As of 03:11 EDT

Mount Lebanon, PA weather in December

69°

Mount Lebanon, Monday, 10 August, 03:11

Overcast. Feels like 70°. High 84°, low 68°.

Pressure30.03 inHg

Wind4.5 mph S

Humidity93%

Visibility6.2 mi

Dew point67°

See detailed hourly forecast

In December, Mount Lebanon, PA averages a high of 39.8° and a low of 26.5°. About 3.6 inches of precipitation fall over the month (13 wet days). The record high is 70.9° (1982) and the record low -20.6° (1989). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	44.1°	30.7°	47%	64° (2006)	3.7° (1976)
2	43°	30.2°	37%	68.5° (1982)	7.7° (1976)
3	42.8°	29.1°	40%	70.9° (1982)	-1.1° (1966)
4	42.4°	28.9°	37%	65.1° (1982)	-4.9° (1966)
5	41.4°	29.5°	52%	68.5° (1982)	6.1° (1974)
6	41.2°	28.2°	50%	67.3° (1998)	5.7° (1974)
7	39.2°	27.9°	35%	63.9° (1998)	7.5° (2005)
8	40.1°	28°	28%	62.1° (1966)	8.4° (2003)
9	41.5°	27.5°	38%	65.8° (1966)	1.8° (1977)
10	40.5°	27.5°	48%	67.8° (1971)	0.7° (1977)
11	39.7°	27.3°	40%	63.5° (2021)	3.6° (1977)
12	40.8°	27.5°	35%	64.8° (2015)	-9.4° (1962)
13	39.6°	27.7°	50%	63.7° (2015)	-9.2° (1962)
14	40.6°	27.1°	43%	62.2° (2015)	1.9° (2005)
15	40.5°	27.7°	37%	68.7° (1971)	-2.4° (1962)
16	39.9°	26.8°	40%	63.3° (1984)	-5.3° (2016)
17	39°	26.8°	40%	62.1° (1984)	-5.1° (1989)
18	37°	25°	28%	57.6° (2025)	-12.3° (1989)
19	37.6°	23.5°	35%	54.7° (2002)	-5.3° (1989)
20	37.6°	24.1°	38%	53.2° (1978)	-4.7° (1980)
21	39°	24.4°	45%	64.6° (1967)	-4.4° (1989)
22	38.8°	25.3°	40%	63.9° (2013)	-20.6° (1989)
23	40.8°	25.7°	42%	62.6° (2015)	-13.9° (1989)
24	38.7°	24.8°	50%	61.5° (2015)	-9.2° (1960)
25	36.1°	23.4°	42%	64.2° (1982)	-9.9° (1983)
26	35.8°	23.4°	37%	59° (2016)	-5.6° (1983)
27	37.8°	23.5°	35%	61.5° (2015)	-10.3° (1989)
28	39.9°	25.5°	45%	64.4° (1982)	-4.4° (1960)
29	40.1°	25.3°	40%	65.5° (2024)	-4.2° (1993)
30	38.5°	24.8°	38%	62.1° (1984)	-7.1° (1983)
31	39.2°	25.7°	55%	59.7° (1972)	-8.3° (1963)