St. Louis, Missouri – Summer is setting in fast across Missouri as June kicks off with near 90°F highs in St. Louis and a growing risk of storms by midweek. While Sunday stays sunny and dry, conditions will turn more unstable by Tuesday night with storms likely to impact the metro.
According to the National Weather Service in St. Louis, Sunday’s high will reach 84°F under clear skies, climbing to 87°F Monday and peaking near 89°F on Tuesday. Humidity will rise through Tuesday, increasing the chance of thunderstorms, which stand at 50% Tuesday night. These storms could bring gusty winds, lightning, and downpours to key routes including I-64 and I-70 during the Tuesday evening commute.
By Wednesday, the chance of rain jumps to 80% with continued thunderstorm activity and highs in the low 80s. Wet pavement and low visibility may affect morning drivers across St. Louis County and into the Metro East.
Residents should secure outdoor furniture, monitor weather alerts, and avoid travel during active storm periods. Power outages are possible with stronger storms Wednesday.
Summer preview – 5-day outlook for St. Louis:
- Sunday (June 1): Sunny, high 84°F
- Monday: Sunny and warm, high 87°F
- Tuesday: Partly sunny, high 89°F, storms possible after 1 p.m.
- Wednesday: Showers/storms likely, high 82°F
- Thursday: Storms continue, high 79°F, clearing into Friday
