Since 1998, GISS has shown some interesting changes to the US temperature data – as seen in the blink comparator above. The present got warmer and the past got cooler.

Nevertheless, the most recent GISS graph shows that US temperatures have cooled back down to close to the mean.

Despite the post-1998 upwards adjustments, US temperatures are still a full degree cooler than the warmest years of 1930s. Perhaps another dose of Viagra is needed.