| D a t e  | Time (cst)  | Wind (mph)  | Vis. (mi.)  | Weather | Sky Cond. | Temperature (ºF) | Relative Humidity  | Wind Chill (°F)  | Heat Index (°F)  | Pressure | Precipitation (in.) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air | Dwpt | 6 hour | altimeter (in)  | sea level (mb)  | 1 hr | 3 hr | 6 hr | ||||||||||
| Max. | |||||||||||||||||
| 04 | 23:51 | W 17 G 28 | 10.00 | Partly Cloudy | SCT029 | 8 | -1 | 10 | 8 | 66% | -10 | NA | 30.08 | 1020.3 | |||
| 04 | 22:51 | W 16 G 28 | 10.00 | Partly Cloudy | SCT028 | 8 | -1 | 66% | -10 | NA | 30.11 | 1021.1 | |||||
| 04 | 21:51 | W 15 G 23 | 10.00 | A Few Clouds | FEW029 | 8 | -2 | 63% | -9 | NA | 30.12 | 1021.6 | |||||
| 04 | 20:51 | W 14 G 29 | 10.00 | Partly Cloudy | FEW020 SCT028 | 8 | -2 | 63% | -9 | NA | 30.12 | 1021.7 | |||||
| 04 | 19:51 | W 12 G 25 | 10.00 | Light Snow | BKN030 | 9 | -1 | 64% | -6 | NA | 30.12 | 1021.6 | |||||
| 04 | 18:51 | W 13 G 25 | 10.00 | A Few Clouds | FEW028 | 9 | -2 | 61% | -7 | NA | 30.12 | 1021.8 | |||||
| 04 | 17:51 | W 14 G 25 | 10.00 | Partly Cloudy | SCT028 | 10 | -1 | 12 | 7 | 61% | -6 | NA | 30.12 | 1021.7 | |||
| 04 | 16:51 | W 21 G 31 | 10.00 | Partly Cloudy and Breezy | SCT030 | 11 | -1 | 58% | -8 | NA | 30.12 | 1021.7 | |||||
| 04 | 15:51 | W 14 G 29 | 10.00 | Partly Cloudy | SCT031 | 12 | -1 | 56% | -4 | NA | 30.13 | 1022.0 | |||||
| 04 | 14:51 | W 17 G 25 | 10.00 | Partly Cloudy | SCT032 | 12 | -2 | 53% | -5 | NA | 30.14 | 1022.3 | |||||
| 04 | 13:51 | W 22 G 29 | 10.00 | Partly Cloudy and Breezy | SCT030 | 10 | -4 | 53% | -10 | NA | 30.15 | 1022.5 | |||||
| 04 | 12:51 | W 15 G 26 | 10.00 | Mostly Cloudy | BKN030 | 10 | -5 | 50% | -7 | NA | 30.17 | 1023.2 | |||||
| 04 | 11:51 | SW 16 G 25 | 10.00 | Mostly Cloudy | BKN031 | 7 | -6 | 7 | -3 | 55% | -11 | NA | 30.20 | 1024.5 | |||
| 04 | 10:51 | W 20 G 28 | 10.00 | Partly Cloudy | SCT030 | 5 | -8 | 54% | -15 | NA | 30.22 | 1024.8 | |||||
| 04 | 09:51 | W 17 G 25 | 10.00 | A Few Clouds | FEW017 | 2 | -10 | 57% | -18 | NA | 30.22 | 1024.8 | |||||
| 04 | 08:51 | W 15 G 24 | 10.00 | A Few Clouds | FEW017 | -0 | -10 | 62% | -19 | NA | 30.22 | 1025.0 | |||||
| 04 | 07:51 | W 12 G 22 | 10.00 | A Few Clouds | FEW017 | -2 | -11 | 65% | -20 | NA | 30.21 | 1024.7 | |||||
| 04 | 06:51 | W 15 | 7.00 | A Few Clouds | FEW020 | -3 | -11 | 68% | -23 | NA | 30.20 | 1024.2 | |||||
| 04 | 05:51 | W 12 | 6.00 | A Few Clouds with Haze | FEW018 | -3 | -11 | 3 | -3 | 68% | -21 | NA | 30.20 | 1024.4 | |||
| 04 | 04:51 | W 10 | 10.00 | A Few Clouds | FEW015 | -3 | -11 | 68% | -20 | NA | 30.21 | 1024.5 | |||||
| 04 | 03:51 | W 13 | 10.00 | Fair | CLR | -2 | -11 | 65% | -21 | NA | 30.21 | 1024.3 | |||||
| 04 | 02:51 | NW 15 | 10.00 | Fair | CLR | -2 | -10 | 68% | -22 | NA | 30.20 | 1024.0 | |||||
| 04 | 01:51 | NW 13 G 23 | 10.00 | Fair | CLR | -0 | -9 | 65% | -18 | NA | 30.20 | 1024.2 | |||||
| 04 | 00:51 | W 13 | 10.00 | Fair | CLR | 2 | -8 | 63% | -16 | NA | 30.21 | 1024.5 | 
Another unpleasant, cold day as part of this winter season. Chicago's official high temperature of 12°F broke a 129 year-old record that smashed the previous record low high temperature of 17°F.
