That’s Darwin, Australia.  And it was right before there were some adjustments made to the thermometer readings to turn a temperature decline into a climb.  Global warming and all, you know.

The blue is the original data.  The red is the “adjusted” number.  And the black line shows how much adjustment was done.

Read a nice summary here, or the detailed report (with over 500 comments!) here.  And if you want to drop into a time warp, read about Al Gore’s assertion that the leaked emails are ten years old.  Not so – some are currently  less than a month old.