openapi: 3.1.0
info:
  title: OpenWeatherMap Forecast APIs
  version: 2.5.0
  description: >-
    OpenWeather forecast APIs including 5-day/3-hour forecast, Hourly Forecast
    4 Days, Daily Forecast 16 Days, and Climatic Forecast 30 Days. These
    forecasts provide weather predictions at varying granularities and time
    horizons for any global coordinate.
  contact:
    name: OpenWeather
    url: https://openweathermap.org/api
  license:
    name: Creative Commons Attribution-ShareAlike 4.0 International
    url: https://creativecommons.org/licenses/by-sa/4.0/
servers:
  - url: https://api.openweathermap.org/data/2.5
    description: 5-day/3-hour Forecast API base URL
  - url: https://pro.openweathermap.org/data/2.5
    description: Pro forecast APIs base URL (Hourly Forecast 4 Days, Daily Forecast 16 Days, Climatic Forecast 30 Days)
paths:
  /forecast:
    get:
      operationId: getForecastFiveDay
      summary: Five Day Three Hour Forecast
      description: >-
        Returns forecast weather data with 3-hour granularity for the next 5 days
        for the supplied latitude and longitude. Includes temperature, weather
        conditions, wind, precipitation probability, and more for 40 forecast
        timestamps.
      tags:
        - Forecast
      parameters:
        - $ref: '#/components/parameters/Lat'
        - $ref: '#/components/parameters/Lon'
        - name: cnt
          in: query
          required: false
          description: Number of timestamps to return. Defaults to 40.
          schema:
            type: integer
            minimum: 1
            maximum: 40
        - $ref: '#/components/parameters/Mode'
        - $ref: '#/components/parameters/Units'
        - $ref: '#/components/parameters/Lang'
        - $ref: '#/components/parameters/Appid'
      responses:
        '200':
          description: Five day three hour forecast response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ForecastResponse'
        '400':
          description: Invalid request parameters.
        '401':
          description: Unauthorized. Missing or invalid API key.
        '404':
          description: Location not found.
        '429':
          description: Too many requests.
  /forecast/hourly:
    get:
      operationId: getForecastHourly
      summary: Four Day Hourly Forecast
      description: >-
        Returns hourly forecast weather data for the next 4 days (up to 96
        hourly timestamps) for the supplied latitude and longitude. Available
        on Developer, Professional, and Expert plans.
      tags:
        - Forecast
      servers:
        - url: https://pro.openweathermap.org/data/2.5
      parameters:
        - $ref: '#/components/parameters/Lat'
        - $ref: '#/components/parameters/Lon'
        - name: cnt
          in: query
          required: false
          description: Number of hourly timestamps to return. Up to 96.
          schema:
            type: integer
            minimum: 1
            maximum: 96
        - $ref: '#/components/parameters/Mode'
        - $ref: '#/components/parameters/Units'
        - $ref: '#/components/parameters/Lang'
        - $ref: '#/components/parameters/Appid'
      responses:
        '200':
          description: Hourly forecast response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ForecastResponse'
        '400':
          description: Invalid request parameters.
        '401':
          description: Unauthorized.
        '429':
          description: Too many requests.
  /forecast/daily:
    get:
      operationId: getForecastDaily
      summary: Sixteen Day Daily Forecast
      description: >-
        Returns daily forecast weather data for up to 16 days for the supplied
        latitude and longitude. Each daily entry includes morning, day,
        evening, night, and min/max temperatures.
      tags:
        - Forecast
      servers:
        - url: https://pro.openweathermap.org/data/2.5
      parameters:
        - $ref: '#/components/parameters/Lat'
        - $ref: '#/components/parameters/Lon'
        - name: cnt
          in: query
          required: false
          description: Number of days to return. 1 to 16.
          schema:
            type: integer
            minimum: 1
            maximum: 16
        - $ref: '#/components/parameters/Mode'
        - $ref: '#/components/parameters/Units'
        - $ref: '#/components/parameters/Lang'
        - $ref: '#/components/parameters/Appid'
      responses:
        '200':
          description: Daily forecast response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DailyForecastResponse'
        '400':
          description: Invalid request parameters.
        '401':
          description: Unauthorized.
        '429':
          description: Too many requests.
