Current Conditions

Belleville, Illinois

100°F38°C

Hot

Wind

SW 6 mph10 km/h

Humidity

37%

Cloud Cover

23%

As of Wednesday, September 2, 2026 at 1:26 PM CDT

Today's Outlook

Day

Mostly clear and hot, with a high of 101°F38°C and morning low of 78°F26°C. Breezy from the SW at 6 to 7 mph10 to 11 km/h. Heat risk in the afternoon.

Night

Mostly clear, with a low around 88°F31°C. Breezy from the S 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 101°F38°C	Low 78°F26°C	Precip 0 in0 mm—	Cloud 16%	Wind SSW 7 mph11 km/h	Wednesday: Mostly clear and hot, with a high of 101°F38°C and morning low of 78°F26°C. Breezy from the SW at 6 to 7 mph10 to 11 km/h. Heat risk in the afternoon. Wednesday Night: Mostly clear, with a low around 88°F31°C. Breezy from the S at 8 to 9 mph12 to 14 km/h.
Hot	High 101°F39°C	Low 78°F26°C	Precip 0 in0 mm—	Cloud 8%	Wind SSW 7 mph11 km/h	Thursday: Mostly clear and hot, with a high of 101°F39°C and morning low of 78°F26°C. Light wind from the SW around 6 mph10 km/h. Heat risk in the afternoon. Thursday Night: Mostly clear, with a low around 81°F27°C. Breezy from the S at 7 to 8 mph11 to 12 km/h.
Hot	High 101°F39°C	Low 77°F25°C	Precip 0 in0.1 mm6%	Cloud 13%	Wind SSW 4 mph7 km/h	Friday: Mostly clear and hot, with a high of 101°F39°C and morning low of 77°F25°C. Light wind from the SW around 4 mph6 km/h. Heat risk in the afternoon. Friday Night: Mostly clear, with a low around 80°F27°C. Breezy from the SSW at 5 to 7 mph8 to 11 km/h.
Drizzle	High 100°F38°C	Low 79°F26°C	Precip 0.03 in0.8 mm34%	Cloud 37%	Wind ENE 4 mph6 km/h	Saturday: Partly cloudy and hot, with a high of 100°F38°C and morning low of 79°F26°C. Light wind from the NNW around 3 mph5 km/h. 20% chance of drizzle in the afternoon. Heat risk in the afternoon. Saturday Night: Partly cloudy, with a low around 81°F27°C. Light wind from the ESE around 4 mph7 km/h. 34% chance of drizzle in the evening.
Drizzle	High 94°F34°CFeels 98°F37°C	Low 76°F25°C	Precip 0.02 in0.6 mm12%	Cloud 46%	Wind ENE 5 mph9 km/h	Sunday: Partly cloudy and hot, with a high of 94°F34°C and morning low of 76°F25°C. Light wind from the ENE around 5 mph8 km/h. 12% chance of drizzle in the afternoon. Heat risk in the afternoon. Sunday Night: Partly cloudy, with a low around 79°F26°C. Light wind from the ENE around 5 mph9 km/h. 10% chance of drizzle.
Clear	High 94°F34°C	Low 73°F23°C	Precip 0.02 in0.4 mm5%	Cloud 29%	Wind E 6 mph9 km/h	Monday: Partly cloudy and hot, with a high of 94°F34°C and morning low of 73°F23°C. Light wind from the E around 5 mph8 km/h. Monday Night: Partly cloudy, with a low around 76°F24°C. Breezy from the E at 6 to 7 mph10 to 11 km/h.
Hot	High 98°F37°C	Low 72°F22°C	Precip 0 in0.1 mm3%	Cloud 24%	Wind SSE 7 mph11 km/h	Tuesday: Partly cloudy and hot, with a high of 98°F37°C and morning low of 72°F22°C. Breezy from the S at 6 to 8 mph10 to 12 km/h. Heat risk in the afternoon. Tuesday Night: Mostly clear, with a low around 75°F24°C. Breezy from the SSE at 7 to 9 mph12 to 15 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 2	101°F38°C	78°F26°C	0 in0 mm· —	16%	Hot	SSW 7 mph11 km/h
DayMostly clear and hot, with a high of 101°F38°C and morning low of 78°F26°C. Breezy from the SW at 6 to 7 mph10 to 11 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 88°F31°C. Breezy from the S at 8 to 9 mph12 to 14 km/h.
	ThursdaySep 3	101°F39°C	78°F26°C	0 in0 mm· —	8%	Hot	SSW 7 mph11 km/h
DayMostly clear and hot, with a high of 101°F39°C and morning low of 78°F26°C. Light wind from the SW around 6 mph10 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 81°F27°C. Breezy from the S at 7 to 8 mph11 to 12 km/h.
	FridaySep 4	101°F39°C	77°F25°C	0 in0.1 mm· 6%	13%	Hot	SSW 4 mph7 km/h
DayMostly clear and hot, with a high of 101°F39°C and morning low of 77°F25°C. Light wind from the SW around 4 mph6 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 80°F27°C. Breezy from the SSW at 5 to 7 mph8 to 11 km/h.
	SaturdaySep 5	100°F38°C	79°F26°C	0.03 in0.8 mm· 34%	37%	Drizzle	ENE 4 mph6 km/h
DayPartly cloudy and hot, with a high of 100°F38°C and morning low of 79°F26°C. Light wind from the NNW around 3 mph5 km/h. 20% chance of drizzle in the afternoon. Heat risk in the afternoon. NightPartly cloudy, with a low around 81°F27°C. Light wind from the ESE around 4 mph7 km/h. 34% chance of drizzle in the evening.
