As of 11:15 CDT

St. Louis, MO weather in December

87°

St. Louis, Sunday, 9 August, 11:15

Mostly clear. Feels like 98°. High 96°, low 72°.

Pressure30.00 inHg

Wind3 mph NE

Humidity72%

Visibility6.2 mi

Dew point76°

See detailed hourly forecast

In December, St. Louis, MO averages a high of 43.4° and a low of 28.9°. About 2.9 inches of precipitation fall over the month (9 wet days). The record high is 74.3° (2025) and the record low -25.6° (1989). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	47.1°	32.7°	27%	70° (1970)	16.2° (1985)
2	48.4°	32.5°	20%	72.1° (2012)	10.9° (1985)
3	46.9°	33.1°	33%	72.9° (1998)	12.6° (2006)
4	46°	32.2°	27%	70.5° (1998)	3.6° (2006)
5	46.8°	31.3°	27%	72.3° (1998)	11.3° (2025)
6	44.4°	30.9°	37%	71.1° (1998)	6.1° (1977)
7	43.5°	30°	23%	68° (1980)	-3.5° (1977)
8	43.9°	30.6°	33%	68.4° (1991)	12.6° (2006)
9	44.4°	29.8°	30%	61.5° (1965)	3.9° (1977)
10	44.2°	28.6°	23%	66° (1965)	-4.2° (1977)
11	44.2°	28.6°	28%	64.8° (1979)	7° (1977)
12	44.2°	30.7°	25%	70.5° (2015)	2.1° (1962)
13	44.1°	30°	33%	65.3° (1975)	-0.9° (1961)
14	44.4°	30.2°	37%	66° (1975)	1° (1963)
15	45°	30°	37%	68.7° (2021)	-3.6° (1963)
16	42.6°	28.6°	27%	67.1° (1984)	-14.4° (1989)
17	41.5°	27.3°	18%	63.3° (1984)	-11.9° (1989)
18	42.1°	26.8°	28%	59.5° (2002)	-0.2° (2000)
19	42.3°	27°	25%	63.7° (1976)	-6.5° (1981)
20	42.4°	27.3°	25%	64.8° (1988)	-4.7° (2000)
21	41.4°	27.1°	32%	63.1° (1967)	-10.1° (1989)
22	42.1°	27.1°	25%	60.1° (1965)	-22.7° (1989)
23	42.4°	27.7°	28%	66.4° (2025)	-25.6° (1989)
24	39.7°	25.9°	27%	68° (2021)	-13.9° (1983)
25	39.6°	25°	17%	65.3° (2019)	-17.3° (1983)
26	41.4°	26.2°	20%	67.3° (2019)	-10.7° (1983)
27	42.6°	28°	32%	66.4° (1971)	4.6° (2017)
28	43.5°	27.5°	33%	74.3° (2025)	2.5° (2000)
29	41.2°	27.5°	37%	69.3° (1984)	-8.9° (1983)
30	41.4°	27.1°	33%	65.1° (1965)	-14.6° (1983)
31	40.3°	27.1°	35%	66° (2004)	0.1° (1976)