Current Conditions

Chicago Heights, Illinois

79°F26°C

Cloudy

Wind

SW 4 mph7 km/h

Humidity

78%

Cloud Cover

58%

As of Wednesday, August 12, 2026 at 8:18 PM CDT

Today's Outlook

Night

Mostly cloudy, with a low around 70°F21°C. Light wind from the ESE around 3 mph6 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Cloudy	High 78°F25°C	Low 70°F21°C	Precip 0.35 in9 mm—	Cloud 84%	Wind ESE 4 mph6 km/h	Thursday: Overcast and warm, with a high of 78°F25°C and morning low of 70°F21°C. Light wind from the ESE around 5 mph7 km/h. Heavy, humid air. Thursday Night: Mostly cloudy, with a low around 70°F21°C. Light wind from the ESE around 3 mph6 km/h.
Cloudy	High 79°F26°C	Low 71°F22°C	Precip 0.34 in8.6 mm—	Cloud 95%	Wind E 5 mph8 km/h	Friday: Overcast and warm, with a high of 79°F26°C and morning low of 71°F22°C. Light wind from the ESE around 5 mph9 km/h. Humid. Friday Night: Overcast, with a low around 71°F22°C. Light wind from the ENE around 5 mph8 km/h.
Cloudy	High 81°F27°CFeels 87°F31°C	Low 72°F22°C	Precip 0.56 in14.3 mm—	Cloud 91%	Wind SSE 6 mph10 km/h	Saturday: Overcast and warm, with a high of 81°F27°C and morning low of 72°F22°C — feels like 88°F31°C. Breezy from the S at 7 mph11 km/h. Heavy, humid air. Saturday Night: Overcast, with a low around 73°F23°C. Light wind from the SSE around 5 mph9 km/h.
Partly Cloudy	High 85°F29°CFeels 92°F33°C	Low 74°F24°C	Precip 0.24 in6 mm—	Cloud 79%	Wind W 7 mph12 km/h	Sunday: Overcast and warm, with a high of 85°F29°C and morning low of 76°F24°C — feels like 91°F33°C. Breezy from the W at 8 mph12 km/h. Heavy, humid air. Sunday Night: Mostly cloudy, with a low around 74°F24°C. Breezy from the W at 7 mph11 km/h.
Partly Cloudy	High 77°F25°C	Low 68°F20°C	Precip 0.09 in2.2 mm—	Cloud 60%	Wind NNE 7 mph11 km/h	Monday: Mostly cloudy and warm, with a high of 77°F25°C and morning low of 70°F21°C. Breezy from the NNE at 8 to 9 mph13 to 14 km/h. Monday Night: Mostly cloudy, with a low around 68°F20°C. Breezy from the NNE at 6 to 8 mph10 to 13 km/h.
Partly Cloudy	High 82°F28°C	Low 63°F17°C	Precip 0 in0.1 mm—	Cloud 51%	Wind SSW 5 mph8 km/h	Tuesday: Mostly cloudy and warm, with a high of 82°F28°C and morning low of 64°F18°C. Light wind from the SW around 5 mph8 km/h. Tuesday Night: Partly cloudy, with a low around 63°F17°C. Breezy from the SSW at 5 to 7 mph8 to 11 km/h.
Partly Cloudy	High 83°F28°CFeels 87°F31°C	Low 70°F21°C	Precip 0.2 in5.1 mm—	Cloud 70%	Wind SSW 8 mph13 km/h	Wednesday: Mostly cloudy and warm, with a high of 83°F28°C and morning low of 70°F21°C. Breezy from the SW at 9 mph14 km/h. Humid. Wednesday Night: Mostly cloudy, with a low around 70°F21°C. Breezy from the SSW at 7 to 8 mph12 to 13 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdayAug 13	78°F25°C	70°F21°C	0.35 in9 mm· —	84%	Cloudy	ESE 4 mph6 km/h
DayOvercast and warm, with a high of 78°F25°C and morning low of 70°F21°C. Light wind from the ESE around 5 mph7 km/h. Heavy, humid air. NightMostly cloudy, with a low around 70°F21°C. Light wind from the ESE around 3 mph6 km/h.
	FridayAug 14	79°F26°C	71°F22°C	0.34 in8.6 mm· —	95%	Cloudy	E 5 mph8 km/h
DayOvercast and warm, with a high of 79°F26°C and morning low of 71°F22°C. Light wind from the ESE around 5 mph9 km/h. Humid. NightOvercast, with a low around 71°F22°C. Light wind from the ENE around 5 mph8 km/h.
	SaturdayAug 15	81°F27°C Feels 87°F31°C	72°F22°C	0.56 in14.3 mm· —	91%	Cloudy	SSE 6 mph10 km/h
DayOvercast and warm, with a high of 81°F27°C and morning low of 72°F22°C — feels like 88°F31°C. Breezy from the S at 7 mph11 km/h. Heavy, humid air. NightOvercast, with a low around 73°F23°C. Light wind from the SSE around 5 mph9 km/h.
	SundayAug 16	85°F29°C Feels 92°F33°C	74°F24°C	0.24 in6 mm· —	79%	Partly Cloudy	W 7 mph12 km/h
