My statistical investigation

I was investigating what the Average temperature was for the Afternoon on the 19th of Feb. I found out that the Temperature rised higher at 4 o'clock and dropped at 11 o'clock.
I conclude that when the sun goes down the 
temperature drops with it. 

The easiest chart to read would be the at the top. I think its the easiest because it tells you when it goes higher and when it goes lower.