Typical Weather in St Louis, MO in December
44° F Avg High
29° F Avg Low
5 Rainy Days
☀️ Temperature Summary
December is one of the cooler months of the year for St Louis, with highs averaging around 44°F. You can expect overnight lows near 29°F most days. Temperatures will usually fall as the month goes on, with daily high temperatures ranging between 50°F and 43°F.
December is a great time to visit St Louis, with mild temperatures and sunny days being very common.
High Temps Throughout the Year
🎒 What to Pack
Pick up a few of these items to keep your trip fun and comfortable.
☔ Rain Summary
In December you can expect close to a 16% chance of rain for any given day. It rains less than usual in December, with total rainfall for the month typically near 3 inches.
Rainfall Throughout the Year
Planning a trip to St Louis? Try our free trip weather planner