Berwyn, IL Weather Forecast

Cook County, Illinois

Conditions now · Mon, 5:53 AM CDT

53°FDewpoint 50°FClear

Measured at KMDW · Chicago/Midway Intl, IL · airport · 4.5 mi away · 48 minutes ago

Berwyn, IL at Mon, 5:53 AM CDT: 53°F and clear, measured at KMDW (Chicago/Midway Intl, IL) 4.5 mi away, 48 minutes ago. Rest of today: high 61°F, low 61°F, 0% chance of precipitation. No active National Weather Service alerts for this location.

Current radarNational Weather Service radar · alerts refresh every minuteOpen live map →

Rain: light → heavyRadar mosaic © Iowa Environmental Mesonet / NWS · Basemap © OpenStreetMap contributors, © Protomaps

Hour by hourTemperatureChance of rain

11 PMClear61°F0%

12 AMClear61°F0%

1 AMClear60°F0%

2 AMClear59°F0%

3 AMClear58°F0%

4 AMClear57°F0%

5 AMClear57°F0%

6 AMClear56°F0%

7 AMMostly sunny56°F0%

8 AMMostly sunny60°F0%

9 AMClear64°F0%

10 AMMostly sunny68°F0%

Seven-day outlook

56–82°F across the week

TodaySep 13Clear · 0% chance of rain61°F / 61°F

MonSep 14Mostly sunny · 3% chance of rain56°F / 74°F

TueSep 15Rain likely · 55% chance of rain69°F / 82°F

WedSep 16Rain likely · 67% chance of rain68°F / 72°F

ThuSep 17Rain likely · 58% chance of rain70°F / 77°F

FriSep 18Scattered rain · 31% chance of rain67°F / 76°F

SatSep 19Scattered rain · 51% chance of rain68°F / 75°F

SunSep 20Scattered rain · 45% chance of rain64°F / 72°F

Forecasts come from the National Weather Service's own computer models, and current conditions from the nearest reporting weather station. Both are served through the weather API. A forecast is guidance, not a warning, and anything the Weather Service has actually issued is on the live map.

About the Berwyn forecast

Berwyn sits at 41.8433°N, 87.7909°W in Cook County, Illinois. The forecast above is drawn for that point from the National Weather Service's own computer models: a seven-day outlook, and a finer-grained one covering the next eighteen hours where it reaches, and the radar and alert panels show what the Weather Service has out over the area right now.

County: Cook County
Coordinates: 41.8433°N, 87.7909°W
Population: 54,414 · 2023 estimate
Land area: 3.904 sq mi

Place data from the US Census Bureau. Coordinates are the Census internal point for Berwyn, and the forecast is for that location, not for every address inside the city limits, and a large city can have real weather differences from one side to the other.

How well can the network see Berwyn?

The nearest Doppler radar is KLOT (Chicago, IL), 22 miles to the SW. A WSR-88D's lowest routine scan sits half a degree above horizontal, and the earth curves away beneath it, so by the time that beam reaches Berwyn its centre is about 1,300 ft above ground. That is about as close as radar coverage gets in the United States: the lowest scan is still near the ground when it reaches Berwyn, so low-level rotation and the leading edge of a gust front show up on it. Berwyn is closer to its radar than 81% of US cities.

The closest instrument actually measuring the air is KMDW · Chicago/Midway Intl on the ASOS/AWOS network, 4.5 miles away. Close enough that its readings are, for practical purposes, the conditions in town.

Beam height is the standard 4/3-earth approximation for the 0.5° scan and assumes normal refraction; it is where the centre of the beam is, not its edges, and unusual temperature profiles bend it. Radar siting from the NWS WSR-88D network, station positions from the Illinois observing network as of this build.

Forecasts near Berwyn

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