MISSOURI — The last calm stretch of fall air hangs over St. Louis this morning, but clouds are already gathering to the west — a rainmaker system poised to move in early this week. After a mild weekend, the first half of Thanksgiving week will bring a brief wet spell followed by a sharp temperature drop and clearer skies for travelers heading into the holiday.
According to the National Weather Service St. Louis, Monday brings increasing clouds and a 50% chance of rain developing by afternoon, followed by steadier showers through Monday night. Rainfall totals could reach a half inch in spots, enough to create slippery conditions on I-70 and I-55 during the late commute. Temperatures will stay seasonable, topping out near 57°F Monday before dipping into the low 50s Tuesday under mostly cloudy skies.
By Wednesday, a strong push of cooler, drier air arrives, sweeping out moisture and ushering in sunshine with highs only in the mid-40s. Thanksgiving Day looks pleasant but crisp, with mostly sunny skies and highs around 45°F — ideal for morning parades or outdoor family plans, though travelers should still dress for the chill.
Looking toward the weekend, models hint at a second, weaker disturbance late Friday or Saturday with a chance of light rain or flurries north of the metro — an early reminder that winter’s edge is closing in on the Midwest just as the holiday season begins.
Five-Day Forecast for St. Louis, MO:
Sun: 57/45 – Mostly sunny; mild.
Mon: 57/51 – Rain developing; breezy evening.
Tue: 61/37 – Cloudy; cooler late.
Wed: 46/30 – Sunny; breezy and cool.
Thu: 45/28 – Thanksgiving Day sunshine; cold morning start.
