Current Conditions

Alton, Illinois

80°F27°C

Clear

Wind

SW 9 mph15 km/h

Humidity

51%

Cloud Cover

As of Monday, October 12, 2026 at 11:27 AM CDT

Today's Outlook

Day

Mostly clear and hot, with a high of 87°F31°C and morning low of 64°F18°C. Breezy from the SSW at 9 to 10 mph14 to 16 km/h.

Night

Mostly clear, with a low around 64°F18°C. Breezy from the SSW at 9 to 10 mph14 to 16 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Clear	High 87°F31°C	Low 64°F18°C	Precip 0 in0 mm—	Cloud 10%	Wind SSW 9 mph14 km/h	Monday: Mostly clear and hot, with a high of 87°F31°C and morning low of 64°F18°C. Breezy from the SSW at 9 to 10 mph14 to 16 km/h. Monday Night: Mostly clear, with a low around 64°F18°C. Breezy from the SSW at 9 to 10 mph14 to 16 km/h.
Clear	High 88°F31°CFeels 92°F33°C	Low 68°F20°C	Precip 0 in0 mm—	Cloud 11%	Wind SW 8 mph12 km/h	Tuesday: Mostly clear and hot, with a high of 88°F31°C and morning low of 68°F20°C. Breezy from the SW at 7 to 8 mph12 to 12 km/h. Tuesday Night: Mostly clear, with a low around 69°F21°C. Breezy from the SSW at 8 to 10 mph13 to 16 km/h.
Light Rain	High 79°F26°C	Low 68°F20°C	Precip 0.28 in7.2 mm71%	Cloud 87%	Wind WNW 6 mph10 km/h	Wednesday: Overcast and warm, with a high of 73°F23°C. Light wind from the NW around 6 mph9 km/h. 71% chance of light rain in the morning. Humid. Wednesday Night: Overcast, with a low around 68°F20°C. Breezy from the WSW at 7 to 9 mph11 to 15 km/h. 44% chance of light rain before dawn.
Light Rain	High 71°F22°C	Low 63°F17°C	Precip 0.51 in12.9 mm80%	Cloud 88%	Wind W 8 mph12 km/h	Thursday: Overcast and warm, with a high of 71°F22°C and morning low of 66°F19°C. Breezy from the SSW at 7 to 8 mph11 to 13 km/h. 80% chance of light rain in the morning. Humid. Thursday Night: Overcast, with a low around 63°F17°C. Breezy from the NW at 8 to 12 mph13 to 19 km/h. 70% chance of light rain overnight.
Showers	High 61°F16°C	Low 48°F9°CFeels 43°F6°C	Precip 0.06 in1.5 mm39%	Cloud 67%	Wind NW 14 mph22 km/h	Friday: Mostly cloudy and mild, with a high of 55°F13°C. Windy from the NW at 15 to 16 mph24 to 26 km/h. 13% chance of drizzle in the morning. Dry air. Friday Night: Mostly cloudy, with a low around 48°F9°C. Breezy from the NW at 12 to 14 mph19 to 23 km/h. 39% chance of showers overnight.
Clear	High 57°F14°C	Low 38°F4°CFeels 34°F1°C	Precip 0.01 in0.2 mm2%	Cloud 9%	Wind NNE 6 mph10 km/h	Saturday: Mostly clear and mild, with a high of 57°F14°C and morning low of 38°F4°C. Light wind from the NNE around 5 mph8 km/h. Dry air. Saturday Night: Mostly clear, with a low around 39°F4°C. Breezy from the NNE at 7 to 9 mph11 to 15 km/h.
Clear	High 63°F17°C	Low 39°F4°CFeels 34°F1°C	Precip 0.01 in0.3 mm2%	Cloud 23%	Wind SSE 7 mph12 km/h	Sunday: Mostly clear and mild, with a high of 63°F17°C and morning low of 39°F4°C. Breezy from the SSE at 7 to 8 mph12 to 13 km/h. Dry air. Sunday Night: Partly cloudy, with a low around 39°F4°C. Breezy from the SSE at 7 to 8 mph12 to 12 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	MondayOct 12	87°F31°C	64°F18°C	0 in0 mm· —	10%	Clear	SSW 9 mph14 km/h
DayMostly clear and hot, with a high of 87°F31°C and morning low of 64°F18°C. Breezy from the SSW at 9 to 10 mph14 to 16 km/h. NightMostly clear, with a low around 64°F18°C. Breezy from the SSW at 9 to 10 mph14 to 16 km/h.
	TuesdayOct 13	88°F31°C Feels 92°F33°C	68°F20°C	0 in0 mm· —	11%	Clear	SW 8 mph12 km/h
DayMostly clear and hot, with a high of 88°F31°C and morning low of 68°F20°C. Breezy from the SW at 7 to 8 mph12 to 12 km/h. NightMostly clear, with a low around 69°F21°C. Breezy from the SSW at 8 to 10 mph13 to 16 km/h.
	WednesdayOct 14	79°F26°C	68°F20°C	0.28 in7.2 mm· 71%	87%	Light Rain	WNW 6 mph10 km/h
DayOvercast and warm, with a high of 73°F23°C. Light wind from the NW around 6 mph9 km/h. 71% chance of light rain in the morning. Humid. NightOvercast, with a low around 68°F20°C. Breezy from the WSW at 7 to 9 mph11 to 15 km/h. 44% chance of light rain before dawn.
	ThursdayOct 15	71°F22°C	63°F17°C	0.51 in12.9 mm· 80%	88%	Light Rain	W 8 mph12 km/h
