, with a high of 92°F34°C and morning low of 78°F26°C — feels like 100°F38°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. 24% chance of drizzle throughout the day. Heat risk in the afternoon. Saturday Night: Mostly cloudy, with a low around 81°F27°C. Breezy from the SSE at 6 to 7 mph9 to 11 km/h. 16% chance of drizzle overnight.
Showers	High 96°F35°CFeels 105°F41°C	Low 79°F26°C	Precip 0.05 in1.3 mm19%	Cloud 53%	Wind W 6 mph10 km/h	Sunday: Mostly cloudy and hot, with a high of 96°F35°C and morning low of 79°F26°C — feels like 106°F41°C. Light wind from the W around 6 mph10 km/h. Heat risk in the afternoon. Sunday Night: Mostly cloudy, with a low around 81°F27°C. Breezy from the WNW at 7 mph11 km/h. 19% chance of showers in the evening.
Drizzle	High 86°F30°C	Low 72°F22°C	Precip 0.04 in0.9 mm15%	Cloud 50%	Wind NNW 6 mph10 km/h	Monday: Mostly cloudy and warm, with a high of 86°F30°C and morning low of 72°F22°C. Breezy from the NNW at 7 mph11 km/h. Humid. Monday Night: Partly cloudy, with a low around 74°F23°C. Breezy from the N at 6 to 7 mph9 to 11 km/h. 15% chance of drizzle overnight.
Clear	High 91°F33°C	Low 69°F21°C	Precip 0.01 in0.2 mm2%	Cloud 27%	Wind SE 4 mph7 km/h	Tuesday: Mostly clear and hot, with a high of 91°F33°C and morning low of 69°F21°C. Light wind from the SSE around 4 mph6 km/h. Humid. Tuesday Night: Partly cloudy, with a low around 70°F21°C. Breezy from the ESE at 5 to 8 mph8 to 12 km/h.
Drizzle	High 92°F33°CFeels 97°F36°C	Low 76°F24°C	Precip 0.08 in2 mm21%	Cloud 62%	Wind SSW 7 mph12 km/h	Wednesday: Mostly cloudy and hot, with a high of 92°F33°C and morning low of 76°F24°C. Breezy from the SW at 7 to 8 mph12 to 12 km/h. 14% chance of drizzle in the morning. Heat risk in the afternoon. Wednesday Night: Mostly cloudy, with a low around 77°F25°C. Breezy from the SSE at 7 to 8 mph12 to 14 km/h. 21% chance of drizzle throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdayAug 13	94°F34°C Feels 106°F41°C	75°F24°C	0.01 in0.3 mm· 9%	82%	Hot	SE 5 mph9 km/h
DayOvercast and hot, with a high of 94°F34°C and morning low of 75°F24°C — feels like 106°F41°C. Light wind from the SSE around 4 mph7 km/h. Heat risk in the afternoon. NightMostly cloudy, with a low around 85°F30°C. Breezy from the SE at 8 to 9 mph12 to 14 km/h.
	FridayAug 14	94°F35°C Feels 103°F40°C	78°F26°C	0.01 in0.3 mm· 6%	71%	Hot	SSE 6 mph9 km/h
DayOvercast and hot, with a high of 94°F35°C and morning low of 78°F26°C — feels like 104°F40°C. Light wind from the SE around 5 mph8 km/h. Heat risk in the afternoon. NightMostly cloudy, with a low around 81°F27°C. Breezy from the SSE at 6 to 9 mph10 to 14 km/h.
	SaturdayAug 15	92°F34°C Feels 100°F38°C	78°F26°C	0.05 in1.2 mm· 24%	76%	Drizzle	S 5 mph9 km/h
DayOvercast and hot, with a high of 92°F34°C and morning low of 78°F26°C — feels like 100°F38°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. 24% chance of drizzle throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 81°F27°C. Breezy from the SSE at 6 to 7 mph9 to 11 km/h. 16% chance of drizzle overnight.
	SundayAug 16	96°F35°C Feels 105°F41°C	79°F26°C	0.05 in1.3 mm· 19%	53%	Showers	W 6 mph10 km/h
DayMostly cloudy and hot, with a high of 96°F35°C and morning low of 79°F26°C — feels like 106°F41°C. Light wind from the W around 6 mph10 km/h. Heat risk in the afternoon. NightMostly cloudy, with a low around 81°F27°C. Breezy from the WNW at 7 mph11 km/h. 19% chance of showers in the evening.
	MondayAug 17	86°F30°C	72°F22°C	0.04 in0.9 mm· 15%	50%	Drizzle	NNW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 86°F30°C and morning low of 72°F22°C. Breezy from the NNW at 7 mph11 km/h. Humid. NightPartly cloudy, with a low around 74°F23°C. Breezy from the N at 6 to 7 mph9 to 11 km/h. 15% chance of drizzle overnight.