DayOvercast and warm, with a high of 85°F29°C and morning low of 76°F24°C — feels like 91°F33°C. Breezy from the W at 8 mph12 km/h. Heavy, humid air. NightMostly cloudy, with a low around 74°F24°C. Breezy from the W at 7 mph11 km/h.
	MondayAug 17	77°F25°C	68°F20°C	0.09 in2.2 mm· —	60%	Partly Cloudy	NNE 7 mph11 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 70°F21°C. Breezy from the NNE at 8 to 9 mph13 to 14 km/h. NightMostly cloudy, with a low around 68°F20°C. Breezy from the NNE at 6 to 8 mph10 to 13 km/h.
	TuesdayAug 18	82°F28°C	63°F17°C	0 in0.1 mm· —	51%	Partly Cloudy	SSW 5 mph8 km/h
DayMostly cloudy and warm, with a high of 82°F28°C and morning low of 64°F18°C. Light wind from the SW around 5 mph8 km/h. NightPartly cloudy, with a low around 63°F17°C. Breezy from the SSW at 5 to 7 mph8 to 11 km/h.
	WednesdayAug 19	83°F28°C Feels 87°F31°C	70°F21°C	0.2 in5.1 mm· —	70%	Partly Cloudy	SSW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 83°F28°C and morning low of 70°F21°C. Breezy from the SW at 9 mph14 km/h. Humid. NightMostly cloudy, with a low around 70°F21°C. Breezy from the SSW at 7 to 8 mph12 to 13 km/h.
	ThursdayAug 20	80°F27°C	69°F21°C	0.08 in2.1 mm· —	53%	Partly Cloudy	NNW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 69°F21°C. Breezy from the NNW at 8 mph12 km/h. Humid. NightPartly cloudy, with a low around 70°F21°C. Breezy from the NNW at 7 mph11 km/h.
	FridayAug 21	80°F26°C	66°F19°C	0.11 in2.7 mm· —	43%	Partly Cloudy	NW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 80°F26°C and morning low of 66°F19°C. Breezy from the WNW at 7 to 8 mph11 to 13 km/h. NightPartly cloudy, with a low around 67°F19°C. Light wind from the NE around 6 mph10 km/h.
	SaturdayAug 22	81°F27°C	66°F19°C	0.04 in1.1 mm· —	42%	Partly Cloudy	SW 6 mph10 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 66°F19°C. Breezy from the WSW at 7 to 8 mph11 to 12 km/h. NightPartly cloudy, with a low around 66°F19°C. Light wind from the SSW around 6 mph10 km/h.
	SundayAug 23	81°F27°C	66°F19°C	0.07 in1.8 mm· —	42%	Partly Cloudy	W 7 mph11 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 66°F19°C. Breezy from the W at 7 to 8 mph12 to 13 km/h. NightPartly cloudy, with a low around 67°F19°C. Light wind from the WSW around 6 mph10 km/h.
	MondayAug 24	80°F27°C	66°F19°C	0.08 in2.1 mm· —	43%	Partly Cloudy	N 7 mph11 km/h
DayPartly cloudy and warm, with a high of 80°F27°C and morning low of 66°F19°C. Breezy from the NNW at 7 to 8 mph12 to 13 km/h. NightPartly cloudy, with a low around 66°F19°C. Light wind from the NNE around 6 mph10 km/h.
	TuesdayAug 25	81°F27°C	65°F18°C	0.05 in1.3 mm· —	39%	Clear	SE 7 mph11 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 65°F18°C. Breezy from the WNW at 7 to 8 mph11 to 13 km/h. NightPartly cloudy, with a low around 66°F19°C. Light wind from the SE around 6 mph10 km/h.
	WednesdayAug 26	81°F27°C	66°F19°C	0.03 in0.8 mm· —	37%	Clear	N 7 mph11 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 66°F19°C. Breezy from the NNW at 7 to 8 mph12 to 13 km/h. NightPartly cloudy, with a low around 66°F19°C. Light wind from the NE around 6 mph10 km/h.
	ThursdayAug 27	80°F27°C	64°F18°C	0.02 in0.6 mm· —	38%	Clear	NE 7 mph11 km/h
DayPartly cloudy and warm, with a high of 80°F27°C and morning low of 64°F18°C. Breezy from the NNE at 7 to 8 mph12 to 13 km/h. NightPartly cloudy, with a low around 65°F18°C. Light wind from the NE around 6 mph10 km/h.

Nearby Cities

Park Forest2 mi4 km Homewood4 mi6 km Matteson4 mi6 km Dyer6 mi10 km Country Club Hills6 mi10 km Lansing6 mi10 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.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 41.5061°N, 87.6356°W·Elevation: 201m·Timezone: America/Chicago·Population: 30,284