Unsolicited advice... careful with that line of thinking. We're in CT. We had cold, we had 5 feet of snow this winter. Ticks flourished.... Why? You need an artic spell prior to snow cover and that only works if you've removed fallen leaves and undergrowth from your property. The snow we had prior to our cold weather gave ticks a nice insulated covering to provide protection. Our ticks are worse this year after our very wintery winter. I do expand my timing in the winter... I go 45 days instead of 30... sometimes. Mainly if we are walking less due to salt on the roads.