Record hot Sun temps in August 2017. Sept 1, 2017 19:04:12 GMT 12 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Bishopdale Weather on Sept 1, 2017 19:04:12 GMT 12 Christchurch had the hottest temp taken in the Sun for an August.The new record is 43.9c.The old record was 41.7c in 2010.