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Chicago Midway International Airport, Illinois

Large airport in Cook County, Illinois

Air quality

The air at Chicago Midway International Airport

Index 27, good, led by fine particles. Read at 10 PM from its reporting area, Chicago (IL), 5 miles off.

27Good
  • Fine particles (PM2.5)27Good3.1 mi
  • Ozone10Good7 ppb3.1 mi
  • Coarse particles (PM10)-24.4 mi
  • Sulfur dioxide0Good0.5 ppb16.8 mi

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 36, good.

Smoke, the next 45 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Chicago Midway International Airport

0.43 in in the last 24 hours, 0.73 in over the last 3 days, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.43in
Last 3 days
0.73in

Visibility

How far you can see at Chicago Midway International Airport, the next 45 hours

Visibility stays 8 miles or more through Sat 7 PM, lowest 8 miles Thu 11 PM.

FriSat

Airfield

Code
MDW
ICAO
KMDW
IATA
MDW
Field elevation
620 ft
Serves
Chicago
Kind
Large airport
Scheduled service
Yes
Its own instrument
MDW
Wind now
From 290° at 16 mph, read 15 Oct, 22:53

Runways

RunwayLengthWidthSurfaceHeading, trueWind along it nowCrosswind now
04L / 22R5,507 ft150 ftAsphalt44° / 224°7 mph head, on 22R15 mph from the right
04R / 22L6,445 ft150 ftAsphalt and concrete43° / 223°6 mph head, on 22L15 mph from the right
13L / 31R6,522 ft150 ftConcrete134° / 314°15 mph head, on 31R7 mph from the left
13R / 31L3,859 ft60 ftConcrete134° / 314°15 mph head, on 31L7 mph from the left
04L22R04R22L13L31R13R31L2,000 ftN290° 16 mph
Runways from their surveyed ends, north up, lengths and positions to scale; the rose in the corner is the wind now.

Measured here

What the airfield's own instrument measured, the last 24 hours

Every hour from Chicago (MDW), Chicago Midway International Airport's own instrument, measure by measure, on the field's own clock.

Temperature

63 F at 10 PM; 66 F at its warmest, 3 PM, and 60 F at its coolest, 2 AM.

Now
63F
10 PM
Highest
66F
3 PM
Lowest
60F
2 AM
Temperature and Dew point at Chicago, temperature from 60.0 to 66.0, the latest 63.0; dew point from 52.0 to 64.0, the latest 60.5, in degrees Fahrenheit.TEMPERATURE AND DEW POINTF5055606570Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PMTEMPERATUREDEW POINT

How it is measured: Stevenson screen and siting, Field Book FB-INS-009

Humidity and dew point

A dew point of 61 F, the air 92% saturated; the humidity ran from 72% at 12 AM to 99% at 7 PM.

Dew point now
61F
10 PM
Humidity now
92%
Humidity, range
72 to 99%
Relative humidity at Chicago, relative humidity from 72 to 99, the latest 92, in per cent.RELATIVE HUMIDITY%708090100Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PM

How it is measured: Humidity variables, Field Book FB-WAT-002

Wind

15 mph from the west northwest at 10 PM; at its strongest 15 mph, 10 PM, with a gust of 32 mph at 10 PM.

Now
15mph
from the west northwest
Strongest
15mph
10 PM
Highest gust
32mph
10 PM
Wind and Gust at Chicago, wind from 4 to 15, the latest 15; gust from 16 to 32, the latest 32, in miles an hour.WIND AND GUSTmph010203040Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PMWINDGUST
Wind direction at Chicago, wind direction from 80 to 330, the latest 290, in degrees.WIND DIRECTION°090180270360Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PM

How it is measured: Coriolis as geometry, Field Book FB-ENG-008

Pressure

29.79 inHg at 10 PM, rising 0.05 inHg over 3 hours; 0.36 inHg lower than a day before.

Now
29.79inHg
10 PM
3 hours
+0.05inHg
rising
24 hours
-0.36inHg
Pressure, altimeter at Chicago, pressure, altimeter from 29.74 to 30.16, the latest 29.79, in inches of mercury.PRESSURE, ALTIMETERinHg29.6029.8030.0030.20Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PM

How it is measured: Hydrostatic balance, Field Book FB-ENG-003

Visibility

Down to 1 mile at 5 PM; 7 miles now.

Now
7mi
Lowest
1mi
5 PM
Hours under a mile
0
Visibility at Chicago, visibility from 1.0 to 10.0, the latest 7.0, in miles.VISIBILITYmi02.557.510Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PMLIFRIFRMVFRVFR

How it is measured: Fog types, Field Book FB-WAT-020

Cloud base

The lowest cloud base came down to 500 ft at 7 PM; a base was reported in 23 of the hours.

Lowest base now
-
Lowest in 24 hours
500ft
7 PM
Hours with a base reported
23
Lowest cloud base at Chicago, lowest cloud base from 500 to 2,100, the latest 1,000, in feet.LOWEST CLOUD BASEft5001,0001,5002,0002,500Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PMIFRMVFR

How it is measured: Cloud classification, Field Book FB-SKY-001

Precipitation

0.42 in measured in the gauge, the most, 0.30 in, in the hour to 5 PM.

Last 24 hours
0.42in
Wettest hour
0.30in
5 PM
Hours with some
10
Precipitation at Chicago, precipitation from 0.00 to 0.30, the latest trace, in inches.PRECIPITATIONin0.000.100.200.30Oct 153 AM6 AM9 AM12 PM3 PM6 PM9 PM

How it is measured: ASOS, Field Book FB-INS-002

Chicago: every reading, the last 7 days, 30 days and the year, and how well it reports

What is measuring near here

The 5 instruments nearest Chicago Midway International Airport, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.0 miles away.

measured now3 instruments

ChicagoMDW

At an airfield/0.0 mi away/617 ft/3 ft below here

temp, wind, gust, visibility, precip, pressure

measured daily2 instruments

Forest View 1.4 SEIL-CK-113

In a volunteer observer's own ground/0.7 mi away/610 ft/10 ft below here

precip, snowfall, snow depth

Chicago Midway AP 3SWMDWI2

At a cooperative observer's station/3.6 mi away/617 ft/3 ft below here

snowfall, snow depth, precip, high, low

0in

Snow on the ground

Measured at Chicago Midway AP 3SW (MDWI2), 3.6 miles from here, read 14 Oct, 23:58. measured daily

Elsewhere in Illinois

23 places, each with its own forecast and its own instruments.

Near Chicago Midway International Airport

The nearest places, each with its own forecast and the instruments nearest it.

Near Chicago Midway International Airport