> ## Documentation Index
> Fetch the complete documentation index at: https://docs.usecroma.com/llms.txt
> Use this file to discover all available pages before exploring further.

# SIATA

> Live weather, rainfall and air-quality readings from SIATA stations across the Aburrá Valley (Medellín). Deprecated: replaced by the SIATA Geoportal.

<Warning>
  This endpoint is deprecated since 2026-08-27 and stops answering on 2026-12-01. Use [its successor](/guides/colombia/siata-geoportal), `POST /co/siata-geoportal/weather/v1`, instead.
</Warning>

Queries SIATA (Sistema de Alerta Temprana de Medellín y el Valle de Aburrá) for
the current readings of every monitoring station in the Aburrá Valley: weather
(temperature, humidity, wind, pressure), rainfall (accumulated and intensity),
and air quality (24-hour PM2.5 and ICA index).

`POST /co/siata/v1`

| Field       | Type   | Notes                                                         |
| ----------- | ------ | ------------------------------------------------------------- |
| `latitude`  | number | Optional. -90 to 90. Must be sent together with `longitude`.  |
| `longitude` | number | Optional. -180 to 180. Must be sent together with `latitude`. |
| `radius_km` | number | Optional. Radius in km around the point, 0-100. Default `10`. |

```bash theme={"dark"}
curl https://api.croma.run/co/siata/v1 \
  -H "Authorization: Bearer $CROMA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "latitude": 6.2442, "longitude": -75.5812, "radius_km": 5 }'
```

All fields are optional. An empty body returns every station in the valley;
`latitude` + `longitude` narrows the response to nearby stations, **sorted
nearest first** with `distance_km` populated on each station.

The response groups stations by kind: `meteorology`, `rain` and `air_quality`.
Individual readings are `null` when a station hasn't reported them. Air-quality
values are 24-hour averages; `updated_at` marks the end of the averaging
window. Without a location filter, `distance_km` is `null` on every station.

<Note>
  Coverage is the Medellín metropolitan area (Valle de Aburrá) only. Points
  outside the valley return empty arrays rather than an error.
</Note>

<Card title="Full reference" icon="code" href="/api-reference/overview">
  Schemas, all response fields, and an interactive playground.
</Card>