The number of dates it is possible to enjoy a beer in the sun in Oslo. https://www.yr.no/nn/historikk/graf/0-671/Noreg/Oslo/Oslo/Yr.no owns the data. The picture is private.

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Source: https://www.yr.no/nn/historikk/graf/0-671/Noreg/Oslo/Oslo/Yr.no
Image Alt Text: Antall aktuelle dager for utepils i Oslo