Hong Kong Current Weather Report: Temperature, Humidity, Rainfall, UV Index (Hong Kong Observatory)

hko/current-weather

The Hong Kong Observatory's current weather report for Hong Kong: air temperature at about two dozen weather stations in degrees Celsius, relative humidity at the Observatory, rainfall over the past hour in millimetres for each of the 18 districts, the UV index with its description, weather icon codes and the text of any warning in force, with the time each block was recorded (Hong Kong time, UTC+8). lang is en, tc (Traditional Chinese) or sc (Simplified Chinese) and sets the language of place names and text. Hong Kong Observatory data, passed through unmodified and served by Eden Engine; not an official Hong Kong Observatory product.

activeper callv1

Price

$0.0026 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $5.

Data source

Hong Kong Observatory

Source: Hong Kong Observatory, The Government of the Hong Kong Special Administrative Region, via DATA.GOV.HK. The Government and the Hong Kong Observatory own the intellectual property rights in the data. Served by Eden Engine; not an official Hong Kong Observatory product.

Use it

Five steps: search, inspect, learn, run, settle. No per-tool setup; your agent reaches this tool through the meta-tools it already has.

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agent

// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "hko/current-weather" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "hko/current-weather" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "hko/current-weather", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "hko/current-weather", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

Not connected yet? Point your MCP client at https://mcp.eden-engine.com/mcp, then copy a config for your client.

Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0026

Updated: Oct 20, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "lang"
  ],
  "properties": {
    "lang": {
      "enum": [
        "en",
        "tc",
        "sc"
      ],
      "type": "string",
      "description": "Language of place names and text: en (English), tc (Traditional Chinese) or sc (Simplified Chinese)."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "updateTime",
    "temperature",
    "humidity",
    "rainfall"
  ],
  "properties": {
    "icon": {
      "type": "array",
      "items": {
        "type": "integer"
      },
      "description": "Weather icon codes for the current conditions."
    },
    "uvindex": {
      "type": "object",
      "description": "UV index: `data` is a list of `place`, `value` and `desc` (a word such as moderate); `recordDesc` says which period it covers. May be an empty string when no reading is reported.",
      "additionalProperties": true
    },
    "humidity": {
      "type": "object",
      "properties": {
        "data": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "unit": {
                "type": "string"
              },
              "place": {
                "type": "string"
              },
              "value": {
                "type": "number"
              }
            },
            "additionalProperties": true
          }
        },
        "recordTime": {
          "type": "string"
        }
      },
      "description": "Relative humidity: `data` is a list of `place`, `value` (a number) and `unit` (percent); `recordTime` is when it was read.",
      "additionalProperties": true
    },
    "rainfall": {
      "type": "object",
      "properties": {
        "data": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "max": {
                "type": "number"
              },
              "main": {
                "type": "string"
              },
              "unit": {
                "type": "string"
              },
              "place": {
                "type": "string"
              }
            },
            "additionalProperties": true
          }
        },
        "endTime": {
          "type": "string"
        },
        "startTime": {
          "type": "string"
        }
      },
      "description": "Rainfall by district between `startTime` and `endTime`: `data` is a list of `place`, `max` (millimetres, a number), `unit` (mm) and `main` (the string \"TRUE\" or \"FALSE\").",
      "additionalProperties": true
    },
    "tcmessage": {
      "description": "Tropical cyclone message. An empty string when there is none."
    },
    "updateTime": {
      "type": "string",
      "description": "When the report was issued, ISO 8601 with a +08:00 (Hong Kong time) offset."
    },
    "temperature": {
      "type": "object",
      "properties": {
        "data": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "unit": {
                "type": "string"
              },
              "place": {
                "type": "string"
              },
              "value": {
                "type": "number"
              }
            },
            "additionalProperties": true
          }
        },
        "recordTime": {
          "type": "string"
        }
      },
      "description": "Air temperature by weather station: `data` is a list of `place`, `value` (a number) and `unit` (C); `recordTime` is when it was read.",
      "additionalProperties": true
    },
    "iconUpdateTime": {
      "type": "string",
      "description": "When the icon codes were last updated."
    },
    "warningMessage": {
      "description": "Text of any warning in force. An empty string when there is none; the shape during a warning is not specified here."
    }
  },
  "description": "The Hong Kong Observatory current weather report.",
  "additionalProperties": true
}