Although the house is now comfortable for you, it is not for any wines you have fermenting. The result is that wine’s temperature will drop which can effect your fermentation rate, your wines ability to clear and can make it more difficult to degas.
Remember, your house’s thermostat is only accurate in the room/area that it’s in. If your thermostat is in a warmer area of your home- the temperature is going to be even cooler in the other areas of your home as the air conditioner churns out it’s sweet relief.
My advise is to use a Brew Belt. This handy electric belt wraps around your fermenters and raises the temperature of the must to aid in fermentation. I make wine in my basement and I use a Brew Belt.
Note: A Digital Thermometer is a great way to easily get an accurate measure of the temperature of your carboy. The stick directly on your fermenters and can be read at a glance.
Enjoy the weather!
Bruce, Manager (Wine Sense- Pembina Hwy)