Historical Daily High Temperature by Airport

{
  "type": "object",
  "required": [
    "end_date",
    "station_id",
    "timezone_name",
    "start_date"
  ],
  "properties": {
    "end_date": {
      "type": "string",
      "description": "End date in YYYYMMDD format."
    },
    "start_date": {
      "type": "string",
      "description": "Start date in YYYYMMDD format."
    },
    "station_id": {
      "type": "string",
      "description": "Airport station ICAO code (e.g. EFHK, KJFK). Obtain from search endpoint's icaoCode field."
    },
    "country_code": {
      "type": "string",
      "description": "Two-letter ISO country code for the station (e.g. FI, US)."
    },
    "timezone_name": {
      "type": "string",
      "description": "IANA timezone name for local date grouping (e.g. Europe/Helsinki, America/New_York). DST transitions are handled automatically."
    }
  },
  "additionalProperties": false
}

{
  "type": "object",
  "properties": {
    "data": {
      "type": "object",
      "properties": {
        "provenance": {
          "type": "string",
          "description": "How the daily maximum was computed from raw readings, e.g. 'DERIVED_FROM_ROWS' (computed from individual observation rows rather than a pre-aggregated daily summary the upstream vendor supplied directly)."
        },
        "daily_maxima": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "date": {
                "type": "string",
                "description": "Local calendar date, YYYY-MM-DD."
              },
              "max_temp_c": {
                "type": "number",
                "description": "Maximum temperature for the day, Celsius."
              },
              "duplicate_count": {
                "type": "number",
                "description": "Duplicate readings detected and folded into this day's summary."
              },
              "observation_count": {
                "type": "number",
                "description": "How many raw observations were recorded for the day."
              },
              "largest_gap_minutes": {
                "type": "number",
                "description": "Largest gap, in minutes, between consecutive observations that day."
              },
              "max_observed_at_utc": {
                "type": "string",
                "description": "ISO 8601 UTC timestamp of the maximum reading."
              },
              "max_observed_at_local": {
                "type": "string",
                "description": "ISO 8601 timestamp with the station's local UTC offset."
              },
              "last_observed_at_local": {
                "type": "string",
                "description": "ISO 8601 timestamp of the day's last observation, local offset."
              },
              "first_observed_at_local": {
                "type": "string",
                "description": "ISO 8601 timestamp of the day's first observation, local offset."
              }
            },
            "additionalProperties": true
          },
          "description": "One entry per local calendar day in the requested range."
        },
        "data_source_note": {
          "type": "string",
          "description": "A data-quality caveat about the underlying observation source, e.g. 'UNVERIFIED_TWC_AIRPORT_HISTORY_PROXY' -- the historical data has not been independently cross-checked against a second source."
        },
        "request_metadata": {
          "type": "object",
          "properties": {
            "warnings": {
              "type": "array",
              "items": {
                "type": "string"
              },
              "description": "Observed as an empty array on the one real call with data; the shape of a populated entry is unconfirmed."
            },
            "row_count": {
              "type": "number",
              "description": "Number of daily entries in daily_maxima."
            },
            "retrieved_at": {
              "type": "string",
              "description": "ISO 8601 UTC timestamp of when the upstream data was fetched."
            },
            "timezone_name": {
              "type": "string",
              "description": "Echoes the input's IANA timezone name."
            },
            "requested_end_date": {
              "type": "string",
              "description": "Echoes the input's end_date, YYYYMMDD."
            },
            "requested_start_date": {
              "type": "string",
              "description": "Echoes the input's start_date, YYYYMMDD."
            }
          },
          "additionalProperties": true
        }
      },
      "description": "Present only when the requested range has recorded observations.",
      "additionalProperties": true
    },
    "status": {
      "type": "string",
      "description": "'success' on the one real call observed that returned data."
    }
  },
  "description": "The daily-maxima record, as returned at routing.responseResultPath. Absent entirely (shapes to {}) for a date range with no observations recorded yet, as observed for a future date range.",
  "additionalProperties": true
}