As of 04:41 CDT

St. Mary, MO weather in December

72°

St. Mary, Sunday, 9 August, 04:41

Clear. Feels like 73°. High 96°, low 72°.

Pressure30.00 inHg

Wind4.7 mph S

Humidity91%

Visibility6.2 mi

Dew point69°

See detailed hourly forecast

In December, St. Mary, MO averages a high of 44.8° and a low of 30.4°. About 3.3 inches of precipitation fall over the month (9 wet days). The record high is 75.7° (2025) and the record low -20.2° (1989). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	48.7°	34°	25%	70.9° (1970)	19° (1964)
2	49.6°	34.2°	23%	71.4° (2021)	12.7° (1985)
3	48.2°	34.7°	25%	73° (2021)	16° (1985)
4	47.1°	33.8°	23%	68.7° (1998)	16.3° (1991)
5	47.8°	32.5°	30%	71.8° (1998)	16.2° (2025)
6	45.7°	32.5°	33%	70.3° (1998)	9.9° (2002)
7	45.1°	31.3°	22%	67.1° (1980)	5.9° (2013)
8	45°	31.8°	30%	66.9° (1966)	14.5° (2006)
9	45.9°	31.1°	32%	64.8° (2020)	7.3° (1995)
10	45.3°	30.6°	30%	66.9° (2021)	7° (1977)
11	45.9°	30.4°	25%	67.6° (2021)	11.3° (1972)
12	45.7°	31.8°	25%	69.4° (2015)	-4.4° (2013)
13	45.3°	31.6°	40%	67.6° (2015)	6.1° (2010)
14	45.7°	31.8°	35%	66.6° (2015)	2.7° (1963)
15	46°	31.5°	37%	66° (1984)	-1.7° (1989)
16	44.1°	30.4°	27%	68.2° (2024)	-11.2° (1989)
17	43.5°	29.3°	22%	66° (1984)	-4.2° (1989)
18	43.9°	28.6°	22%	60.4° (1976)	3.4° (2000)
19	43.9°	28.9°	25%	63.5° (1976)	-2.7° (1963)
20	44.2°	28.8°	27%	66.7° (2013)	-2.9° (2000)
21	43°	28.6°	28%	63.3° (1967)	-6° (1989)
22	43.7°	28.2°	33%	60.3° (1965)	-16.8° (1989)
23	43.7°	29.7°	28%	67.3° (2025)	-20.2° (1989)
24	41.5°	27.9°	30%	70.9° (2025)	-12.5° (1989)
25	41.2°	26.6°	22%	70.9° (2025)	-14.6° (1983)
26	42.8°	27.5°	28%	74.5° (2025)	-7.1° (1983)
27	43.7°	29.5°	35%	66.7° (2021)	7.3° (2017)
28	45.1°	28.8°	28%	75.7° (2025)	7.3° (2000)
29	42.6°	29.8°	27%	67.1° (1984)	-6° (1983)
30	43.2°	28.8°	30%	65.1° (1965)	-10.1° (1983)
31	42.1°	28.9°	35%	67.6° (2021)	2.7° (1976)