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Tomorrow.io Forecast API

Hourly and daily forecast timelines via a simple GET interface.

Tomorrow.io Forecast API is one of 11 APIs that Tomorrow.io publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Forecast. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, authentication docs, and code examples.

This API exposes 1 operation across 1 path, and defines 4 schemas. It is described by OpenAPI 3.2.0, at version 4.0.1.

Requests are made against a single base URL, https://api.tomorrow.io/v4.

1 operations 1 paths 4 schemas 1 GET

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
4.0.1
Base URL
https://api.tomorrow.io/v4
Authentication
API Key
Resource Areas
1

Authentication & Security 1

Tomorrow.io Forecast API declares 1 security scheme for authenticating requests. An API key is passed in the query as apikey (apiKeyQuery). By default, every request must be authenticated.

  • apiKeyQuery — Tomorrow.io API key passed as apikey query parameter. Obtain at https://app.tomorrow.io/development/keys.

Paths & Operations 1

Across 1 path, the API surfaces 1 operation — 1 GET. Each is listed below with its method, path, parameters, and response codes.

Forecast 1

Hourly and daily forecast timelines via a simple GET interface.

GET
/weather/forecast
Tomorrow.io Get Weather Forecast
getWeatherForecast 3 params → 200400401429

Schemas 4

The contract defines 4 schemas that model the data the API accepts and returns. The most detailed are WeatherValues (37 properties), Error (3 properties), ForecastResponse (2 properties), TimelineInterval (2 properties). Each schema is shown below with its type and property counts.

WeatherValues
object
Map of weather data field names to numeric values for one timestep.
37 properties
TimelineInterval
object
A single timestep entry in a timeline.
2 properties
Error
object
Standard Tomorrow.io error envelope.
3 properties 3 required
ForecastResponse
object
2 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

tomorrow-forecast-api-openapi.yml Raw ↑

Other APIs Tomorrow.io publishes across the network.

Tomorrow.io Alerts API
Tomorrow.io Climate API
Tomorrow.io Events API
Tomorrow.io Historical API
Tomorrow.io Insights API
Tomorrow.io Locations API
Tomorrow.io Map Tiles API
Tomorrow.io Realtime API
Tomorrow.io Routes API
Tomorrow.io Timelines API
Where this information came from

This is an independent, third-party profile of Tomorrow.io Forecast API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

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