Dark Sky website screenshot

Dark Sky

Dark Sky is a hyperlocal weather forecast REST API (now part of Apple) that provided minute-by-minute precipitation forecasts, hourly weather conditions, and multi-day outlooks powered by machine-learning models. The API delivered real-time and historical weather data for any latitude and longitude worldwide, including current conditions, 60-minute minutely precipitation intensity, 48-hour hourly forecasts, and 7-day daily summaries. It was acquired by Apple in March 2020; new developer signups closed immediately, and the API was permanently shut down on March 31, 2023. Apple's WeatherKit REST API is the successor service.

Dark Sky publishes 2 APIs on the APIs.io network: Forecast API and Time Machine API. Tagged areas include Weather, Forecast, Hyperlocal, Precipitation, and Machine Learning.

The Dark Sky catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Dark Sky’s developer surface includes authentication, documentation, engineering blog, pricing, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub
50.0/100 developing ▬ flat Agent 44/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreeSelf serve⚡ Free to try
2 APIs
WeatherForecastHyperlocalPrecipitationMachine LearningRESTApple

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 50.0/100 · developing
Contract Quality 18.4 / 25
Developer Ergonomics 4.3 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 5.5 / 13
Governance 7.0 / 12
Discoverability 6.9 / 10
Agent readiness — 44/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/dark-sky: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 2

Individual APIs this provider publishes, each with its own machine-readable definition.

Dark Sky Forecast API

Current and forecast weather data for a given location

Dark Sky Time Machine API

Historical or future weather data for a specific point in time

Pricing Plans 1

Published pricing tiers and plan structures.

Dark Sky Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Dark Sky Rate Limits

2 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Dark Sky Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Dark Sky Context

0 classes · 46 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Dark Sky API Rules

6 rules · 4 warnings 2 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

Dark Sky Forecast Response

10 properties

JSON SCHEMA

Examples 2

Example request and response payloads for these APIs.

Forecast Response

10 fields

EXAMPLE

Time Machine Response

8 fields

EXAMPLE

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Dark Sky Authentication

apiKey · 1 scheme

SECURITY

Dark Sky Domain Security

TLSv1.3

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Dark Sky Agentic Access

2 operations

2 operations · 0 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg
GitHubOrg

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage
StatusPage
 RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans
 FinOps
FinOps

Company 3

The organization behind the API

Website
Website
 LinkedIn
LinkedIn
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

X
X

Source (apis.yml)

apis.yml Raw ↑ 
aid: dark-sky
name: Dark Sky
description: 'Dark Sky is a hyperlocal weather forecast REST API (now part of Apple) that provided minute-by-minute precipitation
  forecasts, hourly weather conditions, and multi-day outlooks powered by machine-learning models. The API delivered real-time
  and historical weather data for any latitude and longitude worldwide, including current conditions, 60-minute minutely precipitation
  intensity, 48-hour hourly forecasts, and 7-day daily summaries. It was acquired by Apple in March 2020; new developer signups
  closed immediately, and the API was permanently shut down on March 31, 2023. Apple''s WeatherKit REST API is the successor
  service.

  '
accessModel:
  pricing: free
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Free · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/dark-sky.png
url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
tags:
- Weather
- Forecast
- Hyperlocal
- Precipitation
- Machine Learning
- REST
- Apple
apis:
- aid: dark-sky:dark-sky-forecast-api
  name: Dark Sky Forecast API
  description: Current and forecast weather data for a given location
  humanURL: https://darksky.net/dev/docs
  baseURL: https://api.darksky.net
  tags:
  - Forecast
  properties:
  - type: OpenAPI
    url: openapi/dark-sky-forecast-api-openapi.yml
  - type: Documentation
    url: https://darksky.net/dev/docs
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/json-schema/dark-sky-forecast-response.json
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/examples/forecast-response.json
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/examples/time-machine-response.json
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/vocabulary/dark-sky-vocabulary.json
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/json-ld/dark-sky-context.jsonld
- aid: dark-sky:dark-sky-time-machine-api
  name: Dark Sky Time Machine API
  description: Historical or future weather data for a specific point in time
  humanURL: https://darksky.net/dev/docs
  baseURL: https://api.darksky.net
  tags:
  - Time Machine
  properties:
  - type: OpenAPI
    url: openapi/dark-sky-time-machine-api-openapi.yml
  - type: Documentation
    url: https://darksky.net/dev/docs
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/json-schema/dark-sky-forecast-response.json
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/examples/forecast-response.json
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/examples/time-machine-response.json
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/vocabulary/dark-sky-vocabulary.json
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/dark-sky/refs/heads/main/json-ld/dark-sky-context.jsonld
common:
- type: AgenticAccess
  url: agentic-access/dark-sky-agentic-access.yml
- type: DomainSecurity
  url: security/dark-sky-domain-security.yml
- type: Authentication
  url: authentication/dark-sky-authentication.yml
- type: Website
  url: https://darksky.net
- type: Documentation
  url: https://darksky.net/dev/docs
- type: GitHubOrg
  url: https://github.com/darkskyapp
- type: LinkedIn
  url: https://www.linkedin.com/company/dark-sky
- type: Blog
  url: https://blog.darksky.net
- type: Pricing
  url: https://darksky.net/dev
- type: StatusPage
  url: https://darksky.net/dev/console
- type: X
  url: https://x.com/darkskyapp
- type: Plans
  url: plans/dark-sky-plans-pricing.yml
- type: RateLimits
  url: rate-limits/dark-sky-rate-limits.yml
- type: FinOps
  url: finops/dark-sky-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com