| Name | Önundarhorn |
| Type | Automated observational station |
| Station number | 6134 |
| WMO number | 4938 |
| Abbreviation | onund |
| Forecast region | South(su) |
| Location | 63°31.450', 19°38.140' (63.5242, 19.6357) |
| Height above sea-level | 12.0 m a.s.l. |
| Beginning of weather observations | 2010 |
| Station owned by | Veðurstofa Íslands |



