St. Mary's Lake, IL Weather Maps °F °C°F °C Illinois Map Options Temperatures Weather Dew Point Wind Speeds Barometric Pressure Heat Index Wind Chill Temperatures Weather Dew Point Wind Speeds Barometric Pressure Heat Index Wind Chill Humidity UTC Time: 8/29/2026, 18:42 Your Time: St. Mary's Lake, Illinois Hour by Hour Forcast Aeronautical Observation: Automated synoptic observations via NWS Gateway. Auto-refresh in: 5:02 St. Mary's Lake, IL Regional Weather Expires:202608291900;;563211 ASUS43 KLOT 291810 RWRIL ILLINOIS REGIONAL WEATHER ROUNDUP NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 100 PM CDT SAT AUG 29 2026 NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY. * THESE STATIONS ARE NOT UNDER NWS QUALITY CONTROL. THEY ALSO MAY NOT REPORT WEATHER SUCH AS PRECIPITATION OR FOG. ILZ005-006-012>014-019>023-291900- NORTHEAST ILLINOIS CITY SKY/WX TMP DP RH WIND PRES REMARKS CHICAGO-OHARE CLOUDY 78 60 53 SW12 30.11F TC 26 6HR MIN TEMP: 66; 6HR MAX TEMP: 79; CHICAGO-MIDWAY CLOUDY 79 62 56 S13 30.12F HX 80 TC 26 6HR MIN TEMP: 67; 6HR MAX TEMP: 80; AURORA CLOUDY 78 64 61 S9 30.12F HX 80 TC 26 6HR MIN TEMP: 58; 6HR MAX TEMP: 78; JOLIET* PTSUNNY 81 64 56 S9 30.13F HX 82 TC 27 WAUKEGAN PTSUNNY 79 63 57 SW13 30.11F HX 80 TC 26 6HR MIN TEMP: 62; 6HR MAX TEMP: 79; DUPAGE AIRPORT NOT AVBL KANKAKEE* PTSUNNY 81 62 53 SW9 30.15F HX 82 TC 27 WHEELING CLOUDY 79 61 53 SW8 30.13F HX 80 TC 26 6HR MIN TEMP: 62; 6HR MAX TEMP: 79; LANSING* PTSUNNY 80 62 53 SW9 30.14F HX 81 TC 27 NORTHERLY ISL* N/A 79 58 48 S13 N/A HX 80 TC 26 $$ SKY/WX - Weather TMP - Temperature DP - Dew Point RH - HumidityWIND - Wind Direction/Speed PRES - Barometric Pressure VSB - VisibilityWCI - Wind Chill Index E13G22 Wind - East Wind 13 mph/Gusts of 22 mph Illinois Weather Map Illinois Wind Speeds Map Illinois Humidity Map Illinois Barometric Pressure Map
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