St. Louis, MO All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in St. Louis, from NOAA daily weather observations.
| Temperature | ||
|---|---|---|
| Record High | 114.9°F (46°C) | July 14, 1954 |
| Record Low | -18°F (-28°C) | January 20, 1985 |
| Lowest High | -5°F (-21°C) | December 24, 1983 |
| Highest Low | 86°F (30°C) | July 25, 2012 |
| Highest Mean | 97.5°F (36°C) | July 14, 1954 |
| Lowest Mean | -8.5°F (-22°C) | January 20, 1985 |
| Precipitation | ||
| Max in One Calendar Day | 8.64" (219.5 mm) | July 26, 2022 |
| Max in One Month | 14.78" (375.4 mm) | August 1946 |
| Least in One Month | 0.00" (0.0 mm) | September 1940 |
| Max in One Year | 61.28" (1556.5 mm) | 2015 |
| Least in One Year | 20.59" (523.0 mm) | 1953 |
| Snowfall | ||
| Max in One Calendar Day | 12.4" (31.5 cm) | March 24, 2013 |
| Max in One Month | 26.3" (66.9 cm) | December 1973 |
| Max in One Season | 66.2" (168.2 cm) | 1977-78 |
| Max in One Year | 49.3" (125.1 cm) | 1977 |
| Earliest Snow | 0.2" (0.5 cm) | November 3, 1997 |
| Earliest Measurable Snow | 0.2" (0.5 cm) | November 3, 1997 |
| Latest Snow | 0.2" (0.5 cm) | May 6, 1998 |
| Latest Measurable Snow | 0.2" (0.5 cm) | May 6, 1998 |
| Period of Record | ||
| Temperature | April 1, 1938 – February 6, 2025 | |
| Precipitation | April 1, 1938 – February 6, 2025 | |
| Snowfall | April 2, 1938 – February 6, 2025 | |
Note: Records compiled from NOAA GHCN-Daily observations at ST LOUIS LAMBERT INTL AP (13 mi from St. Louis, MO). Quality-flagged readings are excluded. Monthly and annual totals require substantially complete reporting for “least” records.
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Frequently Asked Questions
What is the hottest temperature ever recorded in St. Louis, MO?
The all-time record high in St. Louis, MO is 114.9°F (46°C), set on July 14, 1954.
What is the coldest temperature ever recorded in St. Louis, MO?
The all-time record low in St. Louis, MO is -18°F (-28°C), set on January 20, 1985.
What is the most rain St. Louis, MO has ever had in one day?
The most precipitation recorded in one calendar day near St. Louis, MO is 8.64 inches, on July 26, 2022.
What is the biggest snowfall ever recorded in St. Louis, MO?
The most snow recorded in one calendar day near St. Louis, MO is 12.4 inches, on March 24, 2013.
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