# Weather and climate data APIs for AI agents

> 9 weather & climate data listings ranked by the Anchor benchmark. Leader Google Weather API (Maps Platform) (B). APIs for current weather, forecasts, historical data and alerts, by coordinates. Compared on forecast range, historical depth, how often data updates, the terms of use and price per thousand calls.

- Canonical: https://www.anchorterminal.com/categories/weather
- Markdown: https://www.anchorterminal.com/categories/weather.md (~3,250 tokens)
- Slim: https://www.anchorterminal.com/categories/weather.min.md (~530 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/categories/weather.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-05

APIs for current weather, forecasts, historical data and alerts, by coordinates. Compared on forecast range, historical depth, how often data updates, the terms of use and price per thousand calls.

- Tools ranked: 9 · agent-ready (BB or better): 0 · accept x402: 0 · hosted endpoints: 9 · desk reviews by the panel: 18
- JSON: https://www.anchorterminal.com/api/v1/tools.json (list) · https://www.anchorterminal.com/api/v1/rankings.json (ranked) · https://www.anchorterminal.com/api/v1/x402.json (payable) · https://www.anchorterminal.com/api/v1/capabilities.json (by capability)
- Grades run AA, A, BB, B, C, D, E, F · methodology: https://www.anchorterminal.com/benchmark/

- Capabilities in this category: weather.current, weather.forecast, weather.historical, weather.alerts, weather.marine
- https://letme.dev/weather.current picks the top-graded tool in this list and says how to call it direct; calling through letme comes later (https://www.anchorterminal.com/letme/index.md)

## Ranking

| # | Tool | Vendor | Kind | Category | Grade | Score | Confidence | x402 | Auth | Where | Reviews | Page |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 151 | Google Weather API (Maps Platform) | Google | HTTP API | Weather | B | 67 | high | no | API key | hosted | 3/5 (2) | https://www.anchorterminal.com/tools/google-weather-api.md |
| 162 | Pirate Weather | Pirate Weather | HTTP API | Weather | B | 66.2 | medium | no | API key | hosted | 4/5 (2) | https://www.anchorterminal.com/tools/pirate-weather.md |
| 169 | WeatherAPI.com | WeatherAPI.com (Zoomash Ltd) | HTTP API | Weather | B | 65.8 | medium | no | API key | hosted | 3.5/5 (2) | https://www.anchorterminal.com/tools/weatherapi-com.md |
| 203 | Open-Meteo | Open-Meteo | HTTP API | Data | B | 63.5 | medium | no | None | hosted | 4/5 (2) | https://www.anchorterminal.com/tools/open-meteo.md |
| 251 | Visual Crossing Weather API | Visual Crossing | HTTP API | Weather | C | 60.3 | medium | no | API key | hosted | 4/5 (2) | https://www.anchorterminal.com/tools/visual-crossing.md |
| 294 | OpenWeather One Call API | OpenWeather | HTTP API | Weather | C | 57.4 | medium | no | API key | hosted | 3.5/5 (2) | https://www.anchorterminal.com/tools/openweather-one-call.md |
| 364 | NOAA National Weather Service API (api.weather.gov) | National Weather Service | HTTP API | Weather | D | 49.9 | medium | no | None | hosted | 4.5/5 (2) | https://www.anchorterminal.com/tools/nws-api.md |
| 372 | AccuWeather Core Weather API + MCP | AccuWeather | HTTP API | Weather | D | 48.8 | medium | no | API key | hosted | 2.5/5 (2) | https://www.anchorterminal.com/tools/accuweather-api.md |
| 399 | Met Office Weather DataHub (Site Specific) | Met Office | HTTP API | Weather | E | 45.5 | medium | no | API key | hosted | 3/5 (2) | https://www.anchorterminal.com/tools/met-office-datahub.md |

Scores are from public evidence against the published checklist (https://www.anchorterminal.com/benchmark/), with Performance and Task success pending. p95 latency and context cost come from our probes, which haven't run yet.

## Summaries

### 151. Google Weather API (Maps Platform), B (67)

Google Maps Platform's API for weather data. Covered by the Maps Platform SLA, 99.9 per cent with service credits. History is 24 hours only, and bulk data isn't available.

