Station Name: LAKE MONONA AT MADISON, WI
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 840 feet

Nearest Address:
795 W Washington Ave
Madison, WI 53715
Dane County

GPS Coordinates: 43.0633297, -89.3970636

Nearby Water Temperatures

Heat Advisory issued June 29 at 8:53PM CDT until July 1 at 10:00PM CDT by NWS Chicago IL

Effective: Mon June 29, 2026, 8:53 PM
Expires: Tue June 30, 2026, 7:00 AM

* WHAT...Heat index values around 105 expected each afternoon * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...Until 10 PM CDT /11 PM EDT/ Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

Extreme Heat Warning issued June 30 at 1:51AM CDT until July 3 at 12:00AM CDT by NWS Chicago IL

Effective: Tue June 30, 2026, 1:51 AM
Expires: Tue June 30, 2026, 12:00 PM

* WHAT...Dangerously hot conditions with heat index values around 105 expected each afternoon. * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...Until midnight CDT /1 AM EDT/ Thursday Night. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Dangerous heat is now expected to persist through Thursday. Thunderstorms may begin to bring some relief from the heat for portions of northern Illinois by Thursday afternoon or evening.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.