Reviewed 23 August 2026
Data sources
& licences.
This site publishes historical climate interpretation, not live weather, prices, events, crowds or accommodation inventory. Private travel and affiliate feeds are not used in public output.
| Dataset | Licence | Commercial use | Derivatives |
|---|---|---|---|
| NOAA Global Historical Climatology Network Daily (GHCN-Daily)Historical daily station observations are aggregated into 1991–2020 monthly normals. We show the station identifier, name, distance and coverage rather than presenting the values as a forecast. | US federal public-domain data | Yes | Yes |
| GeoNames geographical databasePlace names, stable GeoNames IDs and coordinates identify the settlement to which a nearby station is matched. GeoNames attribution is retained on destination pages. | CC BY 4.0 | Yes | Yes |
| NOAA Optimum Interpolation Sea Surface Temperature (OISST) v2.1Where available, the 1991–2020 open-water monthly climatology is shown as contextual sea temperature. It is not a local bay measurement or a live condition. | US federal public-domain data | Yes | Yes |
How the evidence is handled
We calculate monthly summaries only where the nearby station and each month meet the coverage checks. A place without enough evidence remains searchable, but does not receive a climate answer. Derived values are labelled as historical or calculated; they are never presented as a prediction.
We do not publish raw source archives or claim a public downloadable dataset. Holding an object in storage is not treated as permission to republish it.