Current Conditions

Alton, Illinois

78°F26°C

Partly Cloudy

Wind

NE 4 mph6 km/h

Humidity

45%

Cloud Cover

85%

As of Thursday, July 23, 2026 at 12:46 PM CDT

Today's Outlook

Day

Mostly cloudy and warm, with a high of 80°F27°C and morning low of 65°F18°C. Light wind from the ENE around 5 mph7 km/h.

Night

Overcast, with a low around 72°F22°C. Light wind from the ENE around 5 mph8 km/h.

7-Day Forecast

Day	Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
ThursdayJul 23	Partly Cloudy	High 80°F27°C	Low 65°F18°C	Precip 0 in0 mm—	Cloud 74%	Wind ENE 5 mph7 km/h	Thursday: Mostly cloudy and warm, with a high of 80°F27°C and morning low of 65°F18°C. Light wind from the ENE around 5 mph7 km/h. Thursday Night: Overcast, with a low around 72°F22°C. Light wind from the ENE around 5 mph8 km/h.
FridayJul 24	Light Rain	High 70°F21°C	Low 68°F20°C	Precip 0.3 in7.5 mm83%	Cloud 91%	Wind SE 4 mph7 km/h	Friday: Overcast and warm, with a high of 70°F21°C. Light wind from the SSE around 4 mph6 km/h. 83% chance of light rain throughout the day. Friday Night: Overcast, with a low around 68°F20°C. Light wind from the ESE around 5 mph8 km/h. 49% chance of light rain in the evening.
SaturdayJul 25	Showers	High 87°F30°CFeels 96°F35°C	Low 68°F20°C	Precip 0.13 in3.4 mm66%	Cloud 68%	Wind SSE 4 mph7 km/h	Saturday: Mostly cloudy and hot, with a high of 86°F30°C and morning low of 69°F21°C — feels like 95°F35°C. Light wind from the S around 4 mph6 km/h. 66% chance of light rain throughout the day. Heat risk in the afternoon. Saturday Night: Mostly cloudy, with a low around 68°F20°C. Light wind from the SSE around 5 mph7 km/h. 55% chance of showers overnight.
SundayJul 26	Hot	High 98°F37°CFeels 110°F43°C	Low 76°F25°C	Precip 0.01 in0.2 mm4%	Cloud 48%	Wind S 4 mph7 km/h	Sunday: Mostly cloudy and hot, with a high of 98°F37°C and morning low of 76°F25°C — feels like 109°F43°C. Light wind from the SSW around 4 mph6 km/h. Heat risk in the afternoon. Sunday Night: Partly cloudy, with a low around 76°F25°C. Light wind from the SSE around 4 mph7 km/h.
MondayJul 27	Drizzle	High 98°F37°CFeels 107°F42°C	Low 80°F26°C	Precip 0.04 in0.9 mm12%	Cloud 46%	Wind SSW 7 mph11 km/h	Monday: Mostly cloudy and hot, with a high of 98°F37°C and morning low of 80°F26°C — feels like 108°F42°C. Breezy from the SW at 7 to 9 mph12 to 14 km/h. 12% chance of drizzle in the morning. Heat risk in the afternoon. Monday Night: Partly cloudy, with a low around 81°F27°C. Breezy from the SSW at 7 mph11 km/h.
TuesdayJul 28	Drizzle	High 96°F36°CFeels 104°F40°C	Low 81°F27°CFeels 85°F30°C	Precip 0.03 in0.8 mm12%	Cloud 34%	Wind NW 6 mph10 km/h	Tuesday: Partly cloudy and hot, with a high of 96°F36°C and morning low of 81°F27°C — feels like 104°F40°C. Breezy from the NW at 6 to 7 mph10 to 11 km/h. Heat risk in the afternoon. Tuesday Night: Partly cloudy, with a low around 82°F28°C. Breezy from the WNW at 6 to 7 mph10 to 12 km/h. 12% chance of drizzle in the evening.
WednesdayJul 29	Clear	High 94°F35°C	Low 75°F24°C	Precip 0.02 in0.6 mm6%	Cloud 21%	Wind NE 5 mph9 km/h	Wednesday: Mostly clear and hot, with a high of 94°F35°C and morning low of 75°F24°C. Light wind from the ENE around 5 mph8 km/h. Humid. Wednesday Night: Mostly clear, with a low around 77°F25°C. Light wind from the NE around 5 mph9 km/h.

