Herndon, Virginia Weather Forecast

Local

Herndon, VA, US

38.96955, -77.3861

Normals for July

	Temp ( °F °C )			Precip ( " mm )		Degree Days
	Min	Max	Avg	MTD	YTD	Heating	Cooling
1	66 19	87 30	76 25	0.14 undefined	21.68 undefined	0	11.3
2	66 19	87 31	76 25	0.29 undefined	21.83 undefined	0	11.4
3	66 19	87 31	77 25	0.42 undefined	21.96 undefined	0	11.6
4	66 19	87 31	77 25	0.56 undefined	22.1 undefined	0	11.7
5	66 19	87 31	77 25	0.69 undefined	22.23 undefined	0	11.8
6	66 19	87 31	77 25	0.82 undefined	22.36 undefined	0	11.9
7	67 19	88 31	77 25	0.95 undefined	22.49 undefined	0	12
8	67 19	88 31	77 25	1.09 undefined	22.63 undefined	0	12.1
9	67 19	88 31	77 25	1.22 undefined	22.76 undefined	0	12.2
10	67 19	88 31	77 25	1.36 undefined	22.9 undefined	0	12.3
11	67 19	88 31	77 25	1.49 undefined	23.03 undefined	0	12.3
12	67 19	88 31	77 25	1.62 undefined	23.16 undefined	0	12.4
13	67 19	88 31	77 25	1.76 undefined	23.3 undefined	0	12.4
14	67 20	88 31	77 25	1.9 undefined	23.44 undefined	0	12.4
15	67 20	88 31	78 25	2.04 undefined	23.58 undefined	0	12.5
16	67 20	88 31	78 25	2.18 undefined	23.72 undefined	0	12.5
17	67 20	88 31	78 25	2.32 undefined	23.86 undefined	0	12.5
18	67 20	88 31	78 25	2.47 undefined	24.01 undefined	0	12.5
19	67 20	88 31	78 25	2.6 undefined	24.14 undefined	0	12.5
20	67 20	88 31	78 25	2.74 undefined	24.28 undefined	0	12.5
21	67 20	88 31	78 25	2.87 undefined	24.41 undefined	0	12.5
22	67 20	88 31	78 25	3 undefined	24.54 undefined	0	12.5
23	67 20	88 31	77 25	3.13 undefined	24.67 undefined	0	12.4
24	67 20	88 31	77 25	3.27 undefined	24.81 undefined	0	12.4
25	67 20	88 31	77 25	3.39 undefined	24.93 undefined	0	12.4
26	67 19	88 31	77 25	3.52 undefined	25.06 undefined	0	12.3
27	67 19	88 31	77 25	3.64 undefined	25.18 undefined	0	12.3
28	67 19	88 31	77 25	3.77 undefined	25.31 undefined	0	12.3
29	67 19	88 31	77 25	3.89 undefined	25.43 undefined	0	12.2
30	67 19	88 31	77 25	4.02 undefined	25.56 undefined	0	12.2
31	67 19	88 31	77 25	4.15 undefined	25.69 undefined	0	12.1