Winter on the Rainbow River

The sun is shining and the water comes gushing out of the Big Blue Aquifer, to feed this river, at 73 degrees, summer and winter. I don't know how long it will take to cool down tomorrow morning as the temperature will be 19f (-7c), and taking the wind chill factor into consideration, it will be 12f (-11c). I really don't have clothes for this sort of weather. Better stay in bed. I guess!