St. Louis, Missouri, United States climate

Average temperatures, precipitation and all-time records for St. Louis, Missouri, United States, with every day graded against ~45 years of local climate history (1981–2026). Its warmest month is July, averaging a high of 88°F, and its coldest is January, with an average low of 21°F.

St. Louis is an independent city in the U.S. state of Missouri. It lies near the confluence of the Mississippi and the Missouri rivers. In 2020, the city proper had a population of 301,578, while its metropolitan area, which extends into Illinois, had an estimated population of over 2.8 million. via Wikipedia

How today compares

Latest recorded day: 2026-07-21. Each reading placed on St. Louis, Missouri, United States's own ±7-day seasonal distribution.

High 96°F High · 87th pct

Low 76°F Very High · 94th pct

Feels-like 102°F Normal · 43rd pct

Humidity 20.1 g/m³ Above Normal · 73rd pct

Wind 15 mph Very High · 97th pct

Precip 0.00 in Dry

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St. Louis average temperatures by month

Typical daily high and low, and average precipitation, for each month in St. Louis, Missouri, United States, based on 1981–2026 records. The wettest month is May (0.20 in on an average day).

Month	Avg high	Avg low	Avg precip
January	38°F	21°F	0.10 in
February	44°F	25°F	0.10 in
March	56°F	34°F	0.10 in
April	66°F	44°F	0.10 in
May	75°F	54°F	0.20 in
June	84°F	65°F	0.10 in
July	88°F	69°F	0.10 in
August	88°F	67°F	0.10 in
September	82°F	59°F	0.10 in
October	70°F	46°F	0.10 in
November	55°F	35°F	0.10 in
December	42°F	26°F	0.10 in

Jan 6°–53°

Feb 11°–61°

Mar 23°–71°

Apr 32°–78°

May 43°–83°

Jun 56°–90°

Jul 62°–96°

Aug 59°–96°

Sep 50°–91°

Oct 35°–81°

Nov 23°–69°

Dec 13°–56°

Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -10°F to 115°F scale, so the whole year's rhythm reads at a glance.

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Record extremes

Hottest day on record: 109°F on 2012-07-24
Coldest day on record: -18°F on 1982-01-10

All St. Louis weather records →

Percentiles compare each day to St. Louis, Missouri, United States's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →