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HTML

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JavaScript

var json0 = {
    "1948": [
        {
            "Seattle": {
                "city": "Seattle",
                "data": {
                    "avg_dew_point": "34",
                    "avg_gust_wind": "",
                    "avg_max_temp": "45",
                    "avg_min_temp": "35",
                    "avg_precipitation": "0.00",
                    "avg_sea_level_pressure": "30.22",
                    "avg_temp": "40",
                    "avg_wind": "8"
                },
                "month": "1",
                "state": "WA"
            }
        },
        {
            "Chicago": {
                "city": "Chicago",
                "data": {
                    "avg_dew_point": "10",
                    "avg_gust_wind": "",
                    "avg_max_temp": "25",
                    "avg_min_temp": "11",
                    "avg_precipitation": "0.00",
                    "avg_sea_level_pressure": "30.17",
                    "avg_temp": "18",
                    "avg_wind": "12"
                },
                "month": "1",
                "state": "IL"
            }
        }
    ],
    "1949": [
        {
            "Houston": {
                "city": "Houston",
                "data": {
                    "avg_dew_point": "45",
                    "avg_gust_wind": "",
                    "avg_max_temp": "61",
                    "avg_min_temp": "44",
                    "avg_precipitation": "0.00",
                    "avg_sea_level_pressure": "30.15",
                    "avg_temp": "53",
                    "avg_wind": "12"
                },
                "month": "1",
                "state": "TX"
            }
        },
        {
            "Seattle": {
                "city": "Seattle",
                "data": {
                    "avg_dew_point": "25",
                    "avg_gust_wind": "",
                    "avg_max_temp": "38",
                    "avg_min_temp": "25",
                    "avg_precipitation":...