  /forecast/climate:
    get:
      operationId: getForecastClimate
      summary: Thirty Day Climatic Forecast
      description: >-
        Returns daily climatic forecast weather data for the next 30 days for
        the supplied latitude and longitude.
      tags:
        - Forecast
      servers:
        - url: https://pro.openweathermap.org/data/2.5
      parameters:
        - $ref: '#/components/parameters/Lat'
        - $ref: '#/components/parameters/Lon'
        - name: cnt
          in: query
          required: false
          description: Number of days to return. 1 to 30.
          schema:
            type: integer
            minimum: 1
            maximum: 30
        - $ref: '#/components/parameters/Mode'
        - $ref: '#/components/parameters/Units'
        - $ref: '#/components/parameters/Lang'
        - $ref: '#/components/parameters/Appid'
      responses:
        '200':
          description: Climatic forecast response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DailyForecastResponse'
        '400':
          description: Invalid request parameters.
        '401':
          description: Unauthorized.
        '429':
          description: Too many requests.
components:
  parameters:
    Lat:
      name: lat
      in: query
      required: true
      description: Latitude in decimal degrees, range -90 to 90.
      schema:
        type: number
        format: float
    Lon:
      name: lon
      in: query
      required: true
      description: Longitude in decimal degrees, range -180 to 180.
      schema:
        type: number
        format: float
    Mode:
      name: mode
      in: query
      required: false
      description: Response format. Default is JSON.
      schema:
        type: string
        enum:
          - json
          - xml
    Units:
      name: units
      in: query
      required: false
      description: Units of measurement. standard, metric, or imperial.
      schema:
        type: string
        enum:
          - standard
          - metric
          - imperial
    Lang:
      name: lang
      in: query
      required: false
      description: Localization language code.
      schema:
        type: string
    Appid:
      name: appid
      in: query
      required: true
      description: OpenWeather API key.
      schema:
        type: string
  schemas:
    City:
      type: object
      properties:
        id:
          type: integer
        name:
          type: string
        coord:
          type: object
          properties:
            lat:
              type: number
              format: float
            lon:
              type: number
              format: float
        country:
          type: string
        population:
          type: integer
        timezone:
          type: integer
        sunrise:
          type: integer
          format: int64
        sunset:
          type: integer
          format: int64
    Weather:
      type: object
      properties:
        id:
          type: integer
        main:
          type: string
        description:
          type: string
        icon:
          type: string
    ForecastItem:
      type: object
      properties:
        dt:
          type: integer
          format: int64
        main:
          type: object
          properties:
            temp:
              type: number
              format: float
            feels_like:
              type: number
              format: float
            temp_min:
              type: number
              format: float
            temp_max:
              type: number
              format: float
            pressure:
              type: integer
            humidity:
              type: integer
        weather:
          type: array
          items:
            $ref: '#/components/schemas/Weather'
        clouds:
          type: object
          properties:
            all:
              type: integer
        wind:
          type: object
          properties:
            speed:
              type: number
              format: float
            deg:
              type: integer
            gust:
              type: number
              format: float
        visibility:
          type: integer
        pop:
          type: number
          format: float
        rain:
          type: object
          properties:
            3h:
              type: number
              format: float
        snow:
          type: object
          properties:
            3h:
              type: number
              format: float
        sys:
          type: object
          properties:
            pod:
              type: string
        dt_txt:
          type: string
    ForecastResponse:
      type: object
      properties:
        cod:
          type: string
        message:
          type: number
        cnt:
          type: integer
        list:
          type: array
          items:
            $ref: '#/components/schemas/ForecastItem'
        city:
          $ref: '#/components/schemas/City'
    DailyForecastItem:
      type: object
      properties:
        dt:
          type: integer
          format: int64
        sunrise:
          type: integer
          format: int64
        sunset:
          type: integer
          format: int64
        temp:
          type: object
          properties:
            day:
              type: number
              format: float
            min:
              type: number
              format: float
            max:
              type: number
              format: float
            night:
              type: number
              format: float
            eve:
              type: number
              format: float
            morn:
              type: number
              format: float
        feels_like:
          type: object
          properties:
            day:
              type: number
              format: float
            night:
              type: number
              format: float
            eve:
              type: number
              format: float
            morn:
              type: number
              format: float
        pressure:
          type: integer
        humidity:
          type: integer
        weather:
          type: array
          items:
            $ref: '#/components/schemas/Weather'
        speed:
          type: number
          format: float
        deg:
          type: integer
        gust:
          type: number
          format: float
        clouds:
          type: integer
        rain:
          type: number
          format: float
        snow:
          type: number
          format: float
        pop:
          type: number
          format: float
    DailyForecastResponse:
      type: object
      properties:
        city:
          $ref: '#/components/schemas/City'
        cod:
          type: string
        message:
          type: number
        cnt:
          type: integer
        list:
          type: array
          items:
            $ref: '#/components/schemas/DailyForecastItem'
  securitySchemes:
    appid:
      type: apiKey
      in: query
      name: appid
security:
  - appid: []
tags:
  - name: Forecast
    description: Weather forecasts at multiple granularities and time horizons.