National Weather Station Record at Chicago’s O’Hare for 3-Day Period from May 17 to May 18, 2020

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Foggy conditions Monday morning, May 18, 2020 following heavy rain on Sunday May 17, 2020.

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.
18 23:51 N 12 0.75 Light Drizzle Fog/Mist OVC002 53 51 93% NA NA 29.85 1011.0
18 22:51 N 15 0.75 Light Drizzle Fog/Mist OVC002 53 51 93% NA NA 29.86 1011.1
18 21:51 NE 15 1.00 Fog/Mist OVC003 53 51 93% NA NA 29.86 1011.1
18 20:51 NE 15 1.00 Light Drizzle Fog/Mist OVC003 54 51 90% NA NA 29.84 1010.6
18 19:51 NE 14 0.25 Fog/Mist OVC002 54 52 93% NA NA 29.83 1010.1
18 18:51 NE 15 6.00 Fog/Mist OVC004 56 52 64 56 87% NA NA 29.81 1009.6
18 17:51 N 13 9.00 Overcast OVC006 57 53 87% NA NA 29.80 1009.1
18 16:51 NE 14 10.00 Overcast SCT008 OVC080 59 53 81% NA NA 29.80 1008.9
18 15:51 NE 14 10.00 Mostly Cloudy FEW008 FEW060 BKN080 BKN250 64 55 73% NA NA 29.78 1008.2
18 14:51 NE 10 10.00 Overcast FEW008 FEW050 BKN075 OVC250 63 55 76% NA NA 29.78 1008.2
18 13:51 NE 8 6.00 Overcast with Haze FEW020 SCT060 OVC075 63 55 76% NA NA 29.77 1007.9
18 12:51 NE 9 7.00 Overcast SCT048 OVC060 62 55 64 58 78% NA NA 29.76 1007.6
18 11:51 N 10 6.00 Overcast with Haze FEW006 BKN014 OVC065 60 55 84% NA NA 29.76 1007.4
18 10:51 NE 12 5.00 Overcast with Haze FEW006 BKN011 OVC065 61 56 84% NA NA 29.74 1007.0
18 09:51 SE 7 4.00 Overcast with Haze BKN009 OVC065 62 57 84% NA NA 29.74 1006.8
18 08:51 SE 6 4.00 Fog/Mist BKN005 OVC060 60 57 90% NA NA 29.73 1006.4
18 07:51 S 3 3.00 Fog/Mist BKN004 OVC060 59 56 90% NA NA 29.72 1006.2
18 06:51 S 6 3.00 Fog/Mist BKN004 OVC060 58 56 61 57 93% NA NA 29.70 1005.7 0.01
18 05:51 N 3 3.00 Fog/Mist BKN006 OVC015 58 56 93% NA NA 29.69 1005.1
18 04:51 W 6 10.00 Overcast BKN006 OVC015 59 57 93% NA NA 29.67 1004.6
18 03:51 SW 8 3.00 Fog/Mist OVC003 60 58 93% NA NA 29.66 1004.0 0.01
18 02:51 SW 8 8.00 Overcast OVC004 61 59 93% NA NA 29.66 1004.0
18 01:51 SW 5 9.00 Overcast BKN027 OVC032 61 59 93% NA NA 29.66 1004.1 0.01
18 00:51 W 7 4.00 Light Rain Fog/Mist SCT008 BKN013 OVC021 61 59 65 61 93% NA NA 29.65 1004.0 0.04 0.49
17 23:51 SW 7 3.00 Rain Fog/Mist BKN010 BKN016 OVC021 63 61 93% NA NA 29.66 1004.3 0.11
17 22:51 S 5 6.00 Light Rain Fog/Mist BKN003 OVC011 64 62 93% NA NA 29.67 1004.4 0.01
17 21:51 E 5 9.00 Overcast OVC004 65 63 93% NA NA 29.68 1004.7 0.33
17 20:51 SW 6 8.00 Overcast BKN003 BKN030 OVC100 65 63 93% NA NA 29.67 1004.5 0.09
17 19:51 SE 3 5.00 Rain Fog/Mist SCT003 BKN030 OVC095 65 63 93% NA NA 29.67 1004.5 0.24
17 18:51 SE 5 1.75 Thunderstorm Heavy Rain Fog/Mist OVC011CB 65 63 68 64 93% NA NA 29.67 1004.5 1.28 1.69
17 17:51 E 8 4.00 Rain Fog/Mist BKN008 BKN019 OVC036 66 64 93% NA NA 29.66 1004.2 0.24
17 16:51 SE 12 6.00 Rain Fog/Mist OVC010 67 64 91% NA NA 29.68 1005.0 0.10
17 15:51 S 13 10.00 Light Drizzle BKN009 BKN013 OVC029 68 64 87% NA NA 29.69 1005.1 0.02 0.07
17 14:51 SE 10 6.00 Light Rain Fog/Mist BKN009 OVC015 67 64 91% NA NA 29.71 1006.0 0.04
17 13:51 SE 13 3.00 Light Rain Fog/Mist BKN009 OVC040 67 64 91% NA NA 29.73 1006.5 0.01
17 12:51 SE 10 4.00 Light Rain Fog/Mist OVC005 64 61 64 57 90% NA NA 29.74 1007.0 0.02 0.33
17 11:51 SE 8 4.00 Light Rain Fog/Mist OVC005 62 59 90% NA NA 29.77 1008.1 0.07
17 10:51 SE 10 4.00 Rain Fog/Mist OVC005 60 57 90% NA NA 29.81 1009.5 0.04
17 09:51 SE 13 4.00 Light Rain Fog/Mist OVC005 59 56 90% NA NA 29.82 1009.8 0.10 0.20
17 08:51 E 13 3.00 Rain Fog/Mist OVC005 58 56 93% NA NA 29.83 1010.0 0.07
17 07:51 E 8 3.00 Light Rain Fog/Mist OVC005 57 54 90% NA NA 29.86 1011.0 0.03
17 06:51 E 8 3.00 Light Rain Fog/Mist OVC006 57 54 57 53 90% NA NA 29.87 1011.5 0.13 0.61
17 05:51 E 7 4.00 Rain Fog/Mist OVC011 56 53 90% NA NA 29.89 1012.1 0.08
17 04:51 E 9 9.00 Light Rain OVC015 56 53 90% NA NA 29.90 1012.3 0.05
17 03:51 E 9 8.00 Light Rain OVC017 57 53 87% NA NA 29.92 1013.0 0.04 0.35
17 02:51 E 9 6.00 Light Rain Fog/Mist BKN019 OVC024 57 54 90% NA NA 29.94 1013.6 0.09
17 01:51 NE 5 4.00 Rain Fog/Mist BKN017 OVC024 55 53 93% NA NA 29.97 1014.8 0.22
17 00:51 N 8 3.00 Heavy Rain Fog/Mist BKN037 OVC055 53 50 56 52 89% NA NA 29.99 1015.6 0.34 0.54
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