	SundaySep 6	94°F34°C Feels 98°F37°C	76°F25°C	0.02 in0.6 mm· 12%	46%	Drizzle	ENE 5 mph9 km/h
DayPartly cloudy and hot, with a high of 94°F34°C and morning low of 76°F25°C. Light wind from the ENE around 5 mph8 km/h. 12% chance of drizzle in the afternoon. Heat risk in the afternoon. NightPartly cloudy, with a low around 79°F26°C. Light wind from the ENE around 5 mph9 km/h. 10% chance of drizzle.
	MondaySep 7	94°F34°C	73°F23°C	0.02 in0.4 mm· 5%	29%	Clear	E 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 E around 5 mph8 km/h. NightPartly cloudy, with a low around 76°F24°C. Breezy from the E at 6 to 7 mph10 to 11 km/h.
	TuesdaySep 8	98°F37°C	72°F22°C	0 in0.1 mm· 3%	24%	Hot	SSE 7 mph11 km/h
DayPartly cloudy and hot, with a high of 98°F37°C and morning low of 72°F22°C. Breezy from the S at 6 to 8 mph10 to 12 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 75°F24°C. Breezy from the SSE at 7 to 9 mph12 to 15 km/h.
	WednesdaySep 9	97°F36°C Feels 101°F38°C	78°F26°C	0.01 in0.3 mm· 9%	22%	Hot	SSW 8 mph13 km/h
DayPartly cloudy and hot, with a high of 97°F36°C and morning low of 78°F26°C. Breezy from the SSW at 8 to 9 mph13 to 14 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 80°F27°C. Breezy from the S at 8 to 9 mph13 to 14 km/h.
	ThursdaySep 10	95°F35°C	77°F25°C	0.04 in1.1 mm· 12%	37%	Drizzle	SSW 8 mph12 km/h
DayPartly cloudy and hot, with a high of 95°F35°C and morning low of 77°F25°C. Breezy from the SW at 8 mph12 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 79°F26°C. Breezy from the SSW at 8 mph12 km/h. 12% chance of drizzle in the evening.
	FridaySep 11	93°F34°C	76°F24°C	0.09 in2.3 mm· 14%	40%	Drizzle	SSW 8 mph12 km/h
DayPartly cloudy and hot, with a high of 93°F34°C and morning low of 76°F24°C. Breezy from the SSW at 8 to 9 mph12 to 14 km/h. 11% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 77°F25°C. Breezy from the S at 7 to 8 mph12 to 13 km/h. 14% chance of drizzle throughout the night.
	SaturdaySep 12	90°F32°C	74°F23°C	0.16 in4.1 mm· 20%	50%	Showers	SSW 7 mph12 km/h
DayMostly cloudy and hot, with a high of 90°F32°C and morning low of 74°F23°C. Breezy from the SSW at 7 to 8 mph12 to 13 km/h. 20% chance of showers throughout the day. Humid. NightPartly cloudy, with a low around 76°F25°C. Breezy from the S at 7 to 8 mph12 to 12 km/h. 20% chance of showers throughout the night.
	SundaySep 13	88°F31°C	73°F23°C	0.22 in5.6 mm· 27%	53%	Showers	SSW 8 mph12 km/h
DayMostly cloudy and hot, with a high of 88°F31°C and morning low of 73°F23°C. Breezy from the SSW at 8 to 9 mph13 to 14 km/h. 27% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 75°F24°C. Breezy from the S at 7 to 8 mph12 to 12 km/h. 21% chance of showers throughout the night.
	MondaySep 14	86°F30°C	70°F21°C	0.15 in3.9 mm· 20%	53%	Showers	SSW 7 mph12 km/h
DayMostly cloudy and hot, with a high of 86°F30°C and morning low of 70°F21°C. Breezy from the SSW at 8 mph12 km/h. 19% chance of showers throughout the day. NightMostly cloudy, with a low around 73°F23°C. Breezy from the S at 7 to 8 mph11 to 12 km/h. 20% chance of showers throughout the night.
	TuesdaySep 15	87°F30°C	69°F21°C	0.12 in3 mm· 20%	48%	Showers	S 7 mph11 km/h
DayPartly cloudy and hot, with a high of 87°F30°C and morning low of 69°F21°C. Breezy from the SSW at 7 to 8 mph11 to 12 km/h. 20% chance of showers throughout the day. NightPartly cloudy, with a low around 71°F22°C. Breezy from the S at 7 mph11 km/h. 13% chance of showers throughout the night.
	WednesdaySep 16	84°F29°C	68°F20°C	0.12 in3 mm· 21%	50%	Showers	SSW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 84°F29°C and morning low of 68°F20°C. Breezy from the SSW at 7 to 8 mph11 to 13 km/h. 20% chance of showers throughout the day. NightPartly cloudy, with a low around 70°F21°C. Breezy from the S at 7 mph10 km/h. 21% chance of drizzle throughout the night.

Nearby Cities

Fairview Heights5 mi8 km O'Fallon6 mi10 km Collinsville10 mi17 km East Saint Louis12 mi19 km St. Louis14 mi22 km Granite City15 mi25 km

About This Forecast

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Coordinates: 38.5200°N, 89.9840°W·Elevation: 157m·Timezone: America/Chicago·Population: 42,034