DayOvercast and warm, with a high of 71°F22°C and morning low of 66°F19°C. Breezy from the SSW at 7 to 8 mph11 to 13 km/h. 80% chance of light rain in the morning. Humid. NightOvercast, with a low around 63°F17°C. Breezy from the NW at 8 to 12 mph13 to 19 km/h. 70% chance of light rain overnight.
	FridayOct 16	61°F16°C	48°F9°C Feels 43°F6°C	0.06 in1.5 mm· 39%	67%	Showers	NW 14 mph22 km/h
DayMostly cloudy and mild, with a high of 55°F13°C. Windy from the NW at 15 to 16 mph24 to 26 km/h. 13% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 48°F9°C. Breezy from the NW at 12 to 14 mph19 to 23 km/h. 39% chance of showers overnight.
	SaturdayOct 17	57°F14°C	38°F4°C Feels 34°F1°C	0.01 in0.2 mm· 2%	9%	Clear	NNE 6 mph10 km/h
DayMostly clear and mild, with a high of 57°F14°C and morning low of 38°F4°C. Light wind from the NNE around 5 mph8 km/h. Dry air. NightMostly clear, with a low around 39°F4°C. Breezy from the NNE at 7 to 9 mph11 to 15 km/h.
	SundayOct 18	63°F17°C	39°F4°C Feels 34°F1°C	0.01 in0.3 mm· 2%	23%	Clear	SSE 7 mph12 km/h
DayMostly clear and mild, with a high of 63°F17°C and morning low of 39°F4°C. Breezy from the SSE at 7 to 8 mph12 to 13 km/h. Dry air. NightPartly cloudy, with a low around 39°F4°C. Breezy from the SSE at 7 to 8 mph12 to 12 km/h.
	MondayOct 19	68°F20°C	48°F9°C Feels 45°F7°C	0.02 in0.4 mm· 9%	39%	Clear	S 7 mph11 km/h
DayPartly cloudy and mild, with a high of 68°F20°C and morning low of 48°F9°C. Breezy from the S at 7 mph11 km/h. Dry air. NightPartly cloudy, with a low around 49°F9°C. Breezy from the SSE at 7 to 8 mph11 to 13 km/h.
	TuesdayOct 20	70°F21°C	53°F12°C	0.03 in0.7 mm· 8%	37%	Clear	SSE 7 mph11 km/h
DayPartly cloudy and warm, with a high of 70°F21°C and morning low of 53°F12°C. Breezy from the SSE at 6 to 7 mph10 to 11 km/h. NightPartly cloudy, with a low around 53°F12°C. Breezy from the SSE at 7 to 8 mph11 to 12 km/h.
	WednesdayOct 21	71°F22°C	58°F14°C	0.19 in4.8 mm· 23%	61%	Showers	SSE 8 mph13 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 58°F14°C. Breezy from the SSE at 8 to 9 mph14 to 14 km/h. 23% chance of showers in the morning. NightMostly cloudy, with a low around 58°F14°C. Breezy from the SSE at 8 to 9 mph13 to 14 km/h. 22% chance of showers overnight.
	ThursdayOct 22	69°F21°C	60°F15°C	0.28 in7 mm· 35%	67%	Showers	S 9 mph14 km/h
DayMostly cloudy and warm, with a high of 69°F21°C and morning low of 60°F15°C. Breezy from the S at 9 mph14 km/h. 35% chance of showers in the morning. NightMostly cloudy, with a low around 60°F15°C. Breezy from the SSE at 8 to 9 mph14 to 14 km/h. 25% chance of showers overnight.
	FridayOct 23	67°F19°C	56°F14°C	0.24 in6.1 mm· 30%	59%	Showers	SSW 8 mph13 km/h
DayMostly cloudy and mild, with a high of 67°F19°C and morning low of 56°F14°C. Breezy from the SSW at 8 to 9 mph13 to 14 km/h. 29% chance of showers in the morning. NightMostly cloudy, with a low around 57°F14°C. Breezy from the S at 8 to 9 mph13 to 14 km/h. 30% chance of showers overnight.
	SaturdayOct 24	66°F19°C	53°F12°C	0.1 in2.6 mm· 19%	50%	Showers	SW 7 mph11 km/h
DayMostly cloudy and mild, with a high of 66°F19°C and morning low of 53°F12°C. Breezy from the SW at 7 to 8 mph12 to 13 km/h. 13% chance of drizzle in the morning. NightMostly cloudy, with a low around 54°F12°C. Breezy from the SW at 7 to 8 mph11 to 12 km/h. 19% chance of showers overnight.
	SundayOct 25	64°F18°C	52°F11°C	0.13 in3.4 mm· 18%	51%	Showers	W 7 mph11 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 52°F11°C. Breezy from the W at 7 mph11 km/h. 16% chance of showers in the morning. Dry air. NightMostly cloudy, with a low around 52°F11°C. Breezy from the WNW at 7 mph11 km/h. 18% chance of showers overnight.
	MondayOct 26	62°F17°C	51°F10°C	0.13 in3.2 mm· 17%	54%	Showers	W 7 mph11 km/h
DayMostly cloudy and mild, with a high of 62°F17°C and morning low of 51°F10°C. Breezy from the W at 7 mph11 km/h. 17% chance of showers in the morning. Dry air. NightMostly cloudy, with a low around 51°F11°C. Breezy from the W at 7 mph11 km/h. 15% chance of showers overnight.

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