Assertion: zone's temperature | /r/HasProperty | calculated for each day of the year
Facets:
Source sentences:
text: Number of days/year with 24-hour average temperature at least 10 °C; based on average temperature calculated for each day of the year giving a smooth curve; by this definition summer starts 12 May in Oslo and Bergen, 21 May in Trondheim and 11 June in Bardufoss.