St. Louis weather in December
December in St. Louis averages 45°F by day and 29°F at night, with 2.5 inches of precipitation and 3.2 inches of snow. It is the 11th-warmest and 11th-wettest month of the year here.
- Average high
- 45°F-11° vs November
- Average low
- 29°F20 nights below freezing
- Precipitation
- 2.5 in5 days with 0.1 in. or more
- Snow
- 3.2 in0 days at 90°F+
Is December a good time to visit St. Louis?
December is cold, with highs around 45°F. The most comfortable months overall are June and September to October.
What to do in St. Louis in December
Mix it up: Gateway Arch, Missouri Botanical Garden, Gateway Arch National Park, Saint Louis Art Museum. All things to do in St. Louis.
On December 15 the sun rises at 7:12 am and sets at 4:40 pm, giving 9h 28m of daylight. Daylight all year.
What to pack for St. Louis in December
- A winter coat, hat, gloves and warm layers
- Expect nights below freezing
- Waterproof boots for snow
Based on 30-year averages, not a forecast. Check the forecast a few days before you go.
December nearby
| City | Distance | High | Low | Precip. |
|---|---|---|---|---|
| St. Louis | 45°F | 29°F | 2.5 in | |
| O'Fallon, MO | 28 mi | 45°F | 29°F | 2.5 in |
| Springfield, IL | 84 mi | 41°F | 25°F | 2.2 in |
| Columbia, MO | 114 mi | 44°F | 27°F | 2.1 in |
| Bloomington, IL | 145 mi | 38°F | 21°F | 2.3 in |
| Champaign, IL | 148 mi | 39°F | 24°F | 2.4 in |
| Peoria, IL | 148 mi | 39°F | 23°F | 2.2 in |
Warmer places in December
Big cities with comfortable December highs between 68°F and 86°F:
Frequently asked questions
What is the weather like in St. Louis in December?
In December, St. Louis averages a high of 45°F and a low of 29°F, with 2.5 inches of precipitation and 3.2 inches of snow (NOAA 1991-2020 normals).
Is December a good time to visit St. Louis?
December is cool to cold in St. Louis, with average highs of 45°F. Pack warm layers.
Does it snow in St. Louis in December?
Yes. December averages 3.2 inches of snow.
Before and after: St. Louis in November and St. Louis in January. All twelve months: St. Louis weather by month.
NOAA NCEI 1991-2020 climate normals, station St Louis Lambert Intl. Airport, MO, 9.8 miles from the city center.