As of 00:08 EDT

Herndon, VA weather in December

75°

Herndon, Sunday, 9 August, 00:08

Overcast. Feels like 76°. High 89°, low 73°.

Pressure30.00 inHg

Wind5.4 mph W

Humidity83%

Visibility6.2 mi

Dew point70°

See detailed hourly forecast

In December, Herndon, VA averages a high of 44.9° and a low of 30.7°. About 3.4 inches of precipitation fall over the month (9 wet days). The record high is 75.2° (1998) and the record low -3.8° (1960). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	48.9°	34°	33%	71.6° (2006)	15.4° (1967)
2	48.7°	33.3°	25%	64.4° (1970)	13.6° (1967)
3	48.7°	33.3°	23%	68.7° (1998)	17.8° (1976)
4	48.2°	33.1°	22%	72° (1982)	16.3° (1966)
5	46.9°	33.3°	35%	72° (1998)	22.5° (1966)
6	47.3°	32.7°	33%	75.2° (1998)	13.8° (2002)
7	45.9°	31.6°	20%	73.8° (1998)	3.7° (2002)
8	45.7°	31.8°	23%	69.1° (1978)	16° (2003)
9	45.1°	31.5°	38%	68.2° (1966)	12.2° (1989)
10	46°	32.4°	30%	68.9° (1966)	12.4° (1989)
11	45.7°	31.8°	35%	67.1° (2021)	15.3° (1995)
12	45.3°	31.1°	23%	69.3° (2015)	9.3° (1962)
13	45°	31.1°	33%	69.6° (2015)	6.8° (1960)
14	44.2°	31.1°	33%	67.8° (2015)	5.4° (1960)
15	45.3°	31.1°	27%	66.6° (1971)	14° (2025)
16	44.6°	30.7°	37%	66° (1971)	9.5° (1989)
17	45°	30.7°	27%	66.7° (1984)	5.5° (1989)
18	43.2°	29.7°	20%	68.2° (2006)	5.2° (1960)
19	42.4°	28.4°	22%	60.4° (1970)	10.4° (1973)
20	42.1°	27.9°	27%	59.4° (1987)	3.6° (1960)
21	43°	29.1°	23%	65.8° (2013)	5.7° (1981)
22	43.3°	29.1°	33%	70.3° (2013)	2.3° (1989)
23	45°	29.1°	37%	63° (1990)	-3.8° (1960)
24	44.2°	29.3°	38%	68.4° (2015)	-3.3° (1960)
25	42.6°	28.2°	38%	68.7° (2021)	-0° (1983)
26	41°	27.7°	23%	63° (1964)	3.2° (1983)
27	41.9°	28.2°	15%	69.6° (2015)	9° (1989)
28	44.6°	29.8°	30%	67.1° (1984)	8.8° (1966)
29	44.2°	30.6°	35%	70.7° (1984)	7.3° (1961)
30	43.2°	29.7°	22%	64.8° (2019)	7.2° (1961)
31	44.2°	29.3°	40%	65.8° (1992)	3.4° (1962)