for ($z = 0; $z < 25; $z++){
  $currentKeyValues[] = $json[data][$z][values][0];

if ($z % 12 == 0 and $z != 0) {
  $currentKeyName[] = $json[data][$z][key][0];
  $currentKeyNameString = $currentKeyName[0];
  ${"cityID$currentKeyNameString"} = array_merge(array($currentKeyName,
  $currentKeyValues));
  }
}

[
{
0: {
0: "0114",
1: "0115"
},
1: {
0: "91.4",
1: "92.4",
2: "91.0",
3: "92.0",
4: "89.6",
5: "85.4",
6: "86.8",
7: "86.4",
8: "80.1",
9: "79.1",
10: "80.2",
11: "83.2",
12: "84.1",
13: "93.3",
14: "94.2",
15: "92.4",
16: "92.9",
17: "91.8",
18: "87.5",
19: "89.3",
20: "89.0",
21: "83.6",
22: "82.8",
23: "85.9",
24: "87.6"
}
}
]

[
{
0: {
0: "0114"
},
1: {
0: "91.4",
1: "92.4",
2: "91.0",
3: "92.0",
4: "89.6",
5: "85.4",
6: "86.8",
7: "86.4",
8: "80.1",
9: "79.1",
10: "80.2",
11: "83.2",
12: "84.1"
}
}
]