Current Conditions

Collinsville, Illinois

69°F20°C

Cloudy

Wind

NNE 7 mph11 km/h

Humidity

64%

Cloud Cover

84%

As of Tuesday, September 22, 2026 at 8:15 PM CDT

Today's Outlook

Night

Mostly cloudy, with a low around 61°F16°C. Breezy from the NNE at 6 to 7 mph10 to 11 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Cloudy	High 69°F20°C	Low 60°F16°C	Precip 0.01 in0.2 mm3%	Cloud 81%	Wind NNE 7 mph11 km/h	Wednesday: Overcast and warm, with a high of 69°F20°C and morning low of 60°F16°C. Breezy from the NNE at 7 to 8 mph12 to 13 km/h. Wednesday Night: Mostly cloudy, with a low around 61°F16°C. Breezy from the NNE at 6 to 7 mph10 to 11 km/h.
Cloudy	High 71°F22°C	Low 60°F16°C	Precip 0 in0 mm—	Cloud 85%	Wind NE 5 mph7 km/h	Thursday: Overcast and warm, with a high of 71°F22°C and morning low of 60°F16°C. Light wind from the NNE around 5 mph8 km/h. Thursday Night: Mostly cloudy, with a low around 61°F16°C. Light wind from the NE around 5 mph7 km/h.
Cloudy	High 76°F25°C	Low 62°F17°C	Precip 0.01 in0.2 mm2%	Cloud 85%	Wind ENE 4 mph7 km/h	Friday: Overcast and warm, with a high of 76°F25°C and morning low of 62°F17°C. Light wind from the ENE around 4 mph7 km/h. Friday Night: Overcast, with a low around 63°F17°C. Light wind from the ENE around 4 mph7 km/h.
Drizzle	High 73°F23°C	Low 62°F16°C	Precip 0.07 in1.8 mm31%	Cloud 87%	Wind E 5 mph7 km/h	Saturday: Overcast and warm, with a high of 73°F23°C and morning low of 62°F16°C. Light wind from the ESE around 4 mph7 km/h. 31% chance of drizzle throughout the day. Saturday Night: Overcast, with a low around 64°F18°C. Light wind from the E around 5 mph8 km/h. 24% chance of drizzle in the evening.
Showers	High 76°F24°C	Low 61°F16°C	Precip 0.09 in2.3 mm31%	Cloud 62%	Wind E 4 mph7 km/h	Sunday: Mostly cloudy and warm, with a high of 76°F24°C and morning low of 61°F16°C. Light wind from the E around 4 mph6 km/h. 31% chance of showers throughout the day. Sunday Night: Mostly cloudy, with a low around 62°F17°C. Light wind from the ENE around 4 mph7 km/h. 30% chance of drizzle throughout the night.
Clear	High 81°F27°C	Low 59°F15°C	Precip 0 in0.1 mm5%	Cloud 31%	Wind ENE 4 mph6 km/h	Monday: Partly cloudy and warm, with a high of 81°F27°C and morning low of 59°F15°C. Light wind from the ENE around 4 mph6 km/h. Monday Night: Partly cloudy, with a low around 61°F16°C. Light wind from the ENE around 4 mph7 km/h.
Light Rain	High 80°F27°C	Low 59°F15°C	Precip 0.15 in3.7 mm31%	Cloud 72%	Wind SSE 7 mph11 km/h	Tuesday: Mostly cloudy and warm, with a high of 80°F27°C and morning low of 59°F15°C. Breezy from the SSE at 7 to 8 mph11 to 13 km/h. 21% chance of light rain throughout the day. Tuesday Night: Mostly cloudy, with a low around 61°F16°C. Breezy from the SE at 6 to 8 mph10 to 13 km/h. 31% chance of light rain in the evening.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 23	69°F20°C	60°F16°C	0.01 in0.2 mm· 3%	81%	Cloudy	NNE 7 mph11 km/h
DayOvercast and warm, with a high of 69°F20°C and morning low of 60°F16°C. Breezy from the NNE at 7 to 8 mph12 to 13 km/h. NightMostly cloudy, with a low around 61°F16°C. Breezy from the NNE at 6 to 7 mph10 to 11 km/h.
	ThursdaySep 24	71°F22°C	60°F16°C	0 in0 mm· —	85%	Cloudy	NE 5 mph7 km/h
DayOvercast and warm, with a high of 71°F22°C and morning low of 60°F16°C. Light wind from the NNE around 5 mph8 km/h. NightMostly cloudy, with a low around 61°F16°C. Light wind from the NE around 5 mph7 km/h.
	FridaySep 25	76°F25°C	62°F17°C	0.01 in0.2 mm· 2%	85%	Cloudy	ENE 4 mph7 km/h
DayOvercast and warm, with a high of 76°F25°C and morning low of 62°F17°C. Light wind from the ENE around 4 mph7 km/h. NightOvercast, with a low around 63°F17°C. Light wind from the ENE around 4 mph7 km/h.
	SaturdaySep 26	73°F23°C	62°F16°C	0.07 in1.8 mm· 31%	87%	Drizzle	E 5 mph7 km/h
DayOvercast and warm, with a high of 73°F23°C and morning low of 62°F16°C. Light wind from the ESE around 4 mph7 km/h. 31% chance of drizzle throughout the day. NightOvercast, with a low around 64°F18°C. Light wind from the E around 5 mph8 km/h. 24% chance of drizzle in the evening.
	SundaySep 27	76°F24°C	61°F16°C	0.09 in2.3 mm· 31%	62%	Showers	E 4 mph7 km/h
