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

Extreme Heat Warning issued June 30 at 8:40PM CDT until July 3 at 12:00AM CDT by NWS Chicago IL

Effective: Tue June 30, 2026, 8:40 PM
Expires: Wed July 1, 2026, 6:45 AM

* WHAT...Dangerously hot conditions with heat index values around 105 expected each afternoon. * WHERE...Northern and central 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 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.

Extreme Heat Warning issued July 1 at 2:30AM CDT until July 3 at 12:00AM CDT by NWS Chicago IL

Effective: Wed July 1, 2026, 2:30 AM
Expires: Wed July 1, 2026, 12:30 PM

* WHAT...Dangerously hot conditions with peak afternoon heat index values of 100 to 110 degrees. * WHERE...Northern and central Illinois and northwest Indiana. * WHEN...Until midnight CDT Thursday Night. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

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 July 1 at 12:41AM CDT until July 1 at 7:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Wed July 1, 2026, 12:41 AM
Expires: Wed July 1, 2026, 8:45 AM

* WHAT...Dangerously hot conditions with heat index values up to 106 degrees. * WHERE...Portions of east central, south central, and southeast Wisconsin. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. Stay cool, stay hydrated, stay informed.

Extreme Heat Warning issued July 1 at 6:33AM CDT until July 1 at 7:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Wed July 1, 2026, 6:33 AM
Expires: Wed July 1, 2026, 2:45 PM

* WHAT...Dangerously hot conditions with heat index values of 100 to 105 degrees. * WHERE...Portions of east central, south central, and southeast Wisconsin. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. Stay cool, stay hydrated, stay informed.