15-Day Forecast

	Day	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Condition	Wind (mph)
	ThursdayJul 23	80°F27°C	65°F18°C	0 in0 mm· —	74%	Partly Cloudy	ENE 5 mph7 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 65°F18°C. Light wind from the ENE around 5 mph7 km/h. NightOvercast, with a low around 72°F22°C. Light wind from the ENE around 5 mph8 km/h.
	FridayJul 24	70°F21°C	68°F20°C	0.3 in7.5 mm· 83%	91%	Light Rain	SE 4 mph7 km/h
DayOvercast and warm, with a high of 70°F21°C. Light wind from the SSE around 4 mph6 km/h. 83% chance of light rain throughout the day. NightOvercast, with a low around 68°F20°C. Light wind from the ESE around 5 mph8 km/h. 49% chance of light rain in the evening.
	SaturdayJul 25	87°F30°C Feels 96°F35°C	68°F20°C	0.13 in3.4 mm· 66%	68%	Showers	SSE 4 mph7 km/h
DayMostly cloudy and hot, with a high of 86°F30°C and morning low of 69°F21°C — feels like 95°F35°C. Light wind from the S around 4 mph6 km/h. 66% chance of light rain throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 68°F20°C. Light wind from the SSE around 5 mph7 km/h. 55% chance of showers overnight.
	SundayJul 26	98°F37°C Feels 110°F43°C	76°F25°C	0.01 in0.2 mm· 4%	48%	Hot	S 4 mph7 km/h
DayMostly cloudy and hot, with a high of 98°F37°C and morning low of 76°F25°C — feels like 109°F43°C. Light wind from the SSW around 4 mph6 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 76°F25°C. Light wind from the SSE around 4 mph7 km/h.
	MondayJul 27	98°F37°C Feels 107°F42°C	80°F26°C	0.04 in0.9 mm· 12%	46%	Drizzle	SSW 7 mph11 km/h
DayMostly cloudy and hot, with a high of 98°F37°C and morning low of 80°F26°C — feels like 108°F42°C. Breezy from the SW at 7 to 9 mph12 to 14 km/h. 12% chance of drizzle in the morning. Heat risk in the afternoon. NightPartly cloudy, with a low around 81°F27°C. Breezy from the SSW at 7 mph11 km/h.
	TuesdayJul 28	96°F36°C Feels 104°F40°C	81°F27°C Feels 85°F30°C	0.03 in0.8 mm· 12%	34%	Drizzle	NW 6 mph10 km/h
DayPartly cloudy and hot, with a high of 96°F36°C and morning low of 81°F27°C — feels like 104°F40°C. Breezy from the NW at 6 to 7 mph10 to 11 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 82°F28°C. Breezy from the WNW at 6 to 7 mph10 to 12 km/h. 12% chance of drizzle in the evening.
	WednesdayJul 29	94°F35°C	75°F24°C	0.02 in0.6 mm· 6%	21%	Clear	NE 5 mph9 km/h
DayMostly clear and hot, with a high of 94°F35°C and morning low of 75°F24°C. Light wind from the ENE around 5 mph8 km/h. Humid. NightMostly clear, with a low around 77°F25°C. Light wind from the NE around 5 mph9 km/h.
	ThursdayJul 30	94°F35°C	74°F23°C	0.02 in0.5 mm· 8%	27%	Clear	E 5 mph8 km/h
DayPartly cloudy and hot, with a high of 94°F35°C and morning low of 74°F23°C. Light wind from the E around 5 mph8 km/h. Humid. NightMostly clear, with a low around 76°F24°C. Light wind from the E around 5 mph9 km/h.
	FridayJul 31	93°F34°C	75°F24°C	0.07 in1.9 mm· 19%	43%	Showers	SE 5 mph8 km/h
DayPartly cloudy and hot, with a high of 93°F34°C and morning low of 75°F24°C. Light wind from the SSE around 5 mph8 km/h. 18% chance of drizzle throughout the day. Heat risk in the afternoon. NightPartly cloudy, with a low around 76°F24°C. Light wind from the SE around 5 mph8 km/h. 19% chance of showers in the evening.
	SaturdayAug 1	94°F34°C	74°F23°C	0.08 in2.1 mm· 11%	28%	Drizzle	NE 5 mph9 km/h
DayPartly cloudy and hot, with a high of 94°F34°C and morning low of 74°F23°C. Light wind from the NW around 5 mph9 km/h. 11% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 75°F24°C. Light wind from the ESE around 5 mph9 km/h.
	SundayAug 2	94°F34°C	73°F23°C	0.02 in0.6 mm· 6%	31%	Clear	SSE 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 S around 6 mph10 km/h. Humid. NightPartly cloudy, with a low around 75°F24°C. Light wind from the SE around 6 mph9 km/h.
	MondayAug 3	94°F34°C	74°F23°C	0.06 in1.5 mm· 15%	37%	Drizzle	S 6 mph10 km/h
DayPartly cloudy and hot, with a high of 94°F34°C and morning low of 74°F23°C. Breezy from the SSW at 6 to 7 mph10 to 11 km/h. 10% chance of drizzle around midday. Humid. NightPartly cloudy, with a low around 75°F24°C. Light wind from the S around 6 mph10 km/h. 15% chance of drizzle in the evening.
	TuesdayAug 4	93°F34°C	75°F24°C	0.09 in2.4 mm· 16%	47%	Showers	SSW 6 mph10 km/h
DayMostly cloudy and hot, with a high of 93°F34°C and morning low of 75°F24°C. Breezy from the SW at 6 to 7 mph10 to 11 km/h. 11% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 76°F24°C. Breezy from the SSW at 6 to 7 mph10 to 11 km/h. 16% chance of showers throughout the night.
	WednesdayAug 5	91°F33°C	74°F23°C	0.09 in2.2 mm· 15%	46%	Drizzle	SW 6 mph10 km/h
DayMostly cloudy and hot, with a high of 91°F33°C and morning low of 74°F23°C. Breezy from the WSW at 6 to 7 mph10 to 12 km/h. 12% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 75°F24°C. Light wind from the SSW around 6 mph10 km/h. 15% chance of drizzle throughout the night.
	ThursdayAug 6	90°F32°C	73°F23°C	0.08 in2.1 mm· 14%	46%	Showers	SW 6 mph10 km/h
DayMostly cloudy and hot, with a high of 90°F32°C and morning low of 73°F23°C. Breezy from the WSW at 7 mph11 km/h. 10% chance of drizzle throughout the day. NightPartly cloudy, with a low around 74°F24°C. Light wind from the SSW around 6 mph10 km/h. 14% chance of showers throughout the night.

Nearby Cities

Upper Alton2 mi4 km Godfrey4 mi7 km Old Jamestown7 mi11 km Spanish Lake7 mi12 km Florissant10 mi16 km Ferguson12 mi19 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: 38.8906°N, 90.1843°W·Elevation: 150m·Timezone: America/Chicago·Population: 27,003