We are going through a some very cold weather now in Minnesota. During late January, I start to daydream about warm weather. While daydreaming about going to my lake cabin today, I started to wonder when the average daily temperature in Minneapolis begins to increase (Minneapolis is the nearest large city to me). So I decided to go out to the Weather Underground and download the Minneapolis weather data since 1990, compute the daily averages, and smooth the data. I plotted this data in Figure 1. The minimum average daily temperature occurs on the 19th of January. So our daily average temperature is now increasing. That makes me feel like warm weather is not too far away.
Figure 1: Daily Average Minneapolis Temperatures During the Coldest Part of Winter.