Weather
MO-IL Weather Alert: St. Louis Near Freezing Sunday, Nov 15–19
St. Louis, MO – Residents across St. Louis County, St. Clair County and the greater Missouri Illinois metropolitan area face a chilly start followed by a steady warming trend.
By Sophie Caldwell · 2026-11-15T10:50:29.592Z
St. Louis, MO – Residents across St. Louis County, St. Clair County and the greater Missouri Illinois metropolitan area face a chilly start followed by a steady warming trend.
According to the National Weather Service St. Louis office, temperatures should climb to approximately 54 degrees Sunday under mostly sunny skies.
At St. Louis Lambert International Airport, temperatures registered 30 degrees early Sunday, with calm winds and fair conditions.
The colder air raises concerns for sensitive outdoor plants and exposed surfaces, particularly in locations where moisture remains.
Near Freezing Temperatures Return Sunday Night Sunday evening brings another sharp temperature drop as skies become mostly clear.
Temperatures should fall near 32 degrees by early Monday.
That puts portions of the region near the freezing mark, potentially affecting sensitive vegetation and outdoor plumbing.
Residents should consider protecting vulnerable plants and checking exposed water connections.
Drivers traveling Interstate 64, Interstate 70 and Interstate 55 should remain alert for isolated slick spots if moisture is present on untreated surfaces.
However, the official local forecast does not indicate precipitation or widespread icy conditions.
Monday and Tuesday Bring Improving Temperatures Monday brings sunshine and a high near 57 degrees.
Calm winds should make the afternoon comfortable compared with the colder morning hours.
Monday night temperatures fall near 34 degrees.
Tuesday continues the warming trend, with sunshine and temperatures approaching 59 degrees.
Light south winds around 5 mph develop during the afternoon.
Tuesday night remains clear, with temperatures near 38 degrees.
Wednesday and Thursday Bring November Warmup Wednesday marks another noticeable shift as temperatures climb to approximately 63 degrees.
Mostly sunny skies should dominate the afternoon.
Wednesday night remains considerably milder, with temperatures near 47 degrees.
Thursday brings the warmest afternoon of the five day outlook, with highs near 67 degrees.
That represents a 37 degree difference from Sunday's early observed temperature.
The National Weather Service outlook indicates no rain or snow through Thursday.
No local tornado threat is identified in the supplied forecast.
Weekend Rain Chances Begin to Develop Friday could bring temperatures near 69 degrees, followed by another mild afternoon Saturday.
A 30% chance of rain develops Saturday, with temperatures potentially reaching 71 degrees.
For now, the biggest weather story is the transition from freezing temperatures to springlike afternoons.
Five Day St. Louis Weather Outlook Sunday, Nov. 15 — Near Freezing Start, Sunny Afternoon
High: 54°F | Low: 32°F Early observed temperature near 30°F. Mostly sunny skies throughout the afternoon. Calm winds expected. Mostly clear conditions Sunday night. Temperatures return to the freezing mark by early Monday. Protect sensitive plants from prolonged cold exposure. Monday, Nov. 16 — Sunshine and Warmer Temperatures
High: 57°F | Low: 34°F Sunny skies throughout the day. Calm winds. Mostly clear skies Monday night. Temperatures remain chilly during the morning and evening. No precipitation indicated. Tuesday, Nov. 17 — Sunshine With Highs Near 60°
High: 59°F | Low: 38°F Sunny skies across the St. Louis metropolitan area. Calm winds becoming south around 5 mph during the afternoon. Clear skies Tuesday night. Temperatures continue their gradual climb. Favorable conditions for most outdoor activities. Wednesday, Nov. 18 — Temperatures Reach 63°
High: 63°F | Low: 47°F Mostly sunny skies. Afternoon temperatures climb into the lower 60s. Partly cloudy conditions Wednesday night. Noticeably milder evening temperatures. No precipitation indicated. Thursday, Nov. 19 — Warmest Day of the Five Day Period
High: 67°F | Low: 50°F Mostly sunny skies. Temperatures climb into the upper 60s. Partly cloudy skies Thursday night. No precipitation indicated. Mild conditions continue across both sides of the Mississippi River. Looking Ahead: November 20–21 Friday brings mostly sunny skies and temperatures near 69 degrees.
Friday night remains partly cloudy, with temperatures around 51 degrees.
Saturday could reach approximately 71 degrees under mostly sunny skies, although a 30% chance of rain enters the outlook.