As of 00:08 EDT

Herndon, VA weather in July

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 July, Herndon, VA averages a high of 87° and a low of 68.6°. About 3.8 inches of precipitation fall over the month (12 wet days). The record high is 104° (2012) and the record low 52.9° (1979). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	85.1°	66.7°	43%	97.5° (2012)	54° (1988)
2	85.6°	66.2°	35%	98.4° (2018)	55.6° (1982)
3	86.2°	66.6°	40%	98.6° (1966)	55.2° (2001)
4	86.2°	67.5°	43%	100.8° (1990)	56.3° (1986)
5	86.2°	68.2°	48%	100.8° (1999)	56.1° (1979)
6	86.4°	67.8°	35%	101.1° (1999)	52.9° (1979)
7	87.3°	67.8°	35%	104° (2012)	54.7° (1979)
8	87.6°	68°	32%	101.5° (2012)	55.4° (1983)
9	88°	68.5°	37%	99.1° (1999)	55.9° (1984)
10	86.9°	69.1°	35%	99.3° (1988)	55.6° (1963)
11	86.7°	68°	38%	98.2° (1988)	56.7° (1961)
12	86.2°	67.5°	38%	95° (2011)	56.3° (1978)
13	86.7°	68.2°	38%	96.6° (2023)	56.8° (1978)
14	87.6°	68.7°	42%	98.1° (1995)	59.7° (2001)
15	87.6°	68.7°	35%	99.3° (1995)	59.9° (1960)
16	88.3°	69.3°	35%	101.7° (1988)	59° (1960)
17	89.1°	69.3°	35%	101.7° (1988)	61.5° (1987)
18	88.9°	69.4°	30%	98.4° (1986)	59° (2014)
19	89.2°	69.8°	42%	99° (2019)	60.1° (1976)
20	88.7°	70.3°	33%	100.9° (2019)	59.2° (2000)
21	88°	69.6°	45%	101.5° (2019)	55.8° (1965)
22	87.1°	69.8°	45%	101.8° (2011)	57.9° (1966)
23	86.2°	69.4°	42%	100.2° (2010)	60.6° (2000)
24	86°	68.9°	37%	101.5° (2010)	59.9° (1985)
25	86.2°	69.1°	40%	100.4° (2016)	59.5° (2014)
26	86.4°	69.1°	42%	98.4° (2012)	57.4° (1976)
27	87.4°	69.6°	40%	101.5° (2023)	57.6° (1975)
28	87.3°	69.3°	37%	100.8° (2023)	55.8° (1962)
29	85.5°	68.7°	45%	102° (2023)	61° (1984)
30	85.3°	68.5°	33%	97.3° (2019)	56.1° (2014)
31	85.8°	68.2°	35%	100.6° (1999)	58.3° (1997)