If you feel like this September has been warmer than past Septembers your feeling would be correct. September is usually a month of transition towards fall with both fall like weather and summer like weather but this September we have seen more summer like weather than is normal. Here are some stats.
In September of 2006 we had 9 mornings with lows in the 40s and only 4 afternoons with highs of 85 and above.
In 2007 we have had only 4 mornings start in the 40s and 15 days with afternoon highs of 85 and above.