Rockville, Maryland Weather Forecast

Local

Rockville, MD, US

39.084, -77.15276

Normals for September

	Temp ( °F °C )			Precip ( " mm )		Degree Days
	Min	Max	Avg	MTD	YTD	Heating	Cooling
1	65 18	82 28	74 23	0.11 undefined	27.25 undefined	0.1	8.6
2	64 18	82 28	73 23	0.23 undefined	27.37 undefined	0.1	8.4
3	64 18	82 28	73 23	0.35 undefined	27.49 undefined	0.1	8.2
4	64 18	82 28	73 23	0.47 undefined	27.61 undefined	0.2	7.9
5	64 18	81 27	73 23	0.58 undefined	27.72 undefined	0.2	7.7
6	63 17	81 27	72 22	0.7 undefined	27.84 undefined	0.2	7.4
7	63 17	81 27	72 22	0.82 undefined	27.96 undefined	0.3	7.2
8	63 17	80 27	72 22	0.94 undefined	28.08 undefined	0.3	6.9
9	63 17	80 27	71 22	1.07 undefined	28.21 undefined	0.4	6.7
10	62 17	80 27	71 22	1.2 undefined	28.34 undefined	0.4	6.4
11	62 17	79 26	71 22	1.34 undefined	28.48 undefined	0.5	6.2
12	62 16	79 26	70 21	1.49 undefined	28.63 undefined	0.6	5.9
13	61 16	79 26	70 21	1.64 undefined	28.78 undefined	0.7	5.6
14	61 16	78 26	70 21	1.8 undefined	28.94 undefined	0.8	5.4
15	61 16	78 26	69 21	1.95 undefined	29.09 undefined	0.9	5.1
16	60 16	78 25	69 20	2.11 undefined	29.25 undefined	1	4.9
17	60 15	77 25	68 20	2.25 undefined	29.39 undefined	1.2	4.6
18	59 15	77 25	68 20	2.4 undefined	29.54 undefined	1.3	4.4
19	59 15	76 25	68 20	2.54 undefined	29.68 undefined	1.5	4.1
20	59 15	76 24	67 20	2.67 undefined	29.81 undefined	1.6	3.9
21	58 15	76 24	67 19	2.79 undefined	29.93 undefined	1.8	3.6
22	58 14	75 24	66 19	2.91 undefined	30.05 undefined	1.9	3.3
23	57 14	75 24	66 19	3.04 undefined	30.18 undefined	2.1	3.1
24	57 14	74 23	66 19	3.18 undefined	30.32 undefined	2.3	2.8
25	56 14	74 23	65 18	3.32 undefined	30.46 undefined	2.5	2.6
26	56 13	73 23	65 18	3.46 undefined	30.6 undefined	2.8	2.5
27	56 13	73 23	64 18	3.6 undefined	30.74 undefined	3	2.3
28	55 13	73 23	64 18	3.74 undefined	30.88 undefined	3.3	2.2
29	55 13	72 22	63 17	3.87 undefined	31.01 undefined	3.6	2.1
30	54 12	72 22	63 17	4.01 undefined	31.15 undefined	3.9	1.9