St. Louis/ Weather & Environment

Clear Sunday Gives Way To A Warmer Week In St. Louis

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Published on October 04, 2026
Clear Sunday Gives Way To A Warmer Week In St. LouisSource: Google Street View

St. Louis is starting Sunday under clear skies, with sunshine and an afternoon high near 80 degrees. Winds will stay light, and rain is not expected as the Gateway City settles into a dry, comfortable day.

Sunny Skies Start Sunday

An early Sunday report put temperatures around 52 degrees under clear skies. Shallow fog was possible near some terminals and near the Missouri River northwest of JEF, while sunshine was expected to take over as temperatures climbed through the 50s and 60s.

According to the National Weather Service in St. Louis, Sunday’s high should reach about 80 degrees under clear skies. A north or northwest breeze will run from 1 to 7 mph, with no watches, warnings or advisories listed for the area.

Cooler Monday, Then The Warmup Returns

Sunday night will be mostly clear, with temperatures falling to around 53 degrees and a north wind near 6 mph. Monday brings another sunny day, though it will be a touch cooler, with a high near 75 and an overnight low around 50.

The forecast turns steadily warmer Tuesday, when St. Louis should reach about 79 degrees under sunny skies. Wednesday and Thursday are expected to climb into the low-to-mid 80s, with highs near 84 and 83, respectively.

Warmer 80s Later In The Week

Friday could be the warmest day of the workweek, with a high near 85 degrees and plenty of sun. Saturday is forecast to reach about 81 degrees under mostly cloudy skies, with a low chance of rain during the day and night.

For outdoor plans, the week looks unusually cooperative: chilly mornings, warm afternoons and almost no rain in sight. Temperatures are forecast to rise into the 80s beginning Tuesday, after Monday’s brief fall-style cooldown.