# Weather Underground

**Canonical:** https://apis.io/providers/wunderground/  
**Website:** https://www.wunderground.com  
**APIs profiled:** 4

Weather Underground operates a personal weather station network of 250,000+ stations worldwide, providing hyperlocal weather data via a REST API. The PWS API (hosted at api.weather.com) offers authenticated access to current conditions, historical observations, 5-day forecasts, and location lookup for registered station contributors. API keys are free for PWS owners who upload data to the network.

## Kin Score — 41.8 / 100 (developing)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 41.8).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 60.5 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 42.1 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 25.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | na |
| Error Semantics | no |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Free · Self-serve signup — onboarding: self-serve, pricing: free, trial: no (confidence: high).

## APIs (4)

- **Weather Underground Forecast API** — Weather forecasts based on PWS location
- **Weather Underground Historical API** — Historical PWS observations and daily summaries
- **Weather Underground Location API** — PWS station location lookup
- **Weather Underground Observations API** — Current and real-time PWS observations

## Agentic access (1)

- **Wunderground Agentic Access** — 8 operations

## Security (3)

- **Wunderground Authentication** — apiKey · 1 scheme
- **Wunderground Domain Security** — TLSv1.3 · DMARC
- **Wunderground Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Wunderground Plans Pricing**

## Tags

Weather, Personal Weather Stations, Hyperlocal, Observations, Forecast, Historical Data, REST API

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/wunderground/). Scores are computed from the provider's own public artifacts under a published rubric.