THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 563 IN EFFECT UNTIL 2 PM CDT /3 PM EDT/ THIS AFTERNOON FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 18 COUNTIES IN CENTRAL ILLINOIS LIVINGSTON IN EAST CENTRAL ILLINOIS FORD IROQUOIS IN NORTH CENTRAL ILLINOIS BOONE DE KALB LA SALLE LEE OGLE WINNEBAGO IN NORTHEAST ILLINOIS COOK DUPAGE GRUNDY KANE KANKAKEE KENDALL LAKE IL MCHENRY WILL IN INDIANA THIS WATCH INCLUDES 5 COUNTIES IN NORTHWEST INDIANA BENTON JASPER LAKE IN NEWTON PORTER THIS INCLUDES THE CITIES OF ALGONQUIN, AURORA, BELVIDERE, BOLINGBROOK, BOURBONNAIS, BUFFALO GROVE, BYRON, CAROL STREAM, CHESTERTON, CHICAGO, COAL CITY, CRYSTAL LAKE, DEKALB, DEMOTTE, DIXON, DOWNERS GROVE, DWIGHT, ELGIN, EVANSTON, FAIRBURY, FOWLER, GARY, GIBSON CITY, GILMAN, GURNEE, HAMMOND, JOLIET, KANKAKEE, KENTLAND, LA SALLE, LEMONT, LOMBARD, MARSEILLES, MCHENRY, MENDOTA, MERRILLVILLE, MINOOKA, MOROCCO, MORRIS, MUNDELEIN, NAPERVILLE, OAK LAWN, OREGON, ORLAND PARK, OSWEGO, OTTAWA, OXFORD, PARK FOREST, PAXTON, PLANO, PONTIAC, PORTAGE, RENSSELAER, ROCHELLE, ROCKFORD, ROSELAWN, SCHAUMBURG, STREATOR, SYCAMORE, VALPARAISO, WATSEKA, WAUKEGAN, WHEATON, WILMINGTON, WOODSTOCK, AND YORKVILLE.
Weather in Fontana, WI
Updated 2026-08-11 12:45 local time · ZIP codes 53125
Sunny
Active alerts
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Boone County in north central Illinois... De Kalb County in north central Illinois... Northern La Salle County in north central Illinois... Lee County in north central Illinois... Ogle County in north central Illinois... Southern Winnebago County in north central Illinois... * WHEN...Until 130 PM CDT. * IMPACTS...Creeks and streams may rise out of their banks. Roads and streets may be flooded. * ADDITIONAL DETAILS... - At 931 AM CDT, Doppler radar and automated rain gauges indicated a line of intense thunderstorms with rainfall rates of 2 to 3 inches per hour moving through the area. Localized flooding of roadways and poor drainage areas will occur shortly after the onset of rainfall. - Some locations that will experience flooding include... Rockford, DeKalb, Belvidere, Loves Park, Machesney Park, Ottawa, Sycamore, Dixon, Rochelle, Sandwich, Mendota, Poplar Grove, Genoa, Byron, Oregon, Mount Morris, Amboy, Polo and Sheridan. - http://www.weather.gov/safety/flood
Safety instructions
A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters.
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Northern Grundy County in northeastern Illinois... Kane County in northeastern Illinois... Kendall County in northeastern Illinois... * WHEN...Until 200 PM CDT. * IMPACTS...Flooding may occur in poor drainage and urban areas. Roads and streets may be flooded. * ADDITIONAL DETAILS... - At 959 AM CDT, Doppler radar and automated rain gauges indicated a line of intense thunderstorms with rainfall rates of 1 to 2 inches per hour moving into the area. Localized flooding of roadways and poor drainage areas will occur slightly after the onset of rainfall. - Some locations that will experience flooding include... Aurora, Elgin, Carpentersville, St. Charles, Oswego, Algonquin, Batavia, Huntley, Geneva, Yorkville, Morris, Channahon, Campton Hills, Minooka and Plano. - http://www.weather.gov/safety/flood
Safety instructions
A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters.
SEVERE THUNDERSTORM WATCH 563 REMAINS VALID UNTIL 2 PM CDT THIS AFTERNOON FOR THE FOLLOWING AREAS IN WISCONSIN THIS WATCH INCLUDES 9 COUNTIES IN SOUTH CENTRAL WISCONSIN DANE GREEN ROCK IN SOUTHEAST WISCONSIN JEFFERSON KENOSHA MILWAUKEE RACINE WALWORTH WAUKESHA THIS INCLUDES THE CITIES OF BELOIT, BRODHEAD, BROOKFIELD, DELAVAN, EAST TROY, ELKHORN, FORT ATKINSON, JANESVILLE, JEFFERSON, KENOSHA, LAKE GENEVA, MADISON, MENOMONEE FALLS, MILWAUKEE, MONROE, MUSKEGO, NEW BERLIN, RACINE, WATERTOWN, WAUKESHA, AND WHITEWATER.
THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 563 IN EFFECT UNTIL 2 PM CDT THIS AFTERNOON FOR THE FOLLOWING AREAS IN WISCONSIN THIS WATCH INCLUDES 12 COUNTIES IN SOUTH CENTRAL WISCONSIN DANE GREEN IOWA LAFAYETTE ROCK SAUK IN SOUTHEAST WISCONSIN JEFFERSON KENOSHA MILWAUKEE RACINE WALWORTH WAUKESHA THIS INCLUDES THE CITIES OF ARGYLE, BARABOO, BARNEVELD, BELMONT, BELOIT, BENTON, BLANCHARDVILLE, BRODHEAD, BROOKFIELD, DARLINGTON, DELAVAN, DODGEVILLE, EAST TROY, ELKHORN, FORT ATKINSON, JANESVILLE, JEFFERSON, KENOSHA, LAKE GENEVA, MADISON, MENOMONEE FALLS, MILWAUKEE, MINERAL POINT, MONROE, MUSKEGO, NEW BERLIN, PRAIRIE DU SAC, RACINE, REEDSBURG, SAUK CITY, SHULLSBURG, WATERTOWN, WAUKESHA, AND WHITEWATER.
Next hours
69°23% rain77°11% rain80°10% rain82°9% rain81°9% rain80°8% rain77°9% rain74°11% rain
72°12% rain71°14% rain
71°15% rain70°15% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Weather insights for today
There is a moderate rain chance, peaking near 35%.
It feels like 69°F with winds near 3 mph.
74°F, 11% rain chance and 3 mph wind.
Visibility is around 10 mi; gusts may reach 14 mph.
Current temperature is 69°F, wind 3 mph, rain chance up to 35%.
UV index is 4. Sunscreen and sunglasses are sensible for longer outdoor time.
Fontana weather today
Sunny and 69°F in Fontana, WI. Today's high is 82°F with a 78% rain chance. Winds are around 3 mph with gusts near 5 mph. Relative humidity is 100%, pressure is 29.90 inHg, and visibility is about 10 miles.
Tonight and tomorrow in Fontana
Sunrise is at 05:57 AM and sunset is at 08:02 PM. Tomorrow's forecast calls for Sunny with a high near 82°F and a low near 68°F. The maximum rain chance is 75%.