September 2014 began and ended with significantly warmer than average temperatures. Sept. 1-6 was 8.5 degrees above average while Sept. 26-30 was +7.5. Meanwhile, the days in between (Sept. 7-25) were 1.5 cooler than average. For the entire month, September was 1.7 degrees above average, with a dozen days five degrees or more above average. This was the mildest September in three years and the 35th mildest among all Septembers since records began in 1870.
The warm spell between Aug. 31 thru Sept. 6 was the longest stretch of warm weather all year (every day had a high of 86° or warmer) and included the hottest day of the year, Sept. 2, which had a high/low of 92/77 (thirteen degrees above average). And the fifteen-day streak of 80-degree (or warmer) days between Aug. 24 to Sept. 7 was also the lengthiest of the year.
Since 1960 only September 2005 was drier than this September as just 1.21" fell. Since records began this ranks as twelfth driest. (Sept. 2005 is tied for second place, with just 0.48" measured.) The "rainiest" day was on 9/25 when 0.32" was measured in Central Park.
August and September's combined rainfall of 3.46" was five inches below average and the least to fall during these two months since 1995. Among all years on record this two-month combo ranks eleventh.
Finally, this was New York's most above average month, temperature wise, since last October (which was 3.3 degrees above average) and the driest, also since last October (which had just 0.36" of rain).