St. Louis, Missouri – Missouri enters July with sunshine and rising heat, but a summer weather alert is in effect for Friday, July 4th, as thunderstorms may disrupt holiday plans across the St. Louis region.
According to the National Weather Service in St. Louis, Tuesday begins mostly sunny with a high near 88°F. Temperatures will climb into the mid-90s by Thursday, building instability just in time for Independence Day, when thunderstorms are possible — especially along I-70 and major outdoor event areas.
While the exact timing of Friday’s storms remains uncertain, any rainfall could interfere with fireworks displays, parades, and lake travel. Residents and visitors are advised to monitor conditions closely, prepare backup plans, and avoid water activities during active weather.
Thursday, still looks hot and dry with highs near 93°F, making it a good day for early celebrations. But by Friday, moisture and heat combine to create a 40% chance of showers and storms, mainly in the afternoon and evening — prime time for Fourth of July festivities.
Stay hydrated, limit direct sun exposure, and have indoor options ready as summer heat and storm chances mix.