- Page: https://www.anchorterminal.com/tools/google-weather-api · Markdown: https://www.anchorterminal.com/tools/google-weather-api.md · JSON: https://www.anchorterminal.com/api/v1/tools/google-weather-api.json
- Capabilities: weather.current, weather.forecast, weather.historical, weather.alerts, data.weather · endpoint: `https://weather.googleapis.com/v1`

### 162. Pirate Weather, B (66.2)

Open-source weather API with Dark Sky-compatible responses, forecasts, alerts and historical data from public weather models. Named model sources and a documented priority order for every field. No SLA, and the terms call it best effort.

- Page: https://www.anchorterminal.com/tools/pirate-weather · Markdown: https://www.anchorterminal.com/tools/pirate-weather.md · JSON: https://www.anchorterminal.com/api/v1/tools/pirate-weather.json
- Capabilities: weather.current, weather.forecast, weather.historical, weather.alerts, data.weather · endpoint: `https://api.pirateweather.net/forecast`

### 169. WeatherAPI.com, B (65.8)

Weather API for current conditions, forecasts, history, marine data, alerts and air quality, queried by location. 3 million calls for $7 a month, and 100,000 a month free with no card. Key only in the query string, and no security.txt.

- Page: https://www.anchorterminal.com/tools/weatherapi-com · Markdown: https://www.anchorterminal.com/tools/weatherapi-com.md · JSON: https://www.anchorterminal.com/api/v1/tools/weatherapi-com.json
- Capabilities: weather.current, weather.forecast, weather.historical, weather.alerts, weather.marine, data.weather · endpoint: `https://api.weatherapi.com/v1`

### 203. Open-Meteo, B (63.5)

Open-source weather API over 30+ national and global weather models, with forecasts, historical reanalysis back to 1940 and no key for non-commercial use. No key or account for non-commercial use, at 600 calls a minute and 10,000 a day. Commercial prices appear only at Stripe checkout.

- Page: https://www.anchorterminal.com/tools/open-meteo · Markdown: https://www.anchorterminal.com/tools/open-meteo.md · JSON: https://www.anchorterminal.com/api/v1/tools/open-meteo.json
- Capabilities: data.weather · endpoint: `https://api.open-meteo.com/v1/forecast`

### 251. Visual Crossing Weather API, C (60.3)

Weather API for historical conditions, forecasts and climate data by location and date range. History from 1970, current conditions and a 15-day forecast from one endpoint. Key only in the query string on the REST API.

- Page: https://www.anchorterminal.com/tools/visual-crossing · Markdown: https://www.anchorterminal.com/tools/visual-crossing.md · JSON: https://www.anchorterminal.com/api/v1/tools/visual-crossing.json
- Capabilities: weather.current, weather.forecast, weather.historical, weather.alerts, data.weather · endpoint: `https://weather.visualcrossing.com/VisualCrossingWebServices/rest/services/timeline`

### 294. OpenWeather One Call API, C (57.4)

Current weather, minute, hourly and daily forecasts, government alerts and history back to 1979 in one call, billed per call with 1,000 free a day. 1,000 free calls a day, then $0.0015 a call, or $0.001 on the agent lane. The main API takes the key only as the appid query parameter.

- Page: https://www.anchorterminal.com/tools/openweather-one-call · Markdown: https://www.anchorterminal.com/tools/openweather-one-call.md · JSON: https://www.anchorterminal.com/api/v1/tools/openweather-one-call.json
- Capabilities: weather.current, weather.forecast, weather.historical, weather.alerts, data.weather · endpoint: `https://api.openweathermap.org/data/3.0/onecall`

### 364. NOAA National Weather Service API (api.weather.gov), D (49.9)

The US government's own forecast, alert and observation feed, free, keyless and public domain. Free, no key and no account, with public domain data. US and territories only.

- Page: https://www.anchorterminal.com/tools/nws-api · Markdown: https://www.anchorterminal.com/tools/nws-api.md · JSON: https://www.anchorterminal.com/api/v1/tools/nws-api.json
- Capabilities: weather.current, weather.forecast, weather.alerts, data.weather · endpoint: `https://api.weather.gov`

### 372. AccuWeather Core Weather API + MCP, D (48.8)

Weather API for current conditions, forecasts, alerts and radar imagery, with an official read-only MCP server. Official hosted MCP server, 26 read-only tools, same key as the REST API. Terms forbid using the data to train, validate or otherwise inform any AI system.

- Page: https://www.anchorterminal.com/tools/accuweather-api · Markdown: https://www.anchorterminal.com/tools/accuweather-api.md · JSON: https://www.anchorterminal.com/api/v1/tools/accuweather-api.json
- Capabilities: weather.current, weather.forecast, weather.alerts, data.weather · endpoint: `https://dataservice.accuweather.com`

### 399. Met Office Weather DataHub (Site Specific), E (45.5)

The UK national weather service's point forecast API. Statutory UK weather service, with a FAQ licence to copy, publish and adapt the data. No OpenAPI, llms.txt, SDK or MCP server.

