The temperature is "not as ideal" for the spiders as Alexandra, Wanaka and Bannockburn "but still possible for it to survive."
A Ministry for Primary Industries spokeswoman said redbacks are known to have settled in Central Otago and Taranaki and because they are an established species in New Zealand, MPI is not undertaking research or control programmes at present.
"However, where redback finds are reported to the Ministry, and these are associated with recent imports of goods (for example at a port or a facility where containers are unloaded), MPI may further investigate."
Mr McDonald said the drums had been stored in Cromwell and taken to Queenstown over a month ago.
• The redback spider Latrodectus hasselti is native to Australia but has been present in New Zealand since the 1980s.
• They are known to be established in Central Otago and Taranaki.
• The spider has venom which is toxic to people and bites can cause severe pain.
• Medical attention should be sought following a bite.