	TuesdayAug 18	91°F33°C	69°F21°C	0.01 in0.2 mm· 2%	27%	Clear	SE 4 mph7 km/h
DayMostly clear and hot, with a high of 91°F33°C and morning low of 69°F21°C. Light wind from the SSE around 4 mph6 km/h. Humid. NightPartly cloudy, with a low around 70°F21°C. Breezy from the ESE at 5 to 8 mph8 to 12 km/h.
	WednesdayAug 19	92°F33°C Feels 97°F36°C	76°F24°C	0.08 in2 mm· 21%	62%	Drizzle	SSW 7 mph12 km/h
DayMostly cloudy and hot, with a high of 92°F33°C and morning low of 76°F24°C. Breezy from the SW at 7 to 8 mph12 to 12 km/h. 14% chance of drizzle in the morning. Heat risk in the afternoon. NightMostly cloudy, with a low around 77°F25°C. Breezy from the SSE at 7 to 8 mph12 to 14 km/h. 21% chance of drizzle throughout the night.
	ThursdayAug 20	87°F30°C	72°F22°C	0.06 in1.6 mm· 10%	44%	Drizzle	N 6 mph10 km/h
DayPartly cloudy and hot, with a high of 87°F30°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°F23°C. Breezy from the NNE at 6 to 7 mph10 to 11 km/h. 10% chance of drizzle throughout the night.
	FridayAug 21	87°F30°C	69°F21°C	0.07 in1.8 mm· 12%	47%	Drizzle	E 6 mph9 km/h
DayMostly cloudy and hot, with a high of 87°F30°C and morning low of 69°F21°C. Light wind from the ESE around 6 mph9 km/h. 12% chance of drizzle throughout the day. NightPartly cloudy, with a low around 71°F21°C. Light wind from the E around 6 mph9 km/h. 11% chance of drizzle throughout the night.
	SaturdayAug 22	89°F32°C	70°F21°C	0.07 in1.8 mm· 15%	43%	Showers	SE 6 mph10 km/h
DayPartly cloudy and hot, with a high of 89°F32°C and morning low of 70°F21°C. Light wind from the S around 6 mph10 km/h. 15% chance of drizzle 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	91°F33°C	70°F21°C	0.02 in0.6 mm· 7%	30%	Clear	ESE 6 mph10 km/h
DayPartly cloudy and hot, with a high of 91°F33°C and morning low of 70°F21°C. Light wind from the SSW around 6 mph10 km/h. NightPartly cloudy, with a low around 72°F22°C. Light wind from the ESE around 6 mph9 km/h.
	MondayAug 24	93°F34°C	71°F21°C	0.01 in0.2 mm· 3%	28%	Clear	ESE 6 mph9 km/h
DayPartly cloudy and hot, with a high of 93°F34°C and morning low of 71°F21°C. Light wind from the SE around 6 mph9 km/h. NightPartly cloudy, with a low around 72°F22°C. Light wind from the ESE around 6 mph10 km/h.
	TuesdayAug 25	93°F34°C	72°F22°C	0.02 in0.5 mm· 5%	33%	Clear	SE 6 mph10 km/h
DayPartly cloudy and hot, with a high of 93°F34°C and morning low of 72°F22°C. Light wind from the SSE around 6 mph10 km/h. NightPartly cloudy, with a low around 74°F23°C. Breezy from the ESE at 6 to 7 mph10 to 11 km/h.
	WednesdayAug 26	93°F34°C	72°F22°C	0.03 in0.7 mm· 9%	39%	Clear	ESE 6 mph10 km/h
DayPartly cloudy and hot, with a high of 93°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 E around 6 mph10 km/h.
	ThursdayAug 27	90°F32°C	72°F22°C	0.07 in1.8 mm· 16%	53%	Drizzle	ESE 6 mph10 km/h
DayMostly cloudy and hot, with a high of 90°F32°C and morning low of 72°F22°C. Light wind from the ESE around 6 mph10 km/h. 14% chance of drizzle throughout the day. Humid. NightMostly cloudy, with a low around 77°F25°C. Light wind from the E around 6 mph10 km/h. 16% chance of drizzle overnight.

Nearby Cities

Alton2 mi4 km Godfrey4 mi6 km Old Jamestown9 mi14 km Spanish Lake9 mi15 km Florissant13 mi20 km Edwardsville13 mi20 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.

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Coordinates: 38.9114°N, 90.1507°W·Elevation: 166m·Timezone: America/Chicago·Population: 29,251