Research by the council shows 33 per cent of mountaineering fatalities occur in December.
Daisley said the high figure correlated with some of the best times to go climbing.
"Summer is a traditional time to go mountaineering, so it's natural that there will be a corresponding rise in incidents.
"Mountaineers are in a high risk, high reward environment. There are very few individuals who go into this environment on a whim having no understanding of the risks."
Daisley wants to make sure that mountaineers are aware that the risk is real and that accidents can happen to anyone.
"We're reminding this community to plan for an appropriate level of risk, which is often a fine line to walk," he said.
"We urge those going out this year to double down on your safety measures and make sure you make it home."
Last week two injured climbers were rescued after they fell 200m on Mt Aspiring. They were on the southwest route and fell down a steep area of snow and ice above the Bonar Glacier.
A second party of four climbers travelling in a similar direction found them two hours later. They set off their personal locator beacon to get help.
Mt Aspiring is known to be a technically difficult climb. The northwest ridge is the most commonly climbed route on the 3000m peak.
A 24-year-old woman died last year when she fell crossing a waterfall face in Mt Aspiring National Park. A 21-year-old man slipped and fell to his death in 2014.
In 2008, Kathmandu co-founder John Pawson, 48, fell 800m to his death on Mt Aspiring. The well-known Wanaka businessman was climbing the southwest ridge of the mountain with award-winning photographer and writer Martin Hill when he fell.
The pair were not roped together and Hill was left stranded about 200m from the summit.
In 2005, three people died on the mountain in 10 days.
