The minimum outside air temperatures suitable for rhinos to be shut outside will vary considerably with weather conditions for example with wind chill, sunshine or shade etc. It is recommended that enclosures be designed such that animals may be kept outdoors as much as is possible. However, it is not recommended that animals are shut outside for long periods at temperatures < 10oC unless it is sunny and they have access to shelter. Considerably lower temperatures can be tolerated for short periods and many animals even enjoy playing in the snow! Generally it is not recommended to allow animals outside in temperatures less than -5oC even for a very short time.