This was an interesting post, especially with the two week and one month animations you provided.  It looks like daily variations largely go away if you average readings over longer periods of time, which helps you to see bigger patterns.  

As well, by looking at them and reading this post (and previous ones), it sounds like El Niño and the MJO are factors that influence our weather (with their effects becoming more apparent when looking at two week or monthly averages).  From reading the stratospheric polar vortex blog, it looks like the SPV is a factor as well.  And, human-caused global warming is another factor (albeit one that is getting bigger over time).  There are probably other ones, too.

Is all of this correct?

Regardless, thanks for putting this post together, and for explaining things.