325
ASUS43 KLOT 181610
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1100 AM 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.
ILZ001-002-007-009-015-016-024-181700-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE CLOUDY 70 63 78 VRB3 29.76R TC 21
STERLING* CLOUDY 70 66 87 SE9G16 29.79R TC 21
SAVANNA* CLOUDY 71 63 76 S3 29.79R TC 22
ILZ003-004-008-010-011-017-018-181700-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD CLOUDY 69 65 86 SE10 29.79F TC 21
FREEPORT* CLOUDY 71 69 94 SE7 29.80R TC 21
ROCHELLE* PTSUNNY 69 65 89 SE15 29.78F TC 20
DE KALB* CLOUDY 67 67 98 S10 29.80F TC 20
PERU* PTSUNNY 70 66 88 SE15G22 29.76F TC 21
ILZ005-006-012>014-019>023-181700-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE TSTM 73 66 78 SW30G39 29.87R VSB 1 TC 23
CHICAGO-MIDWAY TSTM 70 66 87 SW23G79 29.86R VSB 1/2 TC 21
AURORA LGT RAIN 67 66 97 E6 29.79F FOG TC 19
JOLIET* RAIN 70 69 98 W8G20 29.87R TC 21
WAUKEGAN MOSUNNY 75 66 73 SW16 29.82S TC 24
DUPAGE AIRPORT TSTM 69 68 96 S10 29.84S FOG TC 21
KANKAKEE* HVY RAIN 68 65 91 W29G58 29.94R VSB 1 TC 20
WHEELING LGT RAIN 74 67 78 SW8G17 29.84F TC 23
MORRIS* TSTM 68 66 94 W5 29.84R TC 20
ROMEOVILLE* TSTM 72 70 94 SW17G35 29.88R FOG TC 22
LANSING* CLOUDY 80 67 64 S15G24 29.85F HX 82 TC 26
NORTHERLY ISL* N/A 77 64 64 S3 N/A TC 25
LMZ740>746-181700-
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 1017.0 2/ 4
WAUKEGAN HARBOR 66 51 210/ 12/ 17 1010.9 2/ 3
WILMETTE BUOY 67 210/ 10/ 16 1012.1F 1/ 3
CHICAGO BUOY 66 54 200/ 6/ 8 1009.4 1/ 3
HARRISON CRIB 75 200/ 18/ 20 N/A
NORTHERLY ISL 76 190/ 11/ 19 N/A
CALUMET HARBOR 78 180/ 6/ 10 1011.0F
BURNS HARBOR 79 200/ 12/ 17 1011.9F
MICHIGAN CITY 81 180/ 17/ 24 1009.8F
ST. JOSEPH BUOY 65 190/ 10/ 12 1012.4F 2/ 3
ILZ025>027-034>036-040-047-049-050-058-095>099-181700-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY RAIN 64 62 93 S13 29.92R TC 18
GALESBURG* CLOUDY 68 62 80 S10G17 29.80R TC 20
MACOMB* CLOUDY 68 64 85 S30G36 29.79R TC 20
JACKSONVILLE* CLOUDY 64 64 100 CALM 29.95R TC 18
PITTSFIELD* CLOUDY 65 64 99 S5 29.97R TC 18
ILZ028>032-037-038-041>044-048-051>054-059>061-181700-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
PONTIAC LGT RAIN 65 65 100 MISG 29.89F TC 19
BLOOMINGTON LGT RAIN 66 66 100 SE5 29.94F TC 19
DECATUR PTSUNNY 66 64 93 NE3 29.97F TC 19
PEORIA NOT AVBL
LACON* CLOUDY 67 63 89 SE12 29.78F TC 19
LINCOLN* LGT RAIN 67 67 100 SE3 29.93F TC 19
SPRINGFIELD LGT RAIN 67 64 90 SE7 29.95R TC 19
TAYLORVILLE CLOUDY 64 64 100 CALM 29.98F TC 18
ILZ033-039-045-046-055>057-062-063-181700-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN TSTM 66 65 96 W16 30.00R FOG TC 19
DANVILLE* N/A 73 70 90 S12G17 29.97R TC 23
RANTOUL* LGT RAIN 67 65 94 W9 29.98R TC 19
MATTOON PTSUNNY 75 69 81 S10G22 29.97R TC 24
PARIS* TSTM 69 67 92 SW9G26 29.99R TC 21
ILZ079-100>102-181700-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON PTSUNNY 66 64 94 E10 29.98S THUNDER TC 19
BELLEVILLE LGT RAIN 70 66 88 CALM 29.96R TC 21
CAHOKIA* CLOUDY 67 66 97 N8 29.98S TC 19
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-181700-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE PTSUNNY 80 70 71 S15G30 29.99S HX 83 TC 27
CAIRO* PTSUNNY 84 70 63 S13G18 30.02S HX 88 TC 29
EFFINGHAM* RAIN 70 70 100 S10G17 30.01R TC 21
MARION PTSUNNY 81 72 74 S16G26 30.00S HX 84 TC 27
MT. VERNON TSTM 75 72 88 SW12G23 29.99S TC 24
CENTRALIA* TSTM 73 72 95 S12G17 29.98R TC 23
SALEM* TSTM 71 71 100 S9 29.98F TC 22
METROPOLIS* PTSUNNY 83 69 64 S7 30.04R HX 86 TC 28
ILZ067-068-072-073-078-083-087-091-181700-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE PTSUNNY 85 69 58 S24G33 29.99S HX 89 TC 29
FLORA* RAIN 70 66 88 SW6 29.99S TC 21
FAIRFIELD* CLOUDY 79 67 67 S15G22 29.99R HX 81 TC 26
HARRISBURG* CLOUDY 81 69 66 SW12G18 30.01S HX 84 TC 27
ROBINSON* PTSUNNY 82 70 65 S17G24 29.97S HX 86 TC 28
ABBREVIATIONS USED IN REMARKS
TC - TEMPERATURE IN CELSIUS
WCI - WIND CHILL INDEX
HX - HEAT INDEX
VSB - VISIBILITY
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