Midwest Weather Forecast for Fourth of July Weekend: Heat, Humidity, and Storms

High temperatures and humidity will create heat index values near 100°F (38°C) in many areas.

Scattered showers and thunderstorms are possible throughout the weekend, with the highest risk of strong storms on Saturday afternoon and evening.

An air quality alert is in effect for some southeastern Wisconsin counties due to elevated ozone levels.

Sunday will bring cooler temperatures and decreasing humidity, but a stray shower or two can’t be ruled out.

Why this matters:: Understanding the weather forecast allows individuals and families to plan accordingly, whether it's hydrating properly, seeking shelter during storms, or adjusting outdoor activities.

Friday: Morning showers and storms are expected to clear by lunchtime, with hot and humid conditions prevailing throughout the afternoon. Plan for frequent breaks in the shade and stay hydrated. The combination of heat and humidity will require increased precautions during outdoor activities.

Saturday: The highest risk of strong to severe thunderstorms exists, particularly in the afternoon and evening. A cold front approaching from the west will interact with the hot, humid air, leading to potential for isolated severe storms with threats of straight-line wind gusts and large hail. Stay updated with local forecasts and be prepared to seek shelter if necessary.

Sunday: The cold front will bring cooler air and decreasing humidity, offering some relief from the heat. While most areas should remain dry, a stray shower or two is still possible.

Stay Hydrated: Drink plenty of water throughout the day, even before you feel thirsty. Avoid sugary drinks, caffeine, and alcohol, which can lead to dehydration.

Seek Air Conditioning: Spend time in air-conditioned environments whenever possible. If you don’t have A/C at home, consider visiting a public library, mall, or cooling center.

Limit Outdoor Activities: Reduce strenuous activities during the hottest part of the day. If you must be outside, wear lightweight, light-colored clothing and a hat.

Monitor Weather Alerts: Stay informed about weather conditions by monitoring local news, weather apps, and official weather alerts. The SPC (Storm Prediction Center) is a great resource: spc.gov.

Outdoor Workers: Those who work outside are at higher risk of heat-related illnesses and should take extra precautions.

Elderly and Children: These groups are more vulnerable to heat and should be closely monitored.

Individuals with Health Conditions: People with heart conditions, asthma, or other health issues should take extra care during periods of high heat and humidity.

Q: What is a heat advisory?

Q: How can I stay safe during a thunderstorm?