How Dry is It?

We've just had a relatively wet week, but we've been running way behind in the rainfall department. I'm very interested in how there are clearly two distinct rainfall patterns - this year and 2007 are similar, while 2008 and 2009 were similar in the crucial month of June.

It's running up towards my bedtime now so I'm not going to analyze this further. It just means I really do need to water the trees, which need to make up the shortfall.