Dan Jarratt just e-mailed me a graph displaying the temperature difference from today until tomorrow, where we focus our attention only on Charleston SC in the month of March over years 1893-2013. Here are the summary statistics:

- n = 3250 day-to-day changes, measured only when dates are in 3/1 to 3/27 over years 1893 to 2013
- Mean = +0.037F, median = +1F
- Standard deviation = 8.39F

**What is this graph telling us?**

- In the month of March, on average it’s going to be 0.037 degrees (F) warmer tomorrow than it is today.
- But half the time, the temperature increases by over 1 degree (F).
- The temperature jumps are roughly normally distributed.
- The cumulative percentile jump of 0 degrees (F) is 49.85%.
- Graphs are neat.