We graph the weather every day as part of our "morning message" routine. Before I show them the temperature, we look at the temp from the day before and estimate if today's will be hotter, the same as, or cooler. And why.
Once we fill up a whole chart (see left), we'll graph it another way. Since the last chart varied from the 50s to the 80s, we'll graph how many days were in the 50s, the 60s, the 70s, and the 80s. Then compare which range had the most (A: 70s), the least (A: 50s), and what the difference was.