Or at least hottest August ever measured. Original data here. I've plotted the 12 month average as a better picture of the underlying reality. Data for just one month will be more volatile than for 12 months.
Note the 1998 spike in temps. That was an el nino year as this and next year are likely to be. And the climate change denialists used that year to begin their "evidence" that global temperatures had stabilised. The infamous "hiatus". Yet any unbiased observer can see that that was an anomalous year. Probably this year will be too, but that is little comfort. The trend is inexorably up.
Disclaimer. After nearly 40 years managing money for some of the largest life offices and investment managers in the world, I think I have something to offer. But I can't by law give you advice, and I do make mistakes. Remember: the unexpected sometimes happens. Oddly enough, the expected does too, but all too often it takes longer than you thought it would, or on the other hand happens more quickly than you expected. The Goddess of Markets punishes (eventually) greed, folly, laziness and arrogance. No matter how many years you've served Her. Take care. Be humble. And don't blame me.
BTW, clicking on most charts will produce the original-sized, i.e., bigger version.