<!--
{
  "availability" : [

  ],
  "documentType" : "symbol",
  "framework" : "WeatherKitRESTAPI",
  "identifier" : "/documentation/WeatherKitRESTAPI/Certainty",
  "metadataVersion" : "0.1.0",
  "role" : "Type",
  "symbol" : {
    "kind" : "Type",
    "modules" : [
      "WeatherKit REST API"
    ],
    "preciseIdentifier" : "data:weather_api:Certainty"
  },
  "title" : "Certainty"
}
-->

# Certainty

How likely the event is to occur.

```
string Certainty
```

## Possible Values

- observed: The event has already occurred or is ongoing.
- likely: The event is likely to occur (greater than 50% probability).
- possible: The event is unlikley to occur (less than 50% probability).
- unlikely: The event is not expected to occur (approximately 0% probability).
- unknown: It is unknown if the event will occur.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)