Some combined Seattle weather graphs - from following https://vega.github.io/vega-lite/tutorials/explore.html

seattle-weather.vl.json

{
  "$schema": "https://vega.github.io/schema/vega-lite/v2.json",
  "data": {
    "url": "data/seattle-weather.csv",
    "format": {
      "type": "csv"
    }
  },
  "vconcat": [
    {
      "mark": "line",
      "width": 600,
      "encoding": {
        "x": {
          "timeUnit": "monthyear",
          "field": "date",
          "type": "temporal"
        },
        "y": {
          "aggregate": "mean",
          "field": "precipitation",
          "type": "quantitative"
        }
      }
    },
    {
      "mark": "line",
      "width": 600,
      "encoding": {
        "x": {
          "timeUnit": "yearmonth",
          "field": "date",
          "type": "temporal"
        },
        "y": {
          "aggregate": "max",
          "field": "temp_max",
          "type": "quantitative"
        }
      }
    },
    {
      "mark": "bar",
      "encoding": {
        "x": {
          "timeUnit": "yearmonth",
          "field": "date",
          "type": "ordinal"
        },
        "y": {
          "aggregate": "count",
          "field": "*",
          "type": "quantitative"
        },
        "color": {
          "field": "weather",
          "type": "nominal"
        }
      }
    },
    {
      "mark": "bar",
      "encoding": {
        "x": {
          "bin": {
            "maxbins": 20
          },
          "field": "precipitation",
          "type": "quantitative"
        },
        "y": {
          "aggregate": "count",
          "field": "*",
          "type": "quantitative"
        }
      }
    }
  ]
}