Before you read this, you should read the article about our XML forecast.
This article explains the content of the XMLs containing the forecasts from yr.no, e.g. yr.no/place/Norge/Oslo/Oslo/Blindern/forecast.xml and yr.no/place/Norge/Oslo/Oslo/Blindern/forecast_hour_by_hour.xml.
You need to be familiar with XML and coding to understand this article.
The node has information about the official location name, type of location, country and time zone. Timezone has the name of time zone and deviation per minute compared with UTC time. All times are local.
Location/Location contains information about latitude/longitude, altitude + information about what database yr.no has used to place the city.