August was quite a month for the S&P 500, with a high of 3,013 set on the first day of the month, followed by the index hitting its low for the month on August 5th: 2,822. That is a 6.8% range for the month, which appears to be pretty typical for the index (other than that crazy 2017-18 run!).
The S&P 500 closed the month at 2,926 which is slightly under the 3-month moving average, at 2,949 but well above the 10-month moving average, at 2,813. Both moving averages are rising, which is always a good sign.
September has been a decent month for the S&P 500, over the past two years (new all-time highs in 2017 and 2018). Whether that will be the case in 2019 is anyone's guess, but market conditions look ripe for a resumption of gains.