DayMostly cloudy and warm, with a high of 76°F24°C and morning low of 61°F16°C. Light wind from the E around 4 mph6 km/h. 31% chance of showers throughout the day. NightMostly cloudy, with a low around 62°F17°C. Light wind from the ENE around 4 mph7 km/h. 30% chance of drizzle throughout the night.
	MondaySep 28	81°F27°C	59°F15°C	0 in0.1 mm· 5%	31%	Clear	ENE 4 mph6 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 59°F15°C. Light wind from the ENE around 4 mph6 km/h. NightPartly cloudy, with a low around 61°F16°C. Light wind from the ENE around 4 mph7 km/h.
	TuesdaySep 29	80°F27°C	59°F15°C	0.15 in3.7 mm· 31%	72%	Light Rain	SSE 7 mph11 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 59°F15°C. Breezy from the SSE at 7 to 8 mph11 to 13 km/h. 21% chance of light rain throughout the day. NightMostly cloudy, with a low around 61°F16°C. Breezy from the SE at 6 to 8 mph10 to 13 km/h. 31% chance of light rain in the evening.
	WednesdaySep 30	75°F24°C	65°F18°C	0.38 in9.7 mm· 41%	79%	Light Rain	SW 8 mph13 km/h
DayOvercast and warm, with a high of 75°F24°C and morning low of 65°F18°C. Breezy from the SW at 8 to 9 mph13 to 14 km/h. 41% chance of light rain throughout the day. NightMostly cloudy, with a low around 66°F19°C. Breezy from the SSW at 7 to 8 mph12 to 13 km/h. 38% chance of light rain throughout the night.
	ThursdayOct 1	74°F23°C	60°F15°C	0.2 in5.2 mm· 27%	56%	Showers	W 7 mph11 km/h
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 60°F15°C. Breezy from the W at 7 to 8 mph12 to 13 km/h. 27% chance of showers throughout the day. NightMostly cloudy, with a low around 62°F17°C. Breezy from the W at 7 mph11 km/h. 23% chance of showers throughout the night.
	FridayOct 2	76°F24°C	58°F14°C	0.13 in3.2 mm· 17%	52%	Showers	SW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 76°F24°C and morning low of 58°F14°C. Breezy from the WSW at 7 mph11 km/h. 15% chance of showers throughout the day. NightMostly cloudy, with a low around 60°F15°C. Light wind from the SSW around 6 mph10 km/h. 17% chance of showers throughout the night.
	SaturdayOct 3	77°F25°C	59°F15°C	0.12 in3.1 mm· 17%	55%	Showers	S 7 mph11 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 59°F15°C. Breezy from the SSW at 7 to 8 mph11 to 13 km/h. 17% chance of drizzle throughout the day. NightMostly cloudy, with a low around 61°F16°C. Breezy from the S at 6 to 7 mph10 to 12 km/h. 17% chance of showers throughout the night.
	SundayOct 4	73°F23°C	58°F15°C	0.16 in4 mm· 19%	52%	Showers	W 7 mph12 km/h
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 58°F15°C. Breezy from the W at 8 to 9 mph13 to 14 km/h. 16% chance of showers throughout the day. NightMostly cloudy, with a low around 61°F16°C. Breezy from the WSW at 7 mph11 km/h. 19% chance of showers throughout the night.
	MondayOct 5	72°F22°C	55°F13°C	0.09 in2.4 mm· 13%	47%	Drizzle	W 7 mph11 km/h
DayPartly cloudy and warm, with a high of 72°F22°C and morning low of 55°F13°C. Breezy from the W at 8 mph12 km/h. 13% chance of drizzle throughout the day. NightPartly cloudy, with a low around 58°F14°C. Breezy from the W at 7 mph11 km/h. 12% chance of drizzle throughout the night.
	TuesdayOct 6	73°F23°C	55°F13°C	0.11 in2.9 mm· 13%	42%	Drizzle	W 7 mph11 km/h
DayPartly cloudy and warm, with a high of 73°F23°C and morning low of 55°F13°C. Breezy from the W at 8 to 9 mph12 to 14 km/h. 13% chance of drizzle throughout the day. NightPartly cloudy, with a low around 57°F14°C. Breezy from the W at 7 mph11 km/h. 13% chance of drizzle throughout the night.
	WednesdayOct 7	72°F22°C	54°F12°C	0.04 in1.1 mm· 11%	38%	Drizzle	NW 7 mph12 km/h
DayPartly cloudy and warm, with a high of 72°F22°C and morning low of 54°F12°C. Breezy from the NW at 8 mph12 km/h. Dry air. NightPartly cloudy, with a low around 56°F13°C. Breezy from the NW at 7 mph11 km/h. 11% chance of drizzle throughout the night.

Nearby Cities

Fairview Heights6 mi9 km O'Fallon7 mi11 km Granite City9 mi15 km East Saint Louis10 mi15 km Edwardsville10 mi16 km Belleville10 mi17 km

About This Forecast

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Coordinates: 38.6703°N, 89.9845°W·Elevation: 171m·Timezone: America/Chicago·Population: 24,754