1) Good for rain and shine 1) An all-weather shelter 
The name given to the artificial surface tracks. These offer racing throughout the winter regardless of weather conditions.
[adj] - usable or operative or practiced in all kinds of weather
adjective usable or operative or practiced in all kinds of weather; `a good all-weather road`; `all-weather flying`
designed to operate or be usable in any type of weather: an all-weather coat; an all-weather shelter. · capable of resisting damage from exposure to any climatic conditions; weatherproof: an all-weather paint. · in or including all types of weather: years of all-weather experience in the Arctic.