CHICAGO O'HARE CURRENT AND HISTORY (3-DAY) ... | NWS Chicago Office OBSERVED WEATHER REPORTS
FORECAST:
Chicago Weather Forecast
Chicago Weather Radar
| Twitter group from National Weather Service Chicago, Local Chicago Media, and The Weather Channel. | 
If you think the unseasonable cold is becoming unreasonable, there is a glimmer of hope in @NWSCPC's 6-10 & 8-14 day outlooks. They focus the heart of the cold air farther west, but do strongly suggest we will get into a much stormier/wetter pattern Mar 4-18th. pic.twitter.com/rSJl49BjHg— NWS Chicago (@NWSChicago) March 5, 2019
Chicago's high of 12 degrees today broke a 129 year old record for the coldest high temp ever on March 4, which previously had been 17 degrees set way back in 1890. There have only been 4 March days on record with a colder high than today, most recently way back on 3/2/1943!— NWS Chicago (@NWSChicago) March 5, 2019
Rockford's high of 10 degrees broke the previous record coldest high for March 4th, which had been 14 set back in 2002. The high of 10 above was 1 degree shy of tying the all time record coldest high for March, which is 9 above set back on March 2, 2014!— NWS Chicago (@NWSChicago) March 5, 2019
Unseasonable cold will continue thru Thu. Reinforcing shot late tonight-Tue AM accompanied by a period of snow showers could produce a coating of snow in spots, reduced visibility & patchy slick roads. Accumulating snow psbl Thu-Thu. night, highest chances south. #ilwx #inwx pic.twitter.com/HVfVZ6Qwni— NWS Chicago (@NWSChicago) March 4, 2019
Here are the lowest temperatures and wind chills for March 4. pic.twitter.com/Tmy5dHBeDO— NWS Chicago (@NWSChicago) March 4, 2019
Be weather-ready and bundle up this morning!— NWS Chicago (@NWSChicago) March 4, 2019
A look at 5:30 a.m. temps and wind chills this morning on March…yes March…the 4th. Widespread subzero temperatures will continue through 9 a.m. with wind chills -15° to -25° below.https://t.co/hvAEYCJelM#ILwx #INwx pic.twitter.com/wQrVWqQbTK
Chicago (O'Hare) is presently -3°. This is the coldest observed March temperature in Chicago since March 4, 2002 (-7°). #ILwx #BRRR— NWS Chicago (@NWSChicago) March 4, 2019
A frigid start to today by March standards will likely result in daily record cold highs this afternoon, with highs only in the lower to mid teens. Wind chills will remain below 0° for most locations today. Scattered snow showers overnight into early Tuesday a.m. #ILwx #INwx pic.twitter.com/6VLYWz499k— NWS Chicago (@NWSChicago) March 4, 2019
Unseasonable cold continues through late this week. pic.twitter.com/t90g8VQsAo— NWS Chicago (@NWSChicago) March 4, 2019
Early this morning of January 4th...check that, March 4th...finds almost all of northern Illinois including Chicago below zero. Here is some perspective for this unseasonable cold in #Chicago. #ILwx #INwx pic.twitter.com/d2HpGBGB4L— NWS Chicago (@NWSChicago) March 4, 2019
Finally, we have to deal with the bone-chilling cold. Plus more snow is on the way this week! How the next two storms could blanket areas heading into the weekend. We have a jammed packed #WUTV show. Tweet us your questions as we break down the week ahead! pic.twitter.com/OqTnFhJh4Q— Weather Underground (@wunderground) March 4, 2019
CLIMATE DATA FROM THE NATIONAL WEATHER SERVICE CHICAGO OFFICE ...
+ + + +
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1233 AM CST TUE MAR 5 2019
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR MARCH 4 2019...
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2019
WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         12    421 PM  73    1983  42    -30       46
  MINIMUM         -3    727 AM -12    1873  26    -29       32
  AVERAGE          5                        34    -29       39
PRECIPITATION (IN)
  YESTERDAY        T             1.75 1985   0.08  -0.08     0.00
  MONTH TO DATE    T                         0.31  -0.31     0.81
  SINCE MAR 1      T                         0.31  -0.31     0.81
  SINCE JAN 1      4.77                      3.83   0.94     6.99
SNOWFALL (IN)
  YESTERDAY        T             8.5  1982   0.3   -0.3      0.0
  MONTH TO DATE    T                         1.0   -1.0      0.0
  SINCE MAR 1      T                         1.0   -1.0      0.0
  SINCE JUL 1     41.3                      30.5   10.8     30.3
  SNOW DEPTH       0
DEGREE DAYS
 HEATING
  YESTERDAY       60                        31     29       26
  MONTH TO DATE  183                       128     55      104
  SINCE MAR 1    183                       128     55      104
  SINCE JUL 1   4974                      4862    112     4562
 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE MAR 1      0                         0      0        0
  SINCE JAN 1      0                         0      0        0
..................................................................
WIND (MPH)
  HIGHEST WIND SPEED    22   HIGHEST WIND DIRECTION     W (250)
  HIGHEST GUST SPEED    33   HIGHEST GUST DIRECTION    SW (230)
  AVERAGE WIND SPEED    14.9
SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT SNOW
  HAZE
RELATIVE HUMIDITY (PERCENT)
 HIGHEST    71           300 AM
 LOWEST     50           100 PM
 AVERAGE    61
..........................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   42        75      1983
 MINIMUM TEMPERATURE (F)   26         0      1978
                                             1873
SUNRISE AND SUNSET
MARCH  5 2019.........SUNRISE   621 AM CST   SUNSET   546 PM CST
MARCH  6 2019.........SUNRISE   619 AM CST   SUNSET   547 PM CST
-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.
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HOMETOWN WEATHER: Arlington Heights Weather Forecast -- Arlingtoncardinal.com/weather
LIVE RADAR | STORM TRACKS | CLOUDS INFRARED SAT | CLOUDS VISIBLE SAT (during daylight)
WunderMap® US Temperature/Wind Data || WunderMap®: O'Hare Temps | NE Illinois Temps
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SUNLIGHT DATA FOR SECURITY, TRAFFIC SAFETY, AND SPORTS
SunCalc.net data with azimuth & trajectory, times for dawn, sunrise, solar noon, sunset, dusk ...



















