670
ASUS43 KLOT 181706
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1200 PM CDT MON MAY 18 2026
NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR S TO VISIBILITY.
* THESE STATIONS ARE NOT UNDER NWS QUALITY CONTROL. THEY ALSO MAY NOT
REPORT WEATHER SUCH AS PRECIPITATION OR FOG.
ILZ001-002-007-009-015-016-024-181800-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE CLOUDY 74 63 68 SW15 29.81R TC 23
STERLING* CLOUDY 76 65 68 VRB6 29.81R TC 24
SAVANNA* CLOUDY 74 64 72 SW8 29.82R TC 23
ILZ003-004-008-010-011-017-018-181800-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD CLOUDY 74 66 76 S8 29.82R TC 23
FREEPORT* CLOUDY 74 68 79 S8G17 29.83S TC 24
ROCHELLE* PTSUNNY 74 63 69 S12 29.82R TC 23
DE KALB* MOSUNNY 71 66 83 S8 29.82R TC 22
PERU* PTSUNNY 73 66 78 S14 29.81R TC 23
ILZ005-006-012>014-019>023-181800-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE CLOUDY 70 68 93 SE8 29.79F TC 21
CHICAGO-MIDWAY CLOUDY 69 67 93 SE9 29.81F TC 21
AURORA CLOUDY 69 66 90 CALM 29.82R TC 21
JOLIET* MOSUNNY 70 69 96 SE7 29.81F TC 21
WAUKEGAN RAIN 70 68 93 S10 29.77F FOG TC 21
DUPAGE AIRPORT PTSUNNY 70 68 93 CALM 29.80R TC 21
KANKAKEE* LGT RAIN 67 65 94 S12 29.87F TC 20
WHEELING MOSUNNY 68 66 93 VRB3 29.80F TC 20
MORRIS* MOSUNNY 70 66 88 SE14 29.79F TC 21
ROMEOVILLE* PTSUNNY 70 70 100 SE14 29.81F TC 21
LANSING* RAIN 66 65 96 S6 29.86F TC 19
NORTHERLY ISL* N/A 65 63 93 SE5 N/A TC 18
LMZ740>746-181800-
SOUTHERN LAKE MICHIGAN
STATION/POSITION SKY/WX TEMP WIND PRES VSBY WAVE
AIR SEA DIR/SP/G HT/PER
(F) (DEG/KT/KT) (MB) (MI) (FT/S)
WINTHROP HARBOR 49 1014.4F 1/ 3
WAUKEGAN HARBOR 62 51 140/ 14/ 19 1009.4F 2/ 4
WILMETTE BUOY 65 240/ 12/ 21 1012.2R 1/ 3
CHICAGO BUOY 61 54 1009.4F 1/ 2
HARRISON CRIB 66 210/ 11/ 12 N/A
NORTHERLY ISL 66 290/ 10/ 16 N/A
CALUMET HARBOR 68 230/ 5/ 10 1011.3
BURNS HARBOR 65 230/ 9/ 29 1013.2R
MICHIGAN CITY 81 180/ 19/ 22 1009.6F
ST. JOSEPH BUOY 67 190/ 12/ 14 1012.1F 2/ 3
ILZ025>027-034>036-040-047-049-050-058-095>099-181800-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY LGT RAIN 65 63 93 S22G35 29.86F TC 18
GALESBURG* CLOUDY 71 63 76 SW13 29.83R TC 22
MACOMB* CLOUDY 71 64 79 S24G31 29.81R TC 22
JACKSONVILLE* CLOUDY N/A N/A N/A S12 29.98R
PITTSFIELD* CLOUDY 65 65 98 SE7 29.97S TC 19
ILZ028>032-037-038-041>044-048-051>054-059>061-181800-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
PONTIAC MOSUNNY 67 67 100 MISG 29.86R TC 19
BLOOMINGTON PTSUNNY 67 67 100 S23G30 29.90F TC 19
DECATUR PTSUNNY 67 66 97 SE5 29.98R TC 19
PEORIA NOT AVBL
LACON* CLOUDY 71 64 77 SW5 29.81R TC 22
LINCOLN* LGT RAIN 68 68 100 S14 29.92F TC 20
SPRINGFIELD LGT RAIN 67 65 93 S12 29.96R TC 19
TAYLORVILLE CLOUDY 66 64 94 SE5 30.00R TC 19
ILZ033-039-045-046-055>057-062-063-181800-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN LGT RAIN 67 65 93 S3 29.97F TC 19
DANVILLE* CLOUDY 68 66 93 SW7 30.00R TC 20
RANTOUL* LGT RAIN 66 65 95 NW5 29.93F TC 19
MATTOON RAIN 67 65 93 N7 30.00 FOG TC 19
PARIS* TSTM 68 67 98 SW15G33 30.02R TC 20
ILZ079-100>102-181800-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON TSTM 66 64 94 E3 29.98S TC 19
BELLEVILLE TSTM 68 68 100 N9 29.98R VSB 3/8 TC 20
CAHOKIA* TSTM 67 65 93 N6 29.98F FOG TC 19
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-181800-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE MOSUNNY 79 73 83 SW12 30.00R HX 82 TC 26
CAIRO* CLOUDY 85 69 58 SW14G21 30.03R HX 89 TC 30
EFFINGHAM* HVY RAIN 67 67 100 CALM 30.02F VSB 1/2 TC 19
MARION CLOUDY 81 72 74 SW12 30.01R HX 84 TC 27
MT. VERNON PTSUNNY 80 72 76 S16 29.99S HX 84 TC 27
CENTRALIA* CLOUDY 74 73 96 CALM 30.00R TC 23
SALEM* CLOUDY 69 69 100 N13 30.02R TC 21
METROPOLIS* PTSUNNY 86 70 59 S9G17 30.04S HX 90 TC 30
ILZ067-068-072-073-078-083-087-091-181800-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
FLORA* CLOUDY 70 68 94 NW8 30.01R TC 21
FAIRFIELD* TSTM 78 68 72 S16G23 30.00R HX 80 TC 25
HARRISBURG* CLOUDY 83 71 66 S13G20 30.01F HX 87 TC 28
ROBINSON* RAIN 75 72 88 W12 29.99R FOG TC 24
ABBREVIATIONS USED IN REMARKS
TC - TEMPERATURE IN CELSIUS
WCI - WIND CHILL INDEX
HX - HEAT INDEX
VSB - VISIBILITY
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