- Page: https://www.anchorterminal.com/tools/met-office-datahub · Markdown: https://www.anchorterminal.com/tools/met-office-datahub.md · JSON: https://www.anchorterminal.com/api/v1/tools/met-office-datahub.json
- Capabilities: weather.current, weather.forecast, weather.alerts, data.weather · endpoint: `https://data.hub.api.metoffice.gov.uk/sitespecific/v0/point`

## How we test this category

The same locations queried for current conditions, a 10-day forecast and a year of history. We check what each returns, how often it updates, the licence terms and the cost per thousand calls. This test hasn't run yet, so Task success is pending and the grades here come from the categories assessed from public evidence.

## Indexed, not reviewed (15)

Sorted into this category from public catalogues, with facts and our own checks but no score, grade or rank (https://www.anchorterminal.com/indexed/index.md).

| Listing | Kind | What it does | Why it's here |
| --- | --- | --- | --- |
| [aboard](https://www.anchorterminal.com/tools/untype-aboard.md) | MCP server | Falsifiable claims about systemic problems: causal graph, forecasts, dossiers. | vendor's own |
| [APIVerve](https://www.anchorterminal.com/tools/apiverve-mcp-server.md) | MCP server | 350+ production-ready APIs through one MCP server — weather, geocoding, validation, financial data. | vendor's own |
| [au-weather-mcp](https://www.anchorterminal.com/tools/ausdata-au-weather-mcp.md) | MCP server | Query Australian weather + air quality — forecasts, current obs, 80yr archive (BOM). | vendor's own |
| [Clarigrid](https://www.anchorterminal.com/tools/clarigrid.md) | MCP server | Read-only electricity, gas, and weather data with structured provenance and units. | vendor's own |
| [Crosby, TX Weather](https://www.anchorterminal.com/tools/crosbynews-weather.md) | MCP server | Crosby, TX weather, air quality, tropics, floods, fishing, pollen, burn bans, radar, news & schools. | vendor's own |
| [GoldBean MCP Server](https://www.anchorterminal.com/tools/goldbean-api-goldbean-mcp.md) | MCP server | 49 pay-per-use APIs for AI agents via x402. AI, crypto, DeFi, blockchain, weather, search, security. | vendor's own |
| [lp-copilot](https://www.anchorterminal.com/tools/theaslangroupllc-lp-copilot.md) | MCP server | LP copilot: free position enumeration on 7 chains + paid range backtests, IL forecasts, points EV | vendor's own |
| [Macroaxis Financial Data](https://www.anchorterminal.com/tools/macroaxis-api.md) | MCP server | Financial market, fundamental, valuation, risk, ownership, forecast, and portfolio tools. | vendor's own |
| [mu](https://www.anchorterminal.com/tools/micro-mu.md) | MCP server | News, web search, mail, markets, weather, places, files, calendar, contacts. 67 tools, one endpoint. | vendor's own, widely used |
| [Nausika](https://www.anchorterminal.com/tools/nausika-mcp.md) | MCP server | Mediterranean marine, nautical, sailing: forecasts, tides, sea routes, anchorages, POIs for AI. | vendor's own |
| [ParseAPI](https://www.anchorterminal.com/tools/parseapi-mcp.md) | MCP server | Official ParseAPI MCP. Place, IP, email, phone, weather, currency lookups. | vendor's own |
| [plantrip](https://www.anchorterminal.com/tools/plantrip.md) | MCP server | Travel planning: day-by-day itineraries, packing lists, weather insights, and trip cost estimates | vendor's own |
| [RoboSystems](https://www.anchorterminal.com/tools/robosystems.md) | MCP server | Accounting knowledge graphs: SEC XBRL filings, QuickBooks ledgers, reports and forecasts over MCP. | vendor's own |
| [SnowSure — Snow & Ski](https://www.anchorterminal.com/tools/snowsure-snow.md) | MCP server | Live ski snow, multi-model forecasts, powder rankings & a grounded Answer Engine for 500+ resorts. | vendor's own |
| [store](https://www.anchorterminal.com/tools/yaktool-store.md) | MCP server | Forecast a WooCommerce CSV import and migrate Shopify exports. 61 documented rules. | vendor's own |