openapi: 3.1.0
info:
  title: OpenWeatherMap Accumulated Parameters Statistical Weather API
  version: 2.5.0
  description: Returns accumulated temperature and accumulated precipitation totals over a user-specified historical time window. Targeted at agricultural and energy-sector applications. Available on Professional and Expert plans.
  contact:
    name: OpenWeather
    url: https://openweathermap.org/api/accumulated-parameters
  license:
    name: Creative Commons Attribution-ShareAlike 4.0 International
    url: https://creativecommons.org/licenses/by-sa/4.0/
servers:
- url: https://history.openweathermap.org/data/2.5/history
  description: Accumulated Parameters API base URL
security:
- appid: []
tags:
- name: Statistical Weather
  description: Long-term statistical weather aggregates for any global location.
paths:
  /aggregated/year:
    get:
      operationId: getStatisticalAggregatedYear
      summary: Yearly Aggregated Weather Statistics
      description: Returns 365 groups of statistical weather data for each day of the calendar year for the supplied coordinates.
      tags:
      - Statistical Weather
      parameters:
      - $ref: '#/components/parameters/Lat'
      - $ref: '#/components/parameters/Lon'
      - $ref: '#/components/parameters/Appid'
      responses:
        '200':
          description: Yearly statistics response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/StatisticalResponse'
        '400':
          description: Invalid request parameters.
        '401':
          description: Unauthorized.
        '429':
          description: Too many requests.
  /aggregated/month:
    get:
      operationId: getStatisticalAggregatedMonth
      summary: Monthly Aggregated Weather Statistics
      description: Returns aggregated monthly weather statistics for the supplied coordinates and month.
      tags:
      - Statistical Weather
      parameters:
      - $ref: '#/components/parameters/Lat'
      - $ref: '#/components/parameters/Lon'
      - name: month
        in: query
        required: true
        description: Month of the year, 1-12.
        schema:
          type: integer
          minimum: 1
          maximum: 12
      - $ref: '#/components/parameters/Appid'
      responses:
        '200':
          description: Monthly statistics response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/StatisticalResponse'
        '400':
          description: Invalid request parameters.
        '401':
          description: Unauthorized.
        '429':
          description: Too many requests.
  /aggregated/day:
    get:
      operationId: getStatisticalAggregatedDay
      summary: Daily Aggregated Weather Statistics
      description: Returns aggregated daily weather statistics for the supplied coordinates, month, and day.
      tags:
      - Statistical Weather
      parameters:
      - $ref: '#/components/parameters/Lat'
      - $ref: '#/components/parameters/Lon'
      - name: month
        in: query
        required: true
        description: Month of the year, 1-12.
        schema:
          type: integer
          minimum: 1
          maximum: 12
      - name: day
        in: query
        required: true
        description: Day of the month, 1-31.
        schema:
          type: integer
          minimum: 1
          maximum: 31
      - $ref: '#/components/parameters/Appid'
      responses:
        '200':
          description: Daily statistics response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/StatisticalResponse'
        '400':
          description: Invalid request parameters.
        '401':
          description: Unauthorized.
        '429':
          description: Too many requests.
components:
  schemas:
    StatisticalResult:
      type: object
      properties:
        month:
          type: integer
        day:
          type: integer
        temp:
          $ref: '#/components/schemas/StatisticalParameter'
        pressure:
          $ref: '#/components/schemas/StatisticalParameter'
        humidity:
          $ref: '#/components/schemas/StatisticalParameter'
        wind:
          $ref: '#/components/schemas/StatisticalParameter'
        precipitation:
          $ref: '#/components/schemas/StatisticalParameter'
        clouds:
          $ref: '#/components/schemas/StatisticalParameter'
        sunshine_hours:
          type: number
          format: float
    StatisticalParameter:
      type: object
      properties:
        record_min:
          type: number
          format: float
        record_max:
          type: number
          format: float
        average_min:
          type: number
          format: float
        average_max:
          type: number
          format: float
        median:
          type: number
          format: float
        mean:
          type: number
          format: float
        p25:
          type: number
          format: float
        p75:
          type: number
          format: float
        st_dev:
          type: number
          format: float
        num:
          type: integer
    StatisticalResponse:
      type: object
      properties:
        cod:
          type: integer
        city_id:
          type: integer
        calctime:
          type: number
          format: float
        result:
          oneOf:
          - $ref: '#/components/schemas/StatisticalResult'
          - type: array
            items:
              $ref: '#/components/schemas/StatisticalResult'
  parameters:
    Lat:
      name: lat
      in: query
      required: true
      description: Latitude in decimal degrees.
      schema:
        type: number
        format: float
    Appid:
      name: appid
      in: query
      required: true
      description: OpenWeather API key.
      schema:
        type: string
    Lon:
      name: lon
      in: query
      required: true
      description: Longitude in decimal degrees.
      schema:
        type: number
        format: float
  securitySchemes:
    appid:
      type: apiKey
      in: query
      name: appid