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38.88101, -77.10428

Normals for September

Temp ( °F °C ) Precip ( " mm ) Degree Days
Min Max Avg MTD YTD Heating Cooling
1 64 18 84 29 74 23 0.15 undefined 32.6 undefined 0.2 9
2 64 18 84 29 74 23 0.3 undefined 32.75 undefined 0.2 8.8
3 63 17 83 29 73 23 0.45 undefined 32.9 undefined 0.2 8.6
4 63 17 83 28 73 23 0.6 undefined 33.05 undefined 0.3 8.3
5 63 17 83 28 73 23 0.74 undefined 33.19 undefined 0.3 8.1
6 63 17 83 28 73 23 0.88 undefined 33.33 undefined 0.3 7.8
7 62 17 82 28 72 22 1.02 undefined 33.47 undefined 0.4 7.6
8 62 17 82 28 72 22 1.17 undefined 33.62 undefined 0.4 7.4
9 62 17 82 28 72 22 1.32 undefined 33.77 undefined 0.5 7.2
10 61 16 81 27 71 22 1.47 undefined 33.92 undefined 0.5 6.9
11 61 16 81 27 71 22 1.63 undefined 34.08 undefined 0.6 6.7
12 61 16 81 27 71 22 1.79 undefined 34.24 undefined 0.7 6.4
13 60 16 80 27 70 21 1.94 undefined 34.39 undefined 0.7 6.1
14 60 16 80 27 70 21 2.11 undefined 34.56 undefined 0.8 5.9
15 60 15 80 27 70 21 2.28 undefined 34.73 undefined 0.9 5.6
16 59 15 79 26 69 21 2.45 undefined 34.9 undefined 1 5.4
17 59 15 79 26 69 21 2.61 undefined 35.06 undefined 1.1 5.2
18 59 15 79 26 69 20 2.78 undefined 35.23 undefined 1.3 4.9
19 58 15 78 26 68 20 2.93 undefined 35.38 undefined 1.4 4.7
20 58 14 78 26 68 20 3.09 undefined 35.54 undefined 1.5 4.4
21 57 14 78 25 68 20 3.24 undefined 35.69 undefined 1.6 4.2
22 57 14 77 25 67 20 3.39 undefined 35.84 undefined 1.8 3.9
23 57 14 77 25 67 19 3.53 undefined 35.98 undefined 1.9 3.6
24 56 13 77 25 66 19 3.67 undefined 36.12 undefined 2 3.4
25 56 13 76 25 66 19 3.82 undefined 36.27 undefined 2.2 3.1
26 55 13 76 24 66 19 3.97 undefined 36.42 undefined 2.4 3
27 55 13 75 24 65 18 4.11 undefined 36.56 undefined 2.7 2.8
28 55 13 75 24 65 18 4.25 undefined 36.7 undefined 2.9 2.7
29 54 12 75 24 64 18 4.4 undefined 36.85 undefined 3.2 2.6
30 54 12 74 23 64 18 4.54 undefined 36.99 undefined 3.5 2.4

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