Current Conditions

Westchester, Illinois

59°F15°C
Partly Cloudy

Wind

ENE 10 mph16 km/h

Humidity

76%

Cloud Cover

76%

As of Wednesday, September 23, 2026 at 1:45 AM CDT

Today's Outlook

Day

Overcast and mild, with a high of 63°F17°C and morning low of 57°F14°C. Breezy from the NE at 11 to 12 mph18 to 19 km/h.

Night

Mostly cloudy, with a low around 58°F14°C. Breezy from the ENE at 8 to 10 mph14 to 16 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
Partly CloudyHigh 63°F17°CLow 57°F14°CPrecip 0.01 in0.2 mm7%Cloud 80%Wind NE 10 mph16 km/hWednesday: Overcast and mild, with a high of 63°F17°C and morning low of 57°F14°C. Breezy from the NE at 11 to 12 mph18 to 19 km/h. Wednesday Night: Mostly cloudy, with a low around 58°F14°C. Breezy from the ENE at 8 to 10 mph14 to 16 km/h.
Partly CloudyHigh 67°F19°CLow 57°F14°CPrecip 0 in0 mmCloud 49%Wind ENE 7 mph11 km/hThursday: Partly cloudy and mild, with a high of 67°F19°C and morning low of 57°F14°C. Breezy from the ENE at 7 to 8 mph12 to 12 km/h. Thursday Night: Mostly cloudy, with a low around 57°F14°C. Breezy from the ENE at 6 to 7 mph10 to 12 km/h.
Partly CloudyHigh 67°F19°CLow 57°F14°CPrecip 0 in0.1 mm8%Cloud 75%Wind ENE 5 mph9 km/hFriday: Mostly cloudy and mild, with a high of 67°F19°C and morning low of 57°F14°C. Breezy from the ENE at 5 to 7 mph8 to 11 km/h. Friday Night: Mostly cloudy, with a low around 58°F14°C. Light wind from the ENE around 5 mph9 km/h.
Partly CloudyHigh 68°F20°CLow 53°F12°CPrecip 0 in0 mmCloud 65%Wind E 5 mph9 km/hSaturday: Mostly cloudy and mild, with a high of 68°F20°C and morning low of 53°F12°C. Light wind from the E around 6 mph9 km/h. Dry air. Saturday Night: Mostly cloudy, with a low around 55°F13°C. Light wind from the ENE around 5 mph9 km/h.
Partly CloudyHigh 70°F21°CLow 54°F12°CPrecip 0.01 in0.2 mm4%Cloud 56%Wind NE 5 mph7 km/hSunday: Mostly cloudy and warm, with a high of 70°F21°C and morning low of 54°F12°C. Light wind from the NE around 5 mph7 km/h. Sunday Night: Mostly cloudy, with a low around 56°F13°C. Light wind from the NE around 5 mph7 km/h.
ClearHigh 72°F22°CLow 54°F12°CPrecip 0 in0 mmCloud 23%Wind NE 4 mph7 km/hMonday: Mostly clear and warm, with a high of 72°F22°C and morning low of 54°F12°C. Light wind from the NE around 4 mph6 km/h. Monday Night: Partly cloudy, with a low around 55°F13°C. Light wind from the NE around 5 mph8 km/h.
Light RainHigh 72°F22°CLow 54°F12°CPrecip 0.08 in2.1 mm27%Cloud 72%Wind SSE 7 mph11 km/hTuesday: Mostly cloudy and warm, with a high of 72°F22°C and morning low of 54°F12°C. Breezy from the SSE at 7 to 8 mph11 to 12 km/h. 16% chance of drizzle around midday. Tuesday Night: Mostly cloudy, with a low around 55°F13°C. Breezy from the SSE at 6 to 8 mph10 to 13 km/h. 27% chance of showers in the evening.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
WednesdaySep 2363°F17°C57°F14°C0.01 in0.2 mm· 7%80%Partly CloudyNE 10 mph16 km/h
ThursdaySep 2467°F19°C57°F14°C0 in0 mm· —49%Partly CloudyENE 7 mph11 km/h
FridaySep 2567°F19°C57°F14°C0 in0.1 mm· 8%75%Partly CloudyENE 5 mph9 km/h
SaturdaySep 2668°F20°C53°F12°C0 in0 mm· —65%Partly CloudyE 5 mph9 km/h
SundaySep 2770°F21°C54°F12°C0.01 in0.2 mm· 4%56%Partly CloudyNE 5 mph7 km/h
MondaySep 2872°F22°C54°F12°C0 in0 mm· —23%ClearNE 4 mph7 km/h
TuesdaySep 2972°F22°C54°F12°C0.08 in2.1 mm· 27%72%Light RainSSE 7 mph11 km/h
WednesdaySep 3068°F20°C60°F16°C0.33 in8.4 mm· 41%80%Light RainS 9 mph14 km/h
ThursdayOct 167°F20°C58°F14°C0.19 in4.9 mm· 27%69%ShowersWSW 9 mph15 km/h
FridayOct 266°F19°C55°F13°C0.14 in3.5 mm· 20%60%ShowersWSW 9 mph14 km/h
SaturdayOct 368°F20°C55°F13°C0.13 in3.2 mm· 26%61%ShowersSW 9 mph14 km/h
SundayOct 466°F19°C55°F13°C0.11 in2.7 mm· 17%55%DrizzleWSW 9 mph15 km/h
MondayOct 564°F18°C51°F11°C0.09 in2.3 mm· 16%49%DrizzleWSW 9 mph14 km/h
TuesdayOct 665°F18°C51°F10°C0.08 in2.1 mm· 17%45%DrizzleWSW 9 mph14 km/h
WednesdayOct 764°F18°C50°F10°C0.06 in1.5 mm· 15%39%DrizzleWNW 9 mph14 km/h

Nearby Cities

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

PatternExampleDescription
/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=11.5Find 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: 41.8506°N, 87.8820°W·Elevation: 194m·Timezone: America/Chicago·Population: 16,729