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(The monthly data in the wdc-like format is here.)

                                      WDC for Geomagnetism, Kyoto
                                Hourly Equatorial Dst Values (FINAL)      
                                          SEPTEMBER   2009
      unit=nT                                                                                      UT
      1   2   3   4   5   6   7   8    9  10  11  12  13  14  15  16   17  18  19  20  21  22  23  24
DAY
 1   -8  -7  -3  -3  -4  -5  -3  -3   -4  -7  -9 -10  -8  -9  -8  -9   -8  -9  -6   0   1  -3  -4  -4
 2   -4  -5  -7  -8  -8  -9  -7  -3    1   1  -2  -3  -1   3   2  -2   -1   0  -2  -6  -8  -7  -8  -7
 3   -7  -6  -3   0   0  -2  -1  -3   -3  -3  -5  -3  -1   1   0   1   12  10   4   4  10   4  -7  -3
 4    3   1   0   2   2  -2  -6  -8   -4  -7  -5  -2  -2  -3  -6  -5   -6  -5  -6  -7  -5  -7  -8  -7
 5   -6  -5  -3  -3  -4  -6  -5  -4   -4  -5  -6  -6  -5  -6  -4  -2   -2  -4  -5  -5  -5  -8  -8  -9

 6   -7  -5  -2  -2  -2  -1   0   3    2   2   2   1   1   3   5   6    4   2   2   0  -4  -5  -5  -6
 7   -5  -3   0   3   3   1   1   2    1  -1  -3  -2   1   5   7   5    2  -2  -3  -5  -6  -6  -6  -3
 8   -2  -2  -2   0  -1  -1   1   3    3   5   4   5   7  12  15  14   11   6   2   1  -2  -5  -5  -5
 9   -2  -1   2   1   1   1   2   3    3   3   3   4   6   7   8   7    4   1   0   2   1   0  -2  -2
10    0   0   3   4   4   2   3   5    6   7   7   8   7  10  10   7    4   3   1   1   2   0  -2  -3

11   -2  -2  -2  -4  -6  -6  -4  -1    0  -1  -5  -7  -4  -1   0   6    8   4  -3 -10 -14 -13 -10  -7
12   -4  -3  -1  -1  -4 -11 -13 -10   -5  -3  -1   0   0   1   1  -1   -2  -1  -2  -5  -6  -4  -4  -4
13   -4  -2  -1  -4 -10 -11  -8  -6   -5  -3  -1   3  10  17  17  12    7   2  -2  -3  -7 -12 -10 -10
14  -11 -10  -9  -7  -8  -6  -4  -4   -2   1   1   5   9   9   9   8    3  -2 -10 -14 -14 -13 -10  -9
15   -4   1   4   0  -4  -9  -8 -12  -14 -11 -10  -8  -7  -6  -7  -9   -8  -5  -5  -6  -7  -8 -10 -11

16   -7  -1   3   2   0  -3  -4  -9  -15 -14 -13 -11  -9  -6  -5  -3   -4  -5  -6  -5  -3  -5  -3  -2
17   -5  -5  -6  -4  -5  -7 -11 -11   -8  -6  -5  -4  -1   1  -1  -2   -1  -2  -4  -6  -9 -10  -9  -8
18   -3   2   6   6   4   1   1   1    0  -1  -1   2   4   3   4   3    2   2   0  -2  -4  -6  -6  -6
19   -2   4   7   7   5   2  -2  -5   -6  -4  -4  -6  -5  -6  -6  -6   -4  -2  -1  -2  -2   2   2   4
20    3   3   2   4   4   2   2  -1    1   4   5   6   4   3   3  10   15  15  16  12   7  -1  -5   0

21   -1  -4  -5  -3  -2  -3  -2  -6  -15 -22 -19 -16 -13 -15 -13 -14  -14 -14 -16 -16 -16 -17 -17 -17
22  -15 -12  -7  -5  -3  -4  -5  -6   -6  -6  -6  -6  -7  -6  -5  -3   -3  -5  -7  -9 -11 -12 -12 -12
23  -11  -9  -8  -7  -6  -5  -5  -4   -4  -5  -7  -8  -7  -5  -3  -1   -2  -3  -3  -4  -2  -3  -4  -6
24   -8  -8  -6  -5  -5  -4  -1   1    3   5   4   2   2   1   0   1    3   3   3   2   2   2   2   3
25    4   3   3   2   2   6   6   6    4   5   8   8   7   9   8   6    4   1   2   3   4   3   5   5

26    4   4   5   5   5   5   6   7    8   6   6   5   8  12  13  16   16  13  11  11   9   7   7   9
27    9  13   7  -6  -4  -2   0  -3   -9 -15 -16 -15 -12  -7   0   0   -3  -7  -8  -5  -4  -1   1   1
28    3   4   6   6   9   9   7 -10  -12 -11  -5  -1   2  -2  -4  -3   -3  -4  -4  -5 -10 -13 -11  -5
29   -2  -1  -1  -4  -6  -7  -6  -6   -6  -5  -2   1   2   1   1   3    4   3   3   1  -2  -4  -5  -5
30   -2   2   7   7   7  10   5   3    2   5   6   7   9   0   4   5    2   3  -1   1  -3  